Removed enhanced For from World and WorldRegion.

L2J_Mobius_1.0_Ertheia/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_2.5_Underground/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_3.0_Helios/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_4.0_GrandCrusade/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_5.0_Salvation/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_5.5_EtinasFate/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_6.0_Fafurion/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_C1_HarbingersOfWar/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_C4_ScionsOfDestiny/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/handler/ISkillHandler.java

@@ -16,7 +16,6 @@
  */
 package org.l2jmobius.gameserver.handler;
 
-import java.io.IOException;
 import java.util.List;
 
 import org.l2jmobius.gameserver.model.Skill;
@@ -30,9 +29,8 @@ public interface ISkillHandler
 	 * @param creature
 	 * @param skill
 	 * @param targets
-	 * @throws IOException
 	 */
-	void useSkill(Creature creature, Skill skill, List<Creature> targets) throws IOException;
+	void useSkill(Creature creature, Skill skill, List<Creature> targets);
 	
 	/**
 	 * this method is called at initialization to register all the item ids automatically

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/handler/skillhandlers/Disablers.java

@@ -16,7 +16,6 @@
  */
 package org.l2jmobius.gameserver.handler.skillhandlers;
 
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.logging.Logger;
@@ -675,14 +674,14 @@ public class Disablers implements ISkillHandler
 								final List<Creature> tgts = new ArrayList<>();
 								tgts.add(target);
 								
-								try
+								// try
-								{
+								// {
-									healhandler.useSkill(creature, skill, tgts);
+								healhandler.useSkill(creature, skill, tgts);
-								}
+								// }
-								catch (IOException e)
+								// catch (IOException e)
-								{
+								// {
-									LOGGER.warning(e.getMessage());
+								// LOGGER.warning(e.getMessage());
-								}
+								// }
 							}
 						}
 						for (String stat : negateEffectTypes)

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/World.java

@@ -115,21 +115,9 @@ public class World
 	 */
 	public void removeObjects(List<WorldObject> list)
 	{
-		for (WorldObject o : list)
+		for (int i = 0; i < list.size(); i++)
 		{
-			_allObjects.remove(o.getObjectId());
+			_allObjects.remove(list.get(i).getObjectId());
-		}
-	}
-	
-	/**
-	 * Removes the objects.
-	 * @param objects the objects
-	 */
-	public void removeObjects(WorldObject[] objects)
-	{
-		for (WorldObject o : objects)
-		{
-			_allObjects.remove(o.getObjectId());
 		}
 	}
 	
@@ -138,12 +126,12 @@ public class World
 	 * <br>
 	 * <b><u>Example of use</u>:</b><br>
 	 * <li>Client packets : Action, AttackRequest, RequestJoinParty, RequestJoinPledge...</li><br>
-	 * @param oID Identifier of the WorldObject
+	 * @param objectId Identifier of the WorldObject
 	 * @return the object
 	 */
-	public WorldObject findObject(int oID)
+	public WorldObject findObject(int objectId)
 	{
-		return _allObjects.get(oID);
+		return _allObjects.get(objectId);
 	}
 	
 	/**
@@ -308,12 +296,10 @@ public class World
 			}
 			
 			// Go through the visible objects contained in the circular area
-			for (WorldObject wo : getVisibleObjects(object, 2000))
+			final List<WorldObject> visibleObjects = getVisibleObjects(object, 2000);
+			for (int i = 0; i < visibleObjects.size(); i++)
 			{
-				if (wo == null)
+				final WorldObject wo = visibleObjects.get(i);
-				{
-					continue;
-				}
 				
 				// Add the object in WorldObjectHashSet(WorldObject) _knownObjects of the visible Creature according to conditions :
 				// - Creature is visible
@@ -342,8 +328,11 @@ public class World
 		}
 		
 		// Go through the visible objects contained in the circular area
-		for (WorldObject wo : getVisibleObjects(object, 2000))
+		final List<WorldObject> visibleObjects = getVisibleObjects(object, 2000);
+		for (int i = 0; i < visibleObjects.size(); i++)
 		{
+			final WorldObject wo = visibleObjects.get(i);
+			
 			// Add the object in WorldObjectHashSet(WorldObject) _knownObjects of the visible Creature according to conditions :
 			// - Creature is visible
 			// - object is not already known
@@ -417,10 +406,14 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
+				
 				// Remove the WorldObject from the WorldObjectHashSet(WorldObject) _knownObjects of the surrounding WorldRegion Creatures
 				// If object is a PlayerInstance, remove the WorldObject from the WorldObjectHashSet(PlayerInstance) _knownPlayer of the surrounding WorldRegion Creatures
 				// If object is targeted by one of the surrounding WorldRegion Creatures, cancel ATTACK and cast
@@ -489,10 +482,13 @@ public class World
 		final List<WorldObject> result = new ArrayList<>();
 		
 		// Go through the list of region
-		for (WorldRegion worldRegion : region.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = region.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == null)
 				{
 					continue;
@@ -552,11 +548,14 @@ public class World
 		final List<WorldObject> result = new ArrayList<>();
 		
 		// Go through the list of region
-		for (WorldRegion worldRegion : region.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = region.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
 			// Go through visible objects of the selected region
-			for (WorldObject wo : worldRegion.getVisibleObjects())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == null)
 				{
 					continue;
@@ -614,10 +613,13 @@ public class World
 		final List<WorldObject> result = new ArrayList<>();
 		
 		// Go through visible object of the selected region
-		for (WorldRegion worldRegion : object.getWorldRegion().getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = object.getWorldRegion().getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == null)
 				{
 					continue;
@@ -644,58 +646,6 @@ public class World
 		return result;
 	}
 	
-	/**
-	 * Return all visible players of the WorldRegion object's and of its surrounding WorldRegion.<br>
-	 * <br>
-	 * <b><u>Concept</u>:</b><br>
-	 * <br>
-	 * All visible object are identified in <b>_visibleObjects</b> of their current WorldRegion<br>
-	 * All surrounding WorldRegion are identified in <b>_surroundingRegions</b> of the selected WorldRegion in order to scan a large area around a WorldObject<br>
-	 * <br>
-	 * <b><u>Example of use</u>:</b><br>
-	 * <li>Find Close Objects for Creature</li><br>
-	 * @param object WorldObject that determine the current WorldRegion
-	 * @return the visible playable
-	 */
-	public List<PlayerInstance> getVisiblePlayers(WorldObject object)
-	{
-		final WorldRegion region = object.getWorldRegion();
-		if (region == null)
-		{
-			return Collections.emptyList();
-		}
-		
-		// Create a list in order to contain all visible WorldObject
-		final List<PlayerInstance> result = new ArrayList<>();
-		
-		// Go through the list of region
-		for (WorldRegion worldRegion : region.getSurroundingRegions())
-		{
-			// Go through visible object of the selected region
-			for (PlayerInstance playable : worldRegion.getAllPlayers())
-			{
-				if (playable == null)
-				{
-					continue;
-				}
-				
-				if (playable.equals(object))
-				{
-					continue; // skip our own character
-				}
-				
-				if (!playable.isSpawned())
-				{
-					continue; // skip dying objects
-				}
-				
-				result.add(playable);
-			}
-		}
-		
-		return result;
-	}
-	
 	/**
 	 * Calculate the current WorldRegions of the object according to its position (x,y).<br>
 	 * <br>
@@ -793,24 +743,6 @@ public class World
 		LOGGER.info("All visible NPCs deleted.");
 	}
 	
-	/**
-	 * Gets the account players.
-	 * @param account the account_name
-	 * @return the account players
-	 */
-	public List<PlayerInstance> getAccountPlayers(String account)
-	{
-		final List<PlayerInstance> result = new ArrayList<>();
-		for (PlayerInstance actual : _allPlayers.values())
-		{
-			if (actual.getAccountName().equals(account))
-			{
-				result.add(actual);
-			}
-		}
-		return result;
-	}
-	
 	public static World getInstance()
 	{
 		return SingletonHolder.INSTANCE;

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,10 +16,9 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Collection;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ScheduledFuture;
 import java.util.logging.Logger;
 
@@ -31,9 +30,7 @@ import org.l2jmobius.gameserver.ai.SiegeGuardAI;
 import org.l2jmobius.gameserver.datatables.sql.SpawnTable;
 import org.l2jmobius.gameserver.model.actor.Attackable;
 import org.l2jmobius.gameserver.model.actor.Creature;
-import org.l2jmobius.gameserver.model.actor.Playable;
 import org.l2jmobius.gameserver.model.actor.instance.NpcInstance;
-import org.l2jmobius.gameserver.model.actor.instance.PlayerInstance;
 import org.l2jmobius.gameserver.model.spawn.Spawn;
 import org.l2jmobius.gameserver.model.zone.ZoneManager;
 import org.l2jmobius.gameserver.model.zone.ZoneType;
@@ -44,8 +41,7 @@ public class WorldRegion
 {
 	private static final Logger LOGGER = Logger.getLogger(WorldRegion.class.getName());
 	
-	private final Collection<PlayerInstance> _playerObjects = ConcurrentHashMap.newKeySet();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	private final Collection<WorldObject> _visibleObjects = ConcurrentHashMap.newKeySet();
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -74,7 +70,6 @@ public class WorldRegion
 		{
 			return;
 		}
-		
 		_zoneManager.unregisterZone(zone);
 	}
 	
@@ -127,8 +122,9 @@ public class WorldRegion
 	{
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects)
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo instanceof Attackable)
 				{
 					final Attackable mob = (Attackable) wo;
@@ -174,8 +170,9 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects)
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo instanceof Attackable)
 				{
 					// Start HP/MP/CP Regeneration task
@@ -190,20 +187,28 @@ public class WorldRegion
 		}
 	}
 	
-	public Boolean isActive()
+	public boolean isActive()
 	{
 		return _active;
 	}
 	
 	// check if all 9 neighbors (including self) are inactive or active but with no players.
 	// returns true if the above condition is met.
-	public Boolean areNeighborsEmpty()
+	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && !worldRegion.getAllPlayers().isEmpty())
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -246,9 +251,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -272,8 +277,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -296,18 +302,19 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.add(object);
+		synchronized (_visibleObjects)
-		
-		if (object instanceof PlayerInstance)
 		{
-			_playerObjects.add((PlayerInstance) object);
+			if (!_visibleObjects.contains(object))
-			
-			// if this is the first player to enter the region, activate self & neighbors
-			if ((_playerObjects.size() == 1) && !Config.GRIDS_ALWAYS_ON)
 			{
-				startActivation();
+				_visibleObjects.add(object);
 			}
 		}
+		
+		// If this is the first player to enter the region, activate self and neighbors.
+		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
+		{
+			startActivation();
+		}
 	}
 	
 	/**
@@ -323,22 +330,36 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.remove(object);
+		if (_visibleObjects.isEmpty())
-		
-		if (object instanceof Playable)
 		{
-			_playerObjects.remove(object);
+			return;
+		}
 		
-			if (_playerObjects.isEmpty() && !Config.GRIDS_ALWAYS_ON)
+		synchronized (_visibleObjects)
-			{
+		{
-				startDeactivation();
+			_visibleObjects.remove(object);
-			}
+		}
+		
+		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
+		{
+			startDeactivation();
 		}
 	}
 	
 	public void setSurroundingRegions(WorldRegion[] regions)
 	{
 		_surroundingRegions = regions;
+		
+		// Make sure that this region is always the first region to improve bulk operations when this region should be updated first.
+		for (int i = 0; i < _surroundingRegions.length; i++)
+		{
+			if (_surroundingRegions[i] == this)
+			{
+				final WorldRegion first = _surroundingRegions[0];
+				_surroundingRegions[0] = this;
+				_surroundingRegions[i] = first;
+			}
+		}
 	}
 	
 	/**
@@ -349,12 +370,7 @@ public class WorldRegion
 		return _surroundingRegions;
 	}
 	
-	public Collection<PlayerInstance> getAllPlayers()
+	public List<WorldObject> getVisibleObjects()
-	{
-		return _playerObjects;
-	}
-	
-	public Collection<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}
@@ -370,8 +386,9 @@ public class WorldRegion
 	public synchronized void deleteVisibleNpcSpawns()
 	{
 		LOGGER.info("Deleting all visible NPCs in Region: " + getName());
-		for (WorldObject obj : _visibleObjects)
+		for (int i = 0; i < _visibleObjects.size(); i++)
 		{
+			final WorldObject obj = _visibleObjects.get(i);
 			if (obj instanceof NpcInstance)
 			{
 				final NpcInstance target = (NpcInstance) obj;
@@ -404,8 +421,10 @@ public class WorldRegion
 			final int down = y - range;
 			final int left = x + range;
 			final int right = x - range;
-			for (ZoneType e : _zoneManager.getZones())
+			final List<ZoneType> zones = _zoneManager.getZones();
+			for (int i = 0; i < zones.size(); i++)
 			{
+				final ZoneType e = zones.get(i);
 				if (e instanceof PeaceZone)
 				{
 					if (e.isInsideZone(x, up, z))

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/actor/knownlist/WorldObjectKnownList.java

@@ -141,9 +141,9 @@ public class WorldObjectKnownList
 		else
 		{
 			// Go through all visible WorldObject near the Creature
-			for (WorldObject playable : World.getInstance().getVisiblePlayers(_activeObject))
+			for (WorldObject object : World.getInstance().getVisibleObjects(_activeObject))
 			{
-				if (playable == null)
+				if ((object == null) || !object.isPlayable())
 				{
 					return;
 				}
@@ -151,7 +151,7 @@ public class WorldObjectKnownList
 				// Try to add object to active object's known objects
 				// Creature only needs to see visible PlayerInstance and PlayableInstance, when moving. Other creatures are currently only known from initial spawn area.
 				// Possibly look into getDistanceToForgetObject values before modifying this approach...
-				addKnownObject(playable);
+				addKnownObject(object);
 			}
 		}
 	}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/items/Weapon.java

@@ -16,7 +16,6 @@
  */
 package org.l2jmobius.gameserver.model.items;
 
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -404,36 +403,36 @@ public class Weapon extends Item
 				continue; // Skill condition not met
 			}
 			
-			try
+			// try
+			// {
+			// Get the skill handler corresponding to the skill type
+			final ISkillHandler handler = SkillHandler.getInstance().getSkillHandler(skill.getSkillType());
+			final List<Creature> targets = new ArrayList<>();
+			targets.add(target);
+			
+			// Launch the magic skill and calculate its effects
+			if (handler != null)
 			{
-				// Get the skill handler corresponding to the skill type
+				handler.useSkill(caster, skill, targets);
-				final ISkillHandler handler = SkillHandler.getInstance().getSkillHandler(skill.getSkillType());
-				final List<Creature> targets = new ArrayList<>();
-				targets.add(target);
-				
-				// Launch the magic skill and calculate its effects
-				if (handler != null)
-				{
-					handler.useSkill(caster, skill, targets);
-				}
-				else
-				{
-					skill.useSkill(caster, targets);
-				}
-				
-				if ((caster instanceof PlayerInstance) && (target instanceof NpcInstance))
-				{
-					for (Quest quest : ((NpcInstance) target).getTemplate().getEventQuests(EventType.ON_SKILL_USE))
-					{
-						quest.notifySkillUse((NpcInstance) target, (PlayerInstance) caster, skill);
-					}
-				}
-				
-				output = true;
 			}
-			catch (IOException e)
+			else
 			{
+				skill.useSkill(caster, targets);
 			}
+			
+			if ((caster instanceof PlayerInstance) && (target instanceof NpcInstance))
+			{
+				for (Quest quest : ((NpcInstance) target).getTemplate().getEventQuests(EventType.ON_SKILL_USE))
+				{
+					quest.notifySkillUse((NpcInstance) target, (PlayerInstance) caster, skill);
+				}
+			}
+			
+			output = true;
+			// }
+			// catch (IOException e)
+			// {
+			// }
 		}
 		
 		return output;

L2J_Mobius_C6_Interlude/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/handler/ISkillHandler.java

@@ -16,7 +16,6 @@
  */
 package org.l2jmobius.gameserver.handler;
 
-import java.io.IOException;
 import java.util.List;
 
 import org.l2jmobius.gameserver.model.Skill;
@@ -30,9 +29,8 @@ public interface ISkillHandler
 	 * @param creature
 	 * @param skill
 	 * @param targets
-	 * @throws IOException
 	 */
-	void useSkill(Creature creature, Skill skill, List<Creature> targets) throws IOException;
+	void useSkill(Creature creature, Skill skill, List<Creature> targets);
 	
 	/**
 	 * this method is called at initialization to register all the item ids automatically

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/handler/skillhandlers/Disablers.java

@@ -16,7 +16,6 @@
  */
 package org.l2jmobius.gameserver.handler.skillhandlers;
 
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.logging.Logger;
@@ -675,14 +674,14 @@ public class Disablers implements ISkillHandler
 								final List<Creature> tgts = new ArrayList<>();
 								tgts.add(target);
 								
-								try
+								// try
-								{
+								// {
-									healhandler.useSkill(creature, skill, tgts);
+								healhandler.useSkill(creature, skill, tgts);
-								}
+								// }
-								catch (IOException e)
+								// catch (IOException e)
-								{
+								// {
-									LOGGER.warning(e.getMessage());
+								// LOGGER.warning(e.getMessage());
-								}
+								// }
 							}
 						}
 						for (String stat : negateEffectTypes)

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/World.java

@@ -115,21 +115,9 @@ public class World
 	 */
 	public void removeObjects(List<WorldObject> list)
 	{
-		for (WorldObject o : list)
+		for (int i = 0; i < list.size(); i++)
 		{
-			_allObjects.remove(o.getObjectId());
+			_allObjects.remove(list.get(i).getObjectId());
-		}
-	}
-	
-	/**
-	 * Removes the objects.
-	 * @param objects the objects
-	 */
-	public void removeObjects(WorldObject[] objects)
-	{
-		for (WorldObject o : objects)
-		{
-			_allObjects.remove(o.getObjectId());
 		}
 	}
 	
@@ -138,12 +126,12 @@ public class World
 	 * <br>
 	 * <b><u>Example of use</u>:</b><br>
 	 * <li>Client packets : Action, AttackRequest, RequestJoinParty, RequestJoinPledge...</li><br>
-	 * @param oID Identifier of the WorldObject
+	 * @param objectId Identifier of the WorldObject
 	 * @return the object
 	 */
-	public WorldObject findObject(int oID)
+	public WorldObject findObject(int objectId)
 	{
-		return _allObjects.get(oID);
+		return _allObjects.get(objectId);
 	}
 	
 	/**
@@ -308,12 +296,10 @@ public class World
 			}
 			
 			// Go through the visible objects contained in the circular area
-			for (WorldObject wo : getVisibleObjects(object, 2000))
+			final List<WorldObject> visibleObjects = getVisibleObjects(object, 2000);
+			for (int i = 0; i < visibleObjects.size(); i++)
 			{
-				if (wo == null)
+				final WorldObject wo = visibleObjects.get(i);
-				{
-					continue;
-				}
 				
 				// Add the object in WorldObjectHashSet(WorldObject) _knownObjects of the visible Creature according to conditions :
 				// - Creature is visible
@@ -342,8 +328,11 @@ public class World
 		}
 		
 		// Go through the visible objects contained in the circular area
-		for (WorldObject wo : getVisibleObjects(object, 2000))
+		final List<WorldObject> visibleObjects = getVisibleObjects(object, 2000);
+		for (int i = 0; i < visibleObjects.size(); i++)
 		{
+			final WorldObject wo = visibleObjects.get(i);
+			
 			// Add the object in WorldObjectHashSet(WorldObject) _knownObjects of the visible Creature according to conditions :
 			// - Creature is visible
 			// - object is not already known
@@ -417,10 +406,14 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
+				
 				// Remove the WorldObject from the WorldObjectHashSet(WorldObject) _knownObjects of the surrounding WorldRegion Creatures
 				// If object is a PlayerInstance, remove the WorldObject from the WorldObjectHashSet(PlayerInstance) _knownPlayer of the surrounding WorldRegion Creatures
 				// If object is targeted by one of the surrounding WorldRegion Creatures, cancel ATTACK and cast
@@ -489,10 +482,13 @@ public class World
 		final List<WorldObject> result = new ArrayList<>();
 		
 		// Go through the list of region
-		for (WorldRegion worldRegion : region.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = region.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == null)
 				{
 					continue;
@@ -552,11 +548,14 @@ public class World
 		final List<WorldObject> result = new ArrayList<>();
 		
 		// Go through the list of region
-		for (WorldRegion worldRegion : region.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = region.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
 			// Go through visible objects of the selected region
-			for (WorldObject wo : worldRegion.getVisibleObjects())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == null)
 				{
 					continue;
@@ -614,10 +613,13 @@ public class World
 		final List<WorldObject> result = new ArrayList<>();
 		
 		// Go through visible object of the selected region
-		for (WorldRegion worldRegion : object.getWorldRegion().getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = object.getWorldRegion().getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == null)
 				{
 					continue;
@@ -644,58 +646,6 @@ public class World
 		return result;
 	}
 	
-	/**
-	 * Return all visible players of the WorldRegion object's and of its surrounding WorldRegion.<br>
-	 * <br>
-	 * <b><u>Concept</u>:</b><br>
-	 * <br>
-	 * All visible object are identified in <b>_visibleObjects</b> of their current WorldRegion<br>
-	 * All surrounding WorldRegion are identified in <b>_surroundingRegions</b> of the selected WorldRegion in order to scan a large area around a WorldObject<br>
-	 * <br>
-	 * <b><u>Example of use</u>:</b><br>
-	 * <li>Find Close Objects for Creature</li><br>
-	 * @param object WorldObject that determine the current WorldRegion
-	 * @return the visible playable
-	 */
-	public List<PlayerInstance> getVisiblePlayers(WorldObject object)
-	{
-		final WorldRegion region = object.getWorldRegion();
-		if (region == null)
-		{
-			return Collections.emptyList();
-		}
-		
-		// Create a list in order to contain all visible WorldObject
-		final List<PlayerInstance> result = new ArrayList<>();
-		
-		// Go through the list of region
-		for (WorldRegion worldRegion : region.getSurroundingRegions())
-		{
-			// Go through visible object of the selected region
-			for (PlayerInstance playable : worldRegion.getAllPlayers())
-			{
-				if (playable == null)
-				{
-					continue;
-				}
-				
-				if (playable.equals(object))
-				{
-					continue; // skip our own character
-				}
-				
-				if (!playable.isSpawned())
-				{
-					continue; // skip dying objects
-				}
-				
-				result.add(playable);
-			}
-		}
-		
-		return result;
-	}
-	
 	/**
 	 * Calculate the current WorldRegions of the object according to its position (x,y).<br>
 	 * <br>
@@ -793,24 +743,6 @@ public class World
 		LOGGER.info("All visible NPCs deleted.");
 	}
 	
-	/**
-	 * Gets the account players.
-	 * @param account the account_name
-	 * @return the account players
-	 */
-	public List<PlayerInstance> getAccountPlayers(String account)
-	{
-		final List<PlayerInstance> result = new ArrayList<>();
-		for (PlayerInstance actual : _allPlayers.values())
-		{
-			if (actual.getAccountName().equals(account))
-			{
-				result.add(actual);
-			}
-		}
-		return result;
-	}
-	
 	public static World getInstance()
 	{
 		return SingletonHolder.INSTANCE;

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,10 +16,9 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Collection;
+import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
-import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ScheduledFuture;
 import java.util.logging.Logger;
 
@@ -31,9 +30,7 @@ import org.l2jmobius.gameserver.ai.SiegeGuardAI;
 import org.l2jmobius.gameserver.datatables.sql.SpawnTable;
 import org.l2jmobius.gameserver.model.actor.Attackable;
 import org.l2jmobius.gameserver.model.actor.Creature;
-import org.l2jmobius.gameserver.model.actor.Playable;
 import org.l2jmobius.gameserver.model.actor.instance.NpcInstance;
-import org.l2jmobius.gameserver.model.actor.instance.PlayerInstance;
 import org.l2jmobius.gameserver.model.spawn.Spawn;
 import org.l2jmobius.gameserver.model.zone.ZoneManager;
 import org.l2jmobius.gameserver.model.zone.ZoneType;
@@ -44,8 +41,7 @@ public class WorldRegion
 {
 	private static final Logger LOGGER = Logger.getLogger(WorldRegion.class.getName());
 	
-	private final Collection<PlayerInstance> _playerObjects = ConcurrentHashMap.newKeySet();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	private final Collection<WorldObject> _visibleObjects = ConcurrentHashMap.newKeySet();
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -74,7 +70,6 @@ public class WorldRegion
 		{
 			return;
 		}
-		
 		_zoneManager.unregisterZone(zone);
 	}
 	
@@ -127,8 +122,9 @@ public class WorldRegion
 	{
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects)
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo instanceof Attackable)
 				{
 					final Attackable mob = (Attackable) wo;
@@ -174,8 +170,9 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects)
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo instanceof Attackable)
 				{
 					// Start HP/MP/CP Regeneration task
@@ -190,20 +187,28 @@ public class WorldRegion
 		}
 	}
 	
-	public Boolean isActive()
+	public boolean isActive()
 	{
 		return _active;
 	}
 	
 	// check if all 9 neighbors (including self) are inactive or active but with no players.
 	// returns true if the above condition is met.
-	public Boolean areNeighborsEmpty()
+	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && !worldRegion.getAllPlayers().isEmpty())
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -246,9 +251,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -272,8 +277,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -296,18 +302,19 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.add(object);
+		synchronized (_visibleObjects)
-		
-		if (object instanceof PlayerInstance)
 		{
-			_playerObjects.add((PlayerInstance) object);
+			if (!_visibleObjects.contains(object))
-			
-			// if this is the first player to enter the region, activate self & neighbors
-			if ((_playerObjects.size() == 1) && !Config.GRIDS_ALWAYS_ON)
 			{
-				startActivation();
+				_visibleObjects.add(object);
 			}
 		}
+		
+		// If this is the first player to enter the region, activate self and neighbors.
+		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
+		{
+			startActivation();
+		}
 	}
 	
 	/**
@@ -323,22 +330,36 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.remove(object);
+		if (_visibleObjects.isEmpty())
-		
-		if (object instanceof Playable)
 		{
-			_playerObjects.remove(object);
+			return;
+		}
 		
-			if (_playerObjects.isEmpty() && !Config.GRIDS_ALWAYS_ON)
+		synchronized (_visibleObjects)
-			{
+		{
-				startDeactivation();
+			_visibleObjects.remove(object);
-			}
+		}
+		
+		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
+		{
+			startDeactivation();
 		}
 	}
 	
 	public void setSurroundingRegions(WorldRegion[] regions)
 	{
 		_surroundingRegions = regions;
+		
+		// Make sure that this region is always the first region to improve bulk operations when this region should be updated first.
+		for (int i = 0; i < _surroundingRegions.length; i++)
+		{
+			if (_surroundingRegions[i] == this)
+			{
+				final WorldRegion first = _surroundingRegions[0];
+				_surroundingRegions[0] = this;
+				_surroundingRegions[i] = first;
+			}
+		}
 	}
 	
 	/**
@@ -349,12 +370,7 @@ public class WorldRegion
 		return _surroundingRegions;
 	}
 	
-	public Collection<PlayerInstance> getAllPlayers()
+	public List<WorldObject> getVisibleObjects()
-	{
-		return _playerObjects;
-	}
-	
-	public Collection<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}
@@ -370,8 +386,9 @@ public class WorldRegion
 	public synchronized void deleteVisibleNpcSpawns()
 	{
 		LOGGER.info("Deleting all visible NPCs in Region: " + getName());
-		for (WorldObject obj : _visibleObjects)
+		for (int i = 0; i < _visibleObjects.size(); i++)
 		{
+			final WorldObject obj = _visibleObjects.get(i);
 			if (obj instanceof NpcInstance)
 			{
 				final NpcInstance target = (NpcInstance) obj;
@@ -404,8 +421,10 @@ public class WorldRegion
 			final int down = y - range;
 			final int left = x + range;
 			final int right = x - range;
-			for (ZoneType e : _zoneManager.getZones())
+			final List<ZoneType> zones = _zoneManager.getZones();
+			for (int i = 0; i < zones.size(); i++)
 			{
+				final ZoneType e = zones.get(i);
 				if (e instanceof PeaceZone)
 				{
 					if (e.isInsideZone(x, up, z))

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/actor/knownlist/WorldObjectKnownList.java

@@ -141,9 +141,9 @@ public class WorldObjectKnownList
 		else
 		{
 			// Go through all visible WorldObject near the Creature
-			for (WorldObject playable : World.getInstance().getVisiblePlayers(_activeObject))
+			for (WorldObject object : World.getInstance().getVisibleObjects(_activeObject))
 			{
-				if (playable == null)
+				if ((object == null) || !object.isPlayable())
 				{
 					return;
 				}
@@ -151,7 +151,7 @@ public class WorldObjectKnownList
 				// Try to add object to active object's known objects
 				// Creature only needs to see visible PlayerInstance and PlayableInstance, when moving. Other creatures are currently only known from initial spawn area.
 				// Possibly look into getDistanceToForgetObject values before modifying this approach...
-				addKnownObject(playable);
+				addKnownObject(object);
 			}
 		}
 	}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/items/Weapon.java

@@ -16,7 +16,6 @@
  */
 package org.l2jmobius.gameserver.model.items;
 
-import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -404,36 +403,36 @@ public class Weapon extends Item
 				continue; // Skill condition not met
 			}
 			
-			try
+			// try
+			// {
+			// Get the skill handler corresponding to the skill type
+			final ISkillHandler handler = SkillHandler.getInstance().getSkillHandler(skill.getSkillType());
+			final List<Creature> targets = new ArrayList<>();
+			targets.add(target);
+			
+			// Launch the magic skill and calculate its effects
+			if (handler != null)
 			{
-				// Get the skill handler corresponding to the skill type
+				handler.useSkill(caster, skill, targets);
-				final ISkillHandler handler = SkillHandler.getInstance().getSkillHandler(skill.getSkillType());
-				final List<Creature> targets = new ArrayList<>();
-				targets.add(target);
-				
-				// Launch the magic skill and calculate its effects
-				if (handler != null)
-				{
-					handler.useSkill(caster, skill, targets);
-				}
-				else
-				{
-					skill.useSkill(caster, targets);
-				}
-				
-				if ((caster instanceof PlayerInstance) && (target instanceof NpcInstance))
-				{
-					for (Quest quest : ((NpcInstance) target).getTemplate().getEventQuests(EventType.ON_SKILL_USE))
-					{
-						quest.notifySkillUse((NpcInstance) target, (PlayerInstance) caster, skill);
-					}
-				}
-				
-				output = true;
 			}
-			catch (IOException e)
+			else
 			{
+				skill.useSkill(caster, targets);
 			}
+			
+			if ((caster instanceof PlayerInstance) && (target instanceof NpcInstance))
+			{
+				for (Quest quest : ((NpcInstance) target).getTemplate().getEventQuests(EventType.ON_SKILL_USE))
+				{
+					quest.notifySkillUse((NpcInstance) target, (PlayerInstance) caster, skill);
+				}
+			}
+			
+			output = true;
+			// }
+			// catch (IOException e)
+			// {
+			// }
 		}
 		
 		return output;

L2J_Mobius_CT_2.4_Epilogue/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/model/World.java

@@ -402,10 +402,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -462,15 +465,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -518,15 +525,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			} 
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceId() != object.getInstanceId()))
 				{
 					continue;
@@ -606,27 +617,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceId() != object.getInstanceId())
+				if (wo.getInstanceId() != object.getInstanceId())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -658,29 +672,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceId() != object.getInstanceId())
+				if (wo.getInstanceId() != object.getInstanceId())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_CT_2.6_HighFive/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/model/World.java

@@ -402,10 +402,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -462,15 +465,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -518,15 +525,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			} 
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceId() != object.getInstanceId()))
 				{
 					continue;
@@ -606,27 +617,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceId() != object.getInstanceId())
+				if (wo.getInstanceId() != object.getInstanceId())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -658,29 +672,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceId() != object.getInstanceId())
+				if (wo.getInstanceId() != object.getInstanceId())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_Classic_2.0_Saviors/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_Classic_2.1_Zaken/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_Classic_2.2_Antharas/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_Classic_2.3_SevenSigns/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_Classic_2.4_SecretOfEmpire/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_Classic_3.0_TheKamael/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_Classic_3.0_TheKamael/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}

L2J_Mobius_Classic_Interlude/.settings/org.eclipse.jdt.ui.prefs

@@ -94,7 +94,7 @@ sp_cleanup.always_use_parentheses_in_expressions=true
 sp_cleanup.always_use_this_for_non_static_field_access=false
 sp_cleanup.always_use_this_for_non_static_method_access=false
 sp_cleanup.convert_functional_interfaces=true
-sp_cleanup.convert_to_enhanced_for_loop=true
+sp_cleanup.convert_to_enhanced_for_loop=false
 sp_cleanup.correct_indentation=false
 sp_cleanup.format_source_code=true
 sp_cleanup.format_source_code_changes_only=false
@@ -106,18 +106,23 @@ sp_cleanup.make_type_abstract_if_missing_method=false
 sp_cleanup.make_variable_declarations_final=true
 sp_cleanup.never_use_blocks=false
 sp_cleanup.never_use_parentheses_in_expressions=false
+sp_cleanup.number_suffix=false
 sp_cleanup.on_save_use_additional_actions=true
 sp_cleanup.organize_imports=true
+sp_cleanup.push_down_negation=false
 sp_cleanup.qualify_static_field_accesses_with_declaring_class=false
 sp_cleanup.qualify_static_member_accesses_through_instances_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_through_subtypes_with_declaring_class=true
 sp_cleanup.qualify_static_member_accesses_with_declaring_class=true
 sp_cleanup.qualify_static_method_accesses_with_declaring_class=false
 sp_cleanup.remove_private_constructors=true
+sp_cleanup.remove_redundant_modifiers=false
+sp_cleanup.remove_redundant_semicolons=false
 sp_cleanup.remove_redundant_type_arguments=false
 sp_cleanup.remove_trailing_whitespaces=false
 sp_cleanup.remove_trailing_whitespaces_all=true
 sp_cleanup.remove_trailing_whitespaces_ignore_empty=true
+sp_cleanup.remove_unnecessary_array_creation=false
 sp_cleanup.remove_unnecessary_casts=true
 sp_cleanup.remove_unnecessary_nls_tags=true
 sp_cleanup.remove_unused_imports=true
@@ -126,11 +131,14 @@ sp_cleanup.remove_unused_private_fields=true
 sp_cleanup.remove_unused_private_members=false
 sp_cleanup.remove_unused_private_methods=true
 sp_cleanup.remove_unused_private_types=true
+sp_cleanup.simplify_lambda_expression_and_method_ref=false
 sp_cleanup.sort_members=false
 sp_cleanup.sort_members_all=false
 sp_cleanup.use_anonymous_class_creation=false
+sp_cleanup.use_autoboxing=false
 sp_cleanup.use_blocks=true
 sp_cleanup.use_blocks_only_for_return_and_throw=false
+sp_cleanup.use_directly_map_method=false
 sp_cleanup.use_lambda=true
 sp_cleanup.use_parentheses_in_expressions=true
 sp_cleanup.use_this_for_non_static_field_access=false
@@ -138,3 +146,4 @@ sp_cleanup.use_this_for_non_static_field_access_only_if_necessary=true
 sp_cleanup.use_this_for_non_static_method_access=false
 sp_cleanup.use_this_for_non_static_method_access_only_if_necessary=true
 sp_cleanup.use_type_arguments=false
+sp_cleanup.use_unboxing=false

L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/World.java

@@ -406,10 +406,13 @@ public class World
 		oldRegion.removeVisibleObject(object);
 		
 		// Go through all surrounding WorldRegion Creatures
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -466,15 +469,19 @@ public class World
 			return;
 		}
 		
-		for (WorldRegion worldRegion : oldRegion.getSurroundingRegions())
+		final WorldRegion[] oldSurroundingRegions = oldRegion.getSurroundingRegions();
+		for (int i = 0; i < oldSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = oldSurroundingRegions[i];
 			if (newRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if (wo == object)
 				{
 					continue;
@@ -522,15 +529,19 @@ public class World
 			}
 		}
 		
-		for (WorldRegion worldRegion : newRegion.getSurroundingRegions())
+		final WorldRegion[] newSurroundingRegions = newRegion.getSurroundingRegions();
+		for (int i = 0; i < newSurroundingRegions.length; i++)
 		{
+			final WorldRegion worldRegion = newSurroundingRegions[i];
 			if (oldRegion.isSurroundingRegion(worldRegion))
 			{
 				continue;
 			}
 			
-			for (WorldObject wo : worldRegion.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = worldRegion.getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
+				final WorldObject wo = visibleObjects.get(j);
 				if ((wo == object) || (wo.getInstanceWorld() != object.getInstanceWorld()))
 				{
 					continue;
@@ -610,27 +621,30 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				c.accept(clazz.cast(visibleObject));
+				c.accept(clazz.cast(wo));
 			}
 		}
 	}
@@ -662,29 +676,32 @@ public class World
 			return;
 		}
 		
-		final WorldRegion centerWorldRegion = getRegion(object);
+		final WorldRegion worldRegion = getRegion(object);
-		if (centerWorldRegion == null)
+		if (worldRegion == null)
 		{
 			return;
 		}
 		
-		for (WorldRegion region : centerWorldRegion.getSurroundingRegions())
+		final WorldRegion[] surroundingRegions = worldRegion.getSurroundingRegions();
+		for (int i = 0; i < surroundingRegions.length; i++)
 		{
-			for (WorldObject visibleObject : region.getVisibleObjects().values())
+			final List<WorldObject> visibleObjects = surroundingRegions[i].getVisibleObjects();
+			for (int j = 0; j < visibleObjects.size(); j++)
 			{
-				if ((visibleObject == null) || (visibleObject == object) || !clazz.isInstance(visibleObject))
+				final WorldObject wo = visibleObjects.get(j);
+				if ((wo == null) || (wo == object) || !clazz.isInstance(wo))
 				{
 					continue;
 				}
 				
-				if (visibleObject.getInstanceWorld() != object.getInstanceWorld())
+				if (wo.getInstanceWorld() != object.getInstanceWorld())
 				{
 					continue;
 				}
 				
-				if (visibleObject.calculateDistance3D(object) <= range)
+				if (wo.calculateDistance3D(object) <= range)
 				{
-					c.accept(clazz.cast(visibleObject));
+					c.accept(clazz.cast(wo));
 				}
 			}
 		}

L2J_Mobius_Classic_Interlude/java/org/l2jmobius/gameserver/model/WorldRegion.java

@@ -16,8 +16,8 @@
  */
 package org.l2jmobius.gameserver.model;
 
-import java.util.Map;
+import java.util.ArrayList;
-import java.util.concurrent.ConcurrentHashMap;
+import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 
 import org.l2jmobius.Config;
@@ -28,9 +28,9 @@ import org.l2jmobius.gameserver.taskmanager.RandomAnimationTaskManager;
 
 public class WorldRegion
 {
-	/** Map containing visible objects in this world region. */
+	/** List containing visible objects in this world region. */
-	private final Map<Integer, WorldObject> _visibleObjects = new ConcurrentHashMap<>();
+	private final List<WorldObject> _visibleObjects = new ArrayList<>();
-	/** Map containing nearby regions forming this world region's effective area. */
+	/** Array containing nearby regions forming this world region's effective area. */
 	private WorldRegion[] _surroundingRegions;
 	private final int _regionX;
 	private final int _regionY;
@@ -52,8 +52,9 @@ public class WorldRegion
 		
 		if (!isOn)
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					final Attackable mob = (Attackable) wo;
@@ -87,15 +88,16 @@ public class WorldRegion
 		}
 		else
 		{
-			for (WorldObject wo : _visibleObjects.values())
+			for (int i = 0; i < _visibleObjects.size(); i++)
 			{
+				final WorldObject wo = _visibleObjects.get(i);
 				if (wo.isAttackable())
 				{
 					// Start HP/MP/CP regeneration task.
 					((Attackable) wo).getStatus().startHpMpRegeneration();
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
-				else if (wo instanceof Npc)
+				else if (wo.isNpc())
 				{
 					RandomAnimationTaskManager.getInstance().add((Npc) wo);
 				}
@@ -110,11 +112,19 @@ public class WorldRegion
 	
 	public boolean areNeighborsEmpty()
 	{
-		for (WorldRegion worldRegion : _surroundingRegions)
+		for (int i = 0; i < _surroundingRegions.length; i++)
 		{
-			if (worldRegion.isActive() && worldRegion.getVisibleObjects().values().stream().anyMatch(WorldObject::isPlayable))
+			final WorldRegion worldRegion = _surroundingRegions[i];
+			if (worldRegion.isActive())
 			{
-				return false;
+				final List<WorldObject> regionObjects = worldRegion.getVisibleObjects();
+				for (int j = 0; j < regionObjects.size(); j++)
+				{
+					if (regionObjects.get(j).isPlayable())
+					{
+						return false;
+					}
+				}
 			}
 		}
 		return true;
@@ -157,9 +167,9 @@ public class WorldRegion
 			// Then, set a timer to activate the neighbors.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
-					worldRegion.setActive(true);
+					_surroundingRegions[i].setActive(true);
 				}
 			}, 1000 * Config.GRID_NEIGHBOR_TURNON_TIME);
 		}
@@ -183,8 +193,9 @@ public class WorldRegion
 			// Suggest means: first check if a neighbor has PlayerInstances in it. If not, deactivate.
 			_neighborsTask = ThreadPool.schedule(() ->
 			{
-				for (WorldRegion worldRegion : _surroundingRegions)
+				for (int i = 0; i < _surroundingRegions.length; i++)
 				{
+					final WorldRegion worldRegion = _surroundingRegions[i];
 					if (worldRegion.areNeighborsEmpty())
 					{
 						worldRegion.setActive(false);
@@ -206,7 +217,13 @@ public class WorldRegion
 			return;
 		}
 		
-		_visibleObjects.put(object.getObjectId(), object);
+		synchronized (_visibleObjects)
+		{
+			if (!_visibleObjects.contains(object))
+			{
+				_visibleObjects.add(object);
+			}
+		}
 		
 		// If this is the first player to enter the region, activate self and neighbors.
 		if (object.isPlayable() && !_active && !Config.GRIDS_ALWAYS_ON)
@@ -230,7 +247,11 @@ public class WorldRegion
 		{
 			return;
 		}
-		_visibleObjects.remove(object.getObjectId());
+		
+		synchronized (_visibleObjects)
+		{
+			_visibleObjects.remove(object);
+		}
 		
 		if (object.isPlayable() && areNeighborsEmpty() && !Config.GRIDS_ALWAYS_ON)
 		{
@@ -238,7 +259,7 @@ public class WorldRegion
 		}
 	}
 	
-	public Map<Integer, WorldObject> getVisibleObjects()
+	public List<WorldObject> getVisibleObjects()
 	{
 		return _visibleObjects;
 	}