Use of isEmpty method when possible.

L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -454,7 +454,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -447,7 +447,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -447,7 +447,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -447,7 +447,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -446,7 +446,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -446,7 +446,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -446,7 +446,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -446,7 +446,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/network/clientpackets/RequestAcquireSkill.java

@@ -388,7 +388,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.BASECLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION));
 				}
@@ -438,7 +438,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.DUALCLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION_DUALCLASS));
 				}

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExOlympiadHeroAndLegendInfo.java

@@ -47,7 +47,7 @@ public class ExOlympiadHeroAndLegendInfo implements IClientOutgoingPacket
 	{
 		OutgoingPackets.EX_OLYMPIAD_HERO_AND_LEGEND_INFO.writeId(packet);
 		
-		if (Hero.getInstance().getHeroes().size() > 0)
+		if (!Hero.getInstance().getHeroes().isEmpty())
 		{
 			try (Connection con = DatabaseFactory.getConnection();
 				PreparedStatement statement = con.prepareStatement(GET_HEROES))

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExOlympiadRankingInfo.java

@@ -66,7 +66,7 @@ public class ExOlympiadRankingInfo implements IClientOutgoingPacket
 		packet.writeD(_serverId); // 0 - all servers, server id - for caller server
 		packet.writeD(933); // unk, 933 all time
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			switch (_tabId)
 			{
@@ -83,7 +83,7 @@ public class ExOlympiadRankingInfo implements IClientOutgoingPacket
 							packet.writeString(player.getString("clanName")); // clan name
 							packet.writeD(id); // rank
 							
-							if (_snapshotList.size() > 0)
+							if (!_snapshotList.isEmpty())
 							{
 								for (Integer id2 : _snapshotList.keySet())
 								{
@@ -137,7 +137,7 @@ public class ExOlympiadRankingInfo implements IClientOutgoingPacket
 									packet.writeString(plr.getString("name"));
 									packet.writeString(plr.getString("clanName"));
 									packet.writeD(id2);
-									if (_snapshotList.size() > 0)
+									if (!_snapshotList.isEmpty())
 									{
 										for (Integer id3 : _snapshotList.keySet())
 										{
@@ -196,7 +196,7 @@ public class ExOlympiadRankingInfo implements IClientOutgoingPacket
 								packet.writeString(player.getString("name"));
 								packet.writeString(player.getString("clanName"));
 								packet.writeD(i); // class rank
-								if (_snapshotList.size() > 0)
+								if (!_snapshotList.isEmpty())
 								{
 									final Map<Integer, StatSet> snapshotRaceList = new ConcurrentHashMap<>();
 									int j = 1;

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExRankingCharInfo.java

@@ -49,7 +49,7 @@ public class ExRankingCharInfo implements IClientOutgoingPacket
 	{
 		OutgoingPackets.EX_RANKING_CHAR_INFO.writeId(packet);
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			for (Integer id : _playerList.keySet())
 			{

L2J_Mobius_7.0_PreludeOfWar/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExRankingCharRankers.java

@@ -60,7 +60,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 		packet.writeC(_scope);
 		packet.writeD(_race);
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			switch (_group)
 			{
@@ -80,7 +80,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 							packet.writeD(player.getInt("classId"));
 							packet.writeD(player.getInt("race"));
 							packet.writeD(id); // server rank
-							if (_snapshotList.size() > 0)
+							if (!_snapshotList.isEmpty())
 							{
 								for (Integer id2 : _snapshotList.keySet())
 								{
@@ -128,7 +128,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 									packet.writeD(plr.getInt("race"));
 									packet.writeD(id2); // server rank
 									
-									if (_snapshotList.size() > 0)
+									if (!_snapshotList.isEmpty())
 									{
 										for (Integer id3 : _snapshotList.keySet())
 										{
@@ -177,7 +177,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 								packet.writeD(player.getInt("classId"));
 								packet.writeD(player.getInt("race"));
 								packet.writeD(i); // server rank
-								if (_snapshotList.size() > 0)
+								if (!_snapshotList.isEmpty())
 								{
 									final Map<Integer, StatSet> snapshotRaceList = new ConcurrentHashMap<>();
 									int j = 1;
@@ -289,7 +289,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 							packet.writeD(player.getInt("classId"));
 							packet.writeD(player.getInt("race"));
 							packet.writeD(id); // clan rank
-							if (_snapshotList.size() > 0)
+							if (!_snapshotList.isEmpty())
 							{
 								for (Integer id2 : _snapshotList.keySet())
 								{
@@ -316,7 +316,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 				}
 				case 3: // friend
 				{
-					if (_player.getFriendList().size() > 0)
+					if (!_player.getFriendList().isEmpty())
 					{
 						final Set<Integer> friendList = ConcurrentHashMap.newKeySet();
 						int count = 1;
@@ -347,7 +347,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 								packet.writeD(player.getInt("classId"));
 								packet.writeD(player.getInt("race"));
 								packet.writeD(id); // friend rank
-								if (_snapshotList.size() > 0)
+								if (!_snapshotList.isEmpty())
 								{
 									for (Integer id2 : _snapshotList.keySet())
 									{
@@ -384,7 +384,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 						packet.writeD(_player.getBaseClass());
 						packet.writeD(_player.getRace().ordinal());
 						packet.writeD(1); // clan rank
-						if (_snapshotList.size() > 0)
+						if (!_snapshotList.isEmpty())
 						{
 							for (Integer id : _snapshotList.keySet())
 							{

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -446,7 +446,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/clientpackets/RequestAcquireSkill.java

@@ -388,7 +388,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.BASECLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION));
 				}
@@ -438,7 +438,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.DUALCLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION_DUALCLASS));
 				}

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExOlympiadHeroAndLegendInfo.java

@@ -47,7 +47,7 @@ public class ExOlympiadHeroAndLegendInfo implements IClientOutgoingPacket
 	{
 		OutgoingPackets.EX_OLYMPIAD_HERO_AND_LEGEND_INFO.writeId(packet);
 		
-		if (Hero.getInstance().getHeroes().size() > 0)
+		if (!Hero.getInstance().getHeroes().isEmpty())
 		{
 			try (Connection con = DatabaseFactory.getConnection();
 				PreparedStatement statement = con.prepareStatement(GET_HEROES))

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExOlympiadRankingInfo.java

@@ -72,7 +72,7 @@ public class ExOlympiadRankingInfo implements IClientOutgoingPacket
 		packet.writeD(_serverId); // 0 - all servers, server id - for caller server
 		packet.writeD(933); // unk, 933 all time
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			final RankingOlympiadCategory category = RankingOlympiadCategory.values()[_tabId];
 			writeFilteredRankingData(packet, category, category.getScopeByGroup(_rankingType), ClassId.getClassId(_classId));
@@ -144,7 +144,7 @@ public class ExOlympiadRankingInfo implements IClientOutgoingPacket
 			packet.writeString(player.getString("clanName")); // clan name
 			packet.writeD(scope == RankingOlympiadScope.SELF ? data.getKey() : curRank); // rank
 			
-			if (snapshot.size() > 0)
+			if (!snapshot.isEmpty())
 			{
 				int snapshotRank = 1;
 				for (Entry<Integer, StatSet> ssData : snapshot.stream().sorted(Entry.comparingByKey()).collect(Collectors.toList()))

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExPvpRankingList.java

@@ -65,7 +65,7 @@ public class ExPvpRankingList implements IClientOutgoingPacket
 		packet.writeC(_tabId);
 		packet.writeC(_type);
 		packet.writeD(_race);
-		if ((_playerList.size() > 0) && (_type != 255) && (_race != 255))
+		if (!_playerList.isEmpty() && (_type != 255) && (_race != 255))
 		{
 			final RankingCategory category = RankingCategory.values()[_tabId];
 			writeFilteredRankingData(packet, category, category.getScopeByGroup(_type), Race.values()[_race]);
@@ -152,7 +152,7 @@ public class ExPvpRankingList implements IClientOutgoingPacket
 			packet.writeD(player.getInt("race"));
 			packet.writeD(player.getInt("classId"));
 			packet.writeQ(player.getInt("points")); // server rank
-			if (snapshot.size() > 0)
+			if (!snapshot.isEmpty())
 			{
 				for (Entry<Integer, StatSet> ssData : snapshot.stream().sorted(Entry.comparingByKey()).collect(Collectors.toList()))
 				{

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExPvpRankingMyInfo.java

@@ -46,7 +46,7 @@ public class ExPvpRankingMyInfo implements IClientOutgoingPacket
 	public boolean write(PacketWriter packet)
 	{
 		OutgoingPackets.EX_PVP_RANKING_MY_INFO.writeId(packet);
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			boolean found = false;
 			for (Integer id : _playerList.keySet())

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExRankingCharInfo.java

@@ -49,7 +49,7 @@ public class ExRankingCharInfo implements IClientOutgoingPacket
 	{
 		OutgoingPackets.EX_RANKING_CHAR_INFO.writeId(packet);
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			for (Integer id : _playerList.keySet())
 			{

L2J_Mobius_8.0_Homunculus/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExRankingCharRankers.java

@@ -66,7 +66,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 		packet.writeD(_ordinal);
 		packet.writeD(_player.getClassId().getId());
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			final RankingCategory category = RankingCategory.values()[_group];
 			writeFilteredRankingData(packet, category, category.getScopeByGroup(_scope));
@@ -159,7 +159,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 			packet.writeD(player.getInt("classId"));
 			packet.writeD(player.getInt("race"));
 			packet.writeD(scope == RankingScope.SELF ? data.getKey() : curRank); // server rank
-			if (snapshot.size() > 0)
+			if (!snapshot.isEmpty())
 			{
 				int snapshotRank = 1;
 				for (Entry<Integer, StatSet> ssData : snapshot.stream().sorted(Entry.comparingByKey()).collect(Collectors.toList()))

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -446,7 +446,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/clientpackets/RequestAcquireSkill.java

@@ -388,7 +388,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.BASECLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION));
 				}
@@ -438,7 +438,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.DUALCLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION_DUALCLASS));
 				}

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExOlympiadHeroAndLegendInfo.java

@@ -47,7 +47,7 @@ public class ExOlympiadHeroAndLegendInfo implements IClientOutgoingPacket
 	{
 		OutgoingPackets.EX_OLYMPIAD_HERO_AND_LEGEND_INFO.writeId(packet);
 		
-		if (Hero.getInstance().getHeroes().size() > 0)
+		if (!Hero.getInstance().getHeroes().isEmpty())
 		{
 			try (Connection con = DatabaseFactory.getConnection();
 				PreparedStatement statement = con.prepareStatement(GET_HEROES))

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExOlympiadRankingInfo.java

@@ -72,7 +72,7 @@ public class ExOlympiadRankingInfo implements IClientOutgoingPacket
 		packet.writeD(_serverId); // 0 - all servers, server id - for caller server
 		packet.writeD(933); // unk, 933 all time
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			final RankingOlympiadCategory category = RankingOlympiadCategory.values()[_tabId];
 			writeFilteredRankingData(packet, category, category.getScopeByGroup(_rankingType), ClassId.getClassId(_classId));
@@ -144,7 +144,7 @@ public class ExOlympiadRankingInfo implements IClientOutgoingPacket
 			packet.writeString(player.getString("clanName")); // clan name
 			packet.writeD(scope == RankingOlympiadScope.SELF ? data.getKey() : curRank); // rank
 			
-			if (snapshot.size() > 0)
+			if (!snapshot.isEmpty())
 			{
 				int snapshotRank = 1;
 				for (Entry<Integer, StatSet> ssData : snapshot.stream().sorted(Entry.comparingByKey()).collect(Collectors.toList()))

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExPvpRankingList.java

@@ -65,7 +65,7 @@ public class ExPvpRankingList implements IClientOutgoingPacket
 		packet.writeC(_tabId);
 		packet.writeC(_type);
 		packet.writeD(_race);
-		if ((_playerList.size() > 0) && (_type != 255) && (_race != 255))
+		if (!_playerList.isEmpty() && (_type != 255) && (_race != 255))
 		{
 			final RankingCategory category = RankingCategory.values()[_tabId];
 			writeFilteredRankingData(packet, category, category.getScopeByGroup(_type), Race.values()[_race]);
@@ -152,7 +152,7 @@ public class ExPvpRankingList implements IClientOutgoingPacket
 			packet.writeD(player.getInt("race"));
 			packet.writeD(player.getInt("classId"));
 			packet.writeQ(player.getInt("points")); // server rank
-			if (snapshot.size() > 0)
+			if (!snapshot.isEmpty())
 			{
 				for (Entry<Integer, StatSet> ssData : snapshot.stream().sorted(Entry.comparingByKey()).collect(Collectors.toList()))
 				{

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExPvpRankingMyInfo.java

@@ -46,7 +46,7 @@ public class ExPvpRankingMyInfo implements IClientOutgoingPacket
 	public boolean write(PacketWriter packet)
 	{
 		OutgoingPackets.EX_PVP_RANKING_MY_INFO.writeId(packet);
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			boolean found = false;
 			for (Integer id : _playerList.keySet())

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExRankingCharInfo.java

@@ -49,7 +49,7 @@ public class ExRankingCharInfo implements IClientOutgoingPacket
 	{
 		OutgoingPackets.EX_RANKING_CHAR_INFO.writeId(packet);
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			for (Integer id : _playerList.keySet())
 			{

L2J_Mobius_9.0_ReturnOfTheQueenAnt/java/org/l2jmobius/gameserver/network/serverpackets/ranking/ExRankingCharRankers.java

@@ -66,7 +66,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 		packet.writeD(_ordinal);
 		packet.writeD(_player.getClassId().getId());
 		
-		if (_playerList.size() > 0)
+		if (!_playerList.isEmpty())
 		{
 			final RankingCategory category = RankingCategory.values()[_group];
 			writeFilteredRankingData(packet, category, category.getScopeByGroup(_scope));
@@ -159,7 +159,7 @@ public class ExRankingCharRankers implements IClientOutgoingPacket
 			packet.writeD(player.getInt("classId"));
 			packet.writeD(player.getInt("race"));
 			packet.writeD(scope == RankingScope.SELF ? data.getKey() : curRank); // server rank
-			if (snapshot.size() > 0)
+			if (!snapshot.isEmpty())
 			{
 				int snapshotRank = 1;
 				for (Entry<Integer, StatSet> ssData : snapshot.stream().sorted(Entry.comparingByKey()).collect(Collectors.toList()))

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/GameServer.java

@@ -378,7 +378,7 @@ public class GameServer
 		printSection("Quests");
 		if (!Config.ALT_DEV_NO_QUESTS)
 		{
-			if (QuestManager.getInstance().getQuests().size() == 0)
+			if (QuestManager.getInstance().getQuests().isEmpty())
 			{
 				QuestManager.getInstance().reloadAllQuests();
 			}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/AttackableAI.java

@@ -330,7 +330,7 @@ public class AttackableAI extends CreatureAI
 				final Attackable npc = getActiveChar();
 				
 				// If its _knownPlayer isn't empty set the Intention to AI_INTENTION_ACTIVE
-				if (npc.getKnownList().getKnownPlayers().size() > 0)
+				if (!npc.getKnownList().getKnownPlayers().isEmpty())
 				{
 					intention = AI_INTENTION_ACTIVE;
 				}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/FortSiegeGuardAI.java

@@ -218,7 +218,7 @@ public class FortSiegeGuardAI extends CreatureAI implements Runnable
 				final Attackable npc = (Attackable) _actor;
 				
 				// If its _knownPlayer isn't empty set the Intention to AI_INTENTION_ACTIVE
-				if (npc.getKnownList().getKnownPlayers().size() > 0)
+				if (!npc.getKnownList().getKnownPlayers().isEmpty())
 				{
 					intention = AI_INTENTION_ACTIVE;
 				}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/ai/SiegeGuardAI.java

@@ -168,7 +168,7 @@ public class SiegeGuardAI extends CreatureAI implements Runnable
 				final Attackable npc = (Attackable) _actor;
 				
 				// If its _knownPlayer isn't empty set the Intention to AI_INTENTION_ACTIVE
-				if (npc.getKnownList().getKnownPlayers().size() > 0)
+				if (!npc.getKnownList().getKnownPlayers().isEmpty())
 				{
 					intention = AI_INTENTION_ACTIVE;
 				}

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

@@ -503,7 +503,7 @@ public class Disablers implements ISkillHandler
 									}
 								}
 							}
-							if ((Config.RESTORE_CANCELLED_BUFFS_SECONDS > 0) && (cancelledBuffs.size() > 0))
+							if ((Config.RESTORE_CANCELLED_BUFFS_SECONDS > 0) && !cancelledBuffs.isEmpty())
 							{
 								ThreadPool.schedule(new CancelSkillRestoreTask((PlayerInstance) target, cancelledBuffs), Config.RESTORE_CANCELLED_BUFFS_SECONDS * 1000);
 							}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/instancemanager/PetitionManager.java

@@ -525,7 +525,7 @@ public class PetitionManager
 	{
 		final StringBuilder htmlContent = new StringBuilder("<html><body><center><font color=\"LEVEL\">Current Petitions</font><br><table width=\"300\">");
 		final SimpleDateFormat dateFormat = new SimpleDateFormat("dd MMM HH:mm z");
-		if (_pendingPetitions.size() == 0)
+		if (_pendingPetitions.isEmpty())
 		{
 			htmlContent.append("<tr><td colspan=\"4\">There are no currently pending petitions.</td></tr>");
 		}

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

@@ -201,7 +201,7 @@ public class MobGroup
 	{
 		removeDead();
 		
-		if (getMobs().size() == 0)
+		if (getMobs().isEmpty())
 		{
 			return null;
 		}
@@ -214,7 +214,7 @@ public class MobGroup
 	{
 		removeDead();
 		
-		if (getMobs().size() == 0)
+		if (getMobs().isEmpty())
 		{
 			return;
 		}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/actor/Creature.java

@@ -6649,7 +6649,7 @@ public abstract class Creature extends WorldObject implements ISkillsHolder
 				}
 			}
 			
-			if (_chanceSkills.size() == 0)
+			if (_chanceSkills.isEmpty())
 			{
 				_chanceSkills = null;
 			}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/actor/instance/ClassMasterInstance.java

@@ -132,7 +132,7 @@ public class ClassMasterInstance extends FolkInstance
 						}
 					}
 					
-					if ((Config.CLASS_MASTER_SETTINGS.getRequireItems(jobLevel) != null) && (Config.CLASS_MASTER_SETTINGS.getRequireItems(jobLevel).size() > 0))
+					if ((Config.CLASS_MASTER_SETTINGS.getRequireItems(jobLevel) != null) && !Config.CLASS_MASTER_SETTINGS.getRequireItems(jobLevel).isEmpty())
 					{
 						sb.append("<br><br>Item(s) required for class change:");
 						sb.append("<table width=220>");

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -9799,7 +9799,7 @@ public class PlayerInstance extends Playable
 		}
 		
 		// Triggered skills cannot be used directly
-		if ((_triggeredSkills.size() > 0) && (_triggeredSkills.get(skill.getId()) != null))
+		if (!_triggeredSkills.isEmpty() && (_triggeredSkills.get(skill.getId()) != null))
 		{
 			sendPacket(ActionFailed.STATIC_PACKET);
 			return;
@@ -10570,7 +10570,7 @@ public class PlayerInstance extends Playable
 	public void unsummonAllCubics()
 	{
 		// Unsummon Cubics
-		if (_cubics.size() > 0)
+		if (!_cubics.isEmpty())
 		{
 			for (CubicInstance cubic : _cubics.values())
 			{
@@ -10691,7 +10691,7 @@ public class PlayerInstance extends Playable
 	{
 		ItemInstance item;
 		IItemHandler handler;
-		if ((_activeSoulShots == null) || (_activeSoulShots.size() == 0))
+		if ((_activeSoulShots == null) || (_activeSoulShots.isEmpty()))
 		{
 			return;
 		}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/actor/instance/WarehouseInstance.java

@@ -171,7 +171,7 @@ public class WarehouseInstance extends FolkInstance
 	private void showDepositWindowFreight(PlayerInstance player)
 	{
 		// No other chars in the account of this player
-		if (player.getAccountChars().size() == 0)
+		if (player.getAccountChars().isEmpty())
 		{
 			player.sendPacket(SystemMessageId.THAT_CHARACTER_DOES_NOT_EXIST);
 		}

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/actor/stat/CreatureStat.java

@@ -65,10 +65,10 @@ public class CreatureStat
 		}
 		
 		final int id = stat.ordinal();
-		final Calculator c = _creature.getCalculators()[id];
+		final Calculator calc = _creature.getCalculators()[id];
 		
 		// If no Func object found, no modifier is applied
-		if ((c == null) || (c.size() == 0))
+		if ((calc == null) || (calc.size() == 0))
 		{
 			return init;
 		}
@@ -82,7 +82,7 @@ public class CreatureStat
 		env.baseValue = init;
 		
 		// Launch the calculation
-		c.calc(env);
+		calc.calc(env);
 		// avoid some troubles with negative stats (some stats should never be negative)
 		if (env.value <= 0)
 		{

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/siege/clanhalls/BanditStrongholdSiege.java

@@ -76,7 +76,7 @@ public class BanditStrongholdSiege extends ClanHallSiege
 	public void startSiege()
 	{
 		setRegistrationPeriod(false);
-		if (_clansInfo.size() == 0)
+		if (_clansInfo.isEmpty())
 		{
 			endSiege(false);
 			return;

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/model/siege/clanhalls/WildBeastFarmSiege.java

@@ -73,7 +73,7 @@ public class WildBeastFarmSiege extends ClanHallSiege
 	public void startSiege()
 	{
 		setRegistrationPeriod(false);
-		if (_clansInfo.size() == 0)
+		if (_clansInfo.isEmpty())
 		{
 			endSiege(false);
 			return;

L2J_Mobius_C4_ScionsOfDestiny/java/org/l2jmobius/gameserver/network/serverpackets/FriendList.java

@@ -62,8 +62,6 @@ public class FriendList implements IClientOutgoingPacket
 	public boolean write(PacketWriter packet)
 	{
 		OutgoingPackets.FRIEND_LIST.writeId(packet);
-		if (_info.size() > 0)
-		{
 		packet.writeH(_info.size());
 		for (FriendInfo friend : _info)
 		{
@@ -73,7 +71,6 @@ public class FriendList implements IClientOutgoingPacket
 			packet.writeD(friend._online ? 0x01 : 0x00);
 			packet.writeH(0); // ??
 		}
-		}
 		return true;
 	}
 }

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/GameServer.java

@@ -390,7 +390,7 @@ public class GameServer
 		printSection("Quests");
 		if (!Config.ALT_DEV_NO_QUESTS)
 		{
-			if (QuestManager.getInstance().getQuests().size() == 0)
+			if (QuestManager.getInstance().getQuests().isEmpty())
 			{
 				QuestManager.getInstance().reloadAllQuests();
 			}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/AttackableAI.java

@@ -330,7 +330,7 @@ public class AttackableAI extends CreatureAI
 				final Attackable npc = getActiveChar();
 				
 				// If its _knownPlayer isn't empty set the Intention to AI_INTENTION_ACTIVE
-				if (npc.getKnownList().getKnownPlayers().size() > 0)
+				if (!npc.getKnownList().getKnownPlayers().isEmpty())
 				{
 					intention = AI_INTENTION_ACTIVE;
 				}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/FortSiegeGuardAI.java

@@ -218,7 +218,7 @@ public class FortSiegeGuardAI extends CreatureAI implements Runnable
 				final Attackable npc = (Attackable) _actor;
 				
 				// If its _knownPlayer isn't empty set the Intention to AI_INTENTION_ACTIVE
-				if (npc.getKnownList().getKnownPlayers().size() > 0)
+				if (!npc.getKnownList().getKnownPlayers().isEmpty())
 				{
 					intention = AI_INTENTION_ACTIVE;
 				}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/ai/SiegeGuardAI.java

@@ -168,7 +168,7 @@ public class SiegeGuardAI extends CreatureAI implements Runnable
 				final Attackable npc = (Attackable) _actor;
 				
 				// If its _knownPlayer isn't empty set the Intention to AI_INTENTION_ACTIVE
-				if (npc.getKnownList().getKnownPlayers().size() > 0)
+				if (!npc.getKnownList().getKnownPlayers().isEmpty())
 				{
 					intention = AI_INTENTION_ACTIVE;
 				}

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

@@ -503,7 +503,7 @@ public class Disablers implements ISkillHandler
 									}
 								}
 							}
-							if ((Config.RESTORE_CANCELLED_BUFFS_SECONDS > 0) && (cancelledBuffs.size() > 0))
+							if ((Config.RESTORE_CANCELLED_BUFFS_SECONDS > 0) && !cancelledBuffs.isEmpty())
 							{
 								ThreadPool.schedule(new CancelSkillRestoreTask((PlayerInstance) target, cancelledBuffs), Config.RESTORE_CANCELLED_BUFFS_SECONDS * 1000);
 							}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/instancemanager/PetitionManager.java

@@ -525,7 +525,7 @@ public class PetitionManager
 	{
 		final StringBuilder htmlContent = new StringBuilder("<html><body><center><font color=\"LEVEL\">Current Petitions</font><br><table width=\"300\">");
 		final SimpleDateFormat dateFormat = new SimpleDateFormat("dd MMM HH:mm z");
-		if (_pendingPetitions.size() == 0)
+		if (_pendingPetitions.isEmpty())
 		{
 			htmlContent.append("<tr><td colspan=\"4\">There are no currently pending petitions.</td></tr>");
 		}

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

@@ -201,7 +201,7 @@ public class MobGroup
 	{
 		removeDead();
 		
-		if (getMobs().size() == 0)
+		if (getMobs().isEmpty())
 		{
 			return null;
 		}
@@ -214,7 +214,7 @@ public class MobGroup
 	{
 		removeDead();
 		
-		if (getMobs().size() == 0)
+		if (getMobs().isEmpty())
 		{
 			return;
 		}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/actor/Creature.java

@@ -6696,7 +6696,7 @@ public abstract class Creature extends WorldObject implements ISkillsHolder
 				}
 			}
 			
-			if (_chanceSkills.size() == 0)
+			if (_chanceSkills.isEmpty())
 			{
 				_chanceSkills = null;
 			}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/actor/instance/ClassMasterInstance.java

@@ -132,7 +132,7 @@ public class ClassMasterInstance extends FolkInstance
 						}
 					}
 					
-					if ((Config.CLASS_MASTER_SETTINGS.getRequireItems(jobLevel) != null) && (Config.CLASS_MASTER_SETTINGS.getRequireItems(jobLevel).size() > 0))
+					if ((Config.CLASS_MASTER_SETTINGS.getRequireItems(jobLevel) != null) && !Config.CLASS_MASTER_SETTINGS.getRequireItems(jobLevel).isEmpty())
 					{
 						sb.append("<br><br>Item(s) required for class change:");
 						sb.append("<table width=220>");

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -9961,7 +9961,7 @@ public class PlayerInstance extends Playable
 		}
 		
 		// Triggered skills cannot be used directly
-		if ((_triggeredSkills.size() > 0) && (_triggeredSkills.get(skill.getId()) != null))
+		if (!_triggeredSkills.isEmpty() && (_triggeredSkills.get(skill.getId()) != null))
 		{
 			sendPacket(ActionFailed.STATIC_PACKET);
 			return;
@@ -10742,7 +10742,7 @@ public class PlayerInstance extends Playable
 	public void unsummonAllCubics()
 	{
 		// Unsummon Cubics
-		if (_cubics.size() > 0)
+		if (!_cubics.isEmpty())
 		{
 			for (CubicInstance cubic : _cubics.values())
 			{
@@ -10863,7 +10863,7 @@ public class PlayerInstance extends Playable
 	{
 		ItemInstance item;
 		IItemHandler handler;
-		if ((_activeSoulShots == null) || (_activeSoulShots.size() == 0))
+		if ((_activeSoulShots == null) || (_activeSoulShots.isEmpty()))
 		{
 			return;
 		}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/actor/instance/WarehouseInstance.java

@@ -171,7 +171,7 @@ public class WarehouseInstance extends FolkInstance
 	private void showDepositWindowFreight(PlayerInstance player)
 	{
 		// No other chars in the account of this player
-		if (player.getAccountChars().size() == 0)
+		if (player.getAccountChars().isEmpty())
 		{
 			player.sendPacket(SystemMessageId.THAT_CHARACTER_DOES_NOT_EXIST);
 		}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/actor/stat/CreatureStat.java

@@ -65,10 +65,10 @@ public class CreatureStat
 		}
 		
 		final int id = stat.ordinal();
-		final Calculator c = _creature.getCalculators()[id];
+		final Calculator calc = _creature.getCalculators()[id];
 		
 		// If no Func object found, no modifier is applied
-		if ((c == null) || (c.size() == 0))
+		if ((calc == null) || (calc.size() == 0))
 		{
 			return init;
 		}
@@ -82,7 +82,7 @@ public class CreatureStat
 		env.baseValue = init;
 		
 		// Launch the calculation
-		c.calc(env);
+		calc.calc(env);
 		// avoid some troubles with negative stats (some stats should never be negative)
 		if (env.value <= 0)
 		{

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/siege/clanhalls/BanditStrongholdSiege.java

@@ -76,7 +76,7 @@ public class BanditStrongholdSiege extends ClanHallSiege
 	public void startSiege()
 	{
 		setRegistrationPeriod(false);
-		if (_clansInfo.size() == 0)
+		if (_clansInfo.isEmpty())
 		{
 			endSiege(false);
 			return;

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/siege/clanhalls/WildBeastFarmSiege.java

@@ -73,7 +73,7 @@ public class WildBeastFarmSiege extends ClanHallSiege
 	public void startSiege()
 	{
 		setRegistrationPeriod(false);
-		if (_clansInfo.size() == 0)
+		if (_clansInfo.isEmpty())
 		{
 			endSiege(false);
 			return;

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/network/serverpackets/FriendList.java

@@ -63,12 +63,12 @@ public class FriendList implements IClientOutgoingPacket
 	{
 		OutgoingPackets.FRIEND_LIST.writeId(packet);
 		packet.writeD(_info.size());
-		for (FriendInfo info : _info)
+		for (FriendInfo friend : _info)
 		{
-			packet.writeD(info._objId);
-			packet.writeS(info._name);
-			packet.writeD(info._online ? 0x01 : 0x00);
-			packet.writeD(info._online ? info._objId : 0x00);
+			packet.writeD(friend._objId);
+			packet.writeS(friend._name);
+			packet.writeD(friend._online ? 0x01 : 0x00);
+			packet.writeD(friend._online ? friend._objId : 0x00);
 		}
 		return true;
 	}

L2J_Mobius_CT_2.4_Epilogue/dist/game/data/scripts/conquerablehalls/flagwar/FlagWar.java

@@ -562,7 +562,7 @@ public abstract class FlagWar extends ClanHallSiegeEngine
 	@Override
 	public void onSiegeEnds()
 	{
-		if (_data.size() > 0)
+		if (!_data.isEmpty())
 		{
 			for (int clanId : _data.keySet())
 			{

L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -476,7 +476,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Manage Base, Quests and Sweep drops of the Attackable
 			if ((mostDamageParty != null) && (mostDamageParty.damage > maxDamage))

L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/model/actor/stat/CreatureStat.java

@@ -86,10 +86,10 @@ public class CreatureStat
 		}
 		
 		final int id = stat.ordinal();
-		final Calculator c = _creature.getCalculators()[id];
+		final Calculator calc = _creature.getCalculators()[id];
 		
 		// If no Func object found, no modifier is applied
-		if ((c == null) || (c.size() == 0))
+		if ((calc == null) || (calc.size() == 0))
 		{
 			return value;
 		}
@@ -106,7 +106,7 @@ public class CreatureStat
 		}
 		
 		// Launch the calculation
-		value = c.calc(_creature, target, skill, value);
+		value = calc.calc(_creature, target, skill, value);
 		
 		// avoid some troubles with negative stats (some stats should never be negative)
 		if (value <= 0)

L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/model/siege/clanhalls/ClanHallSiegeEngine.java

@@ -121,7 +121,7 @@ public abstract class ClanHallSiegeEngine extends Quest implements Siegable
 			ps.setInt(1, _hall.getId());
 			ps.execute();
 			
-			if (_attackers.size() > 0)
+			if (!_attackers.isEmpty())
 			{
 				try (PreparedStatement insert = con.prepareStatement(SQL_SAVE_ATTACKERS))
 				{

L2J_Mobius_CT_2.4_Epilogue/java/org/l2jmobius/gameserver/network/serverpackets/GmViewQuestInfo.java

@@ -43,7 +43,7 @@ public class GmViewQuestInfo implements IClientOutgoingPacket
 		packet.writeS(_player.getName());
 		
 		final List<Quest> questList = _player.getAllActiveQuests();
-		if (questList.size() == 0)
+		if (questList.isEmpty())
 		{
 			packet.writeC(0);
 			packet.writeH(0);

L2J_Mobius_CT_2.6_HighFive/dist/game/data/scripts/conquerablehalls/flagwar/FlagWar.java

@@ -562,7 +562,7 @@ public abstract class FlagWar extends ClanHallSiegeEngine
 	@Override
 	public void onSiegeEnds()
 	{
-		if (_data.size() > 0)
+		if (!_data.isEmpty())
 		{
 			for (int clanId : _data.keySet())
 			{

L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -476,7 +476,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Manage Base, Quests and Sweep drops of the Attackable
 			if ((mostDamageParty != null) && (mostDamageParty.damage > maxDamage))

L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/model/actor/stat/CreatureStat.java

@@ -86,10 +86,10 @@ public class CreatureStat
 		}
 		
 		final int id = stat.ordinal();
-		final Calculator c = _creature.getCalculators()[id];
+		final Calculator calc = _creature.getCalculators()[id];
 		
 		// If no Func object found, no modifier is applied
-		if ((c == null) || (c.size() == 0))
+		if ((calc == null) || (calc.size() == 0))
 		{
 			return value;
 		}
@@ -106,7 +106,7 @@ public class CreatureStat
 		}
 		
 		// Launch the calculation
-		value = c.calc(_creature, target, skill, value);
+		value = calc.calc(_creature, target, skill, value);
 		
 		// avoid some troubles with negative stats (some stats should never be negative)
 		if (value <= 0)

L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/model/siege/clanhalls/ClanHallSiegeEngine.java

@@ -121,7 +121,7 @@ public abstract class ClanHallSiegeEngine extends Quest implements Siegable
 			ps.setInt(1, _hall.getId());
 			ps.execute();
 			
-			if (_attackers.size() > 0)
+			if (!_attackers.isEmpty())
 			{
 				try (PreparedStatement insert = con.prepareStatement(SQL_SAVE_ATTACKERS))
 				{

L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/network/serverpackets/GmViewQuestInfo.java

@@ -43,7 +43,7 @@ public class GmViewQuestInfo implements IClientOutgoingPacket
 		packet.writeS(_player.getName());
 		
 		final List<Quest> questList = _player.getAllActiveQuests();
-		if (questList.size() == 0)
+		if (questList.isEmpty())
 		{
 			packet.writeC(0);
 			packet.writeH(0);

L2J_Mobius_Classic_2.0_Saviors/dist/game/data/scripts/ai/areas/TowerOfInsolence/EnergyOfInsolence.java

@@ -179,7 +179,7 @@ public class EnergyOfInsolence extends AbstractNpcAI
 		if (CommonUtil.contains(ENERGY_OF_INSOLENCE_MINIONS, npc.getId()))
 		{
 			final MonsterInstance leader = ((MonsterInstance) npc).getLeader();
-			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().size() == 0) && !leader.isDead())
+			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().isEmpty()) && !leader.isDead())
 			{
 				makeMortal(leader);
 			}

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -447,7 +447,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/network/clientpackets/RequestAcquireSkill.java

@@ -436,7 +436,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.BASECLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION));
 				}
@@ -486,7 +486,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.DUALCLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION_DUALCLASS));
 				}

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/network/serverpackets/AcquireSkillList.java

@@ -66,7 +66,7 @@ public class AcquireSkillList implements IClientOutgoingPacket
 			packet.writeQ(skill.getLevelUpSp());
 			packet.writeC(skill.getGetLevel());
 			packet.writeC(0x00); // Skill dual class level.
-			if (skill.getRequiredItems().size() > 0)
+			if (!skill.getRequiredItems().isEmpty())
 			{
 				for (ItemHolder item : skill.getRequiredItems())
 				{

L2J_Mobius_Classic_2.1_Zaken/dist/game/data/scripts/ai/areas/TowerOfInsolence/EnergyOfInsolence.java

@@ -179,7 +179,7 @@ public class EnergyOfInsolence extends AbstractNpcAI
 		if (CommonUtil.contains(ENERGY_OF_INSOLENCE_MINIONS, npc.getId()))
 		{
 			final MonsterInstance leader = ((MonsterInstance) npc).getLeader();
-			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().size() == 0) && !leader.isDead())
+			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().isEmpty()) && !leader.isDead())
 			{
 				makeMortal(leader);
 			}

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -447,7 +447,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/network/clientpackets/RequestAcquireSkill.java

@@ -436,7 +436,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.BASECLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION));
 				}
@@ -486,7 +486,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.DUALCLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION_DUALCLASS));
 				}

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/network/serverpackets/AcquireSkillList.java

@@ -66,7 +66,7 @@ public class AcquireSkillList implements IClientOutgoingPacket
 			packet.writeQ(skill.getLevelUpSp());
 			packet.writeC(skill.getGetLevel());
 			packet.writeC(0x00); // Skill dual class level.
-			if (skill.getRequiredItems().size() > 0)
+			if (!skill.getRequiredItems().isEmpty())
 			{
 				for (ItemHolder item : skill.getRequiredItems())
 				{

L2J_Mobius_Classic_2.2_Antharas/dist/game/data/scripts/ai/areas/TowerOfInsolence/EnergyOfInsolence.java

@@ -179,7 +179,7 @@ public class EnergyOfInsolence extends AbstractNpcAI
 		if (CommonUtil.contains(ENERGY_OF_INSOLENCE_MINIONS, npc.getId()))
 		{
 			final MonsterInstance leader = ((MonsterInstance) npc).getLeader();
-			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().size() == 0) && !leader.isDead())
+			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().isEmpty()) && !leader.isDead())
 			{
 				makeMortal(leader);
 			}

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -447,7 +447,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/network/clientpackets/RequestAcquireSkill.java

@@ -436,7 +436,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.BASECLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION));
 				}
@@ -486,7 +486,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.DUALCLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION_DUALCLASS));
 				}

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/network/serverpackets/AcquireSkillList.java

@@ -67,7 +67,7 @@ public class AcquireSkillList implements IClientOutgoingPacket
 			packet.writeC(skill.getGetLevel());
 			packet.writeC(0x00); // Skill dual class level.
 			packet.writeC(_player.getKnownSkill(skill.getSkillId()) != null ? 0x00 : 0x01);
-			if (skill.getRequiredItems().size() > 0)
+			if (!skill.getRequiredItems().isEmpty())
 			{
 				for (ItemHolder item : skill.getRequiredItems())
 				{

L2J_Mobius_Classic_2.3_SevenSigns/dist/game/data/scripts/ai/areas/TowerOfInsolence/EnergyOfInsolence.java

@@ -179,7 +179,7 @@ public class EnergyOfInsolence extends AbstractNpcAI
 		if (CommonUtil.contains(ENERGY_OF_INSOLENCE_MINIONS, npc.getId()))
 		{
 			final MonsterInstance leader = ((MonsterInstance) npc).getLeader();
-			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().size() == 0) && !leader.isDead())
+			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().isEmpty()) && !leader.isDead())
 			{
 				makeMortal(leader);
 			}

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/actor/Attackable.java

@@ -449,7 +449,7 @@ public class Attackable extends Npc
 			
 			final PartyContainer mostDamageParty;
 			damagingParties.sort(Comparator.comparingLong(c -> c.damage));
-			mostDamageParty = damagingParties.size() > 0 ? damagingParties.get(0) : null;
+			mostDamageParty = !damagingParties.isEmpty() ? damagingParties.get(0) : null;
 			
 			// Calculate raidboss points
 			if (_isRaid && !_isRaidMinion)

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/network/clientpackets/RequestAcquireSkill.java

@@ -436,7 +436,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.BASECLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION));
 				}
@@ -486,7 +486,7 @@ public class RequestAcquireSkill implements IClientIncomingPacket
 				}
 				
 				final List<SkillLearn> skills = SkillTreeData.getInstance().getAvailableRevelationSkills(player, SubclassType.DUALCLASS);
-				if (skills.size() > 0)
+				if (!skills.isEmpty())
 				{
 					player.sendPacket(new ExAcquirableSkillListByClass(skills, AcquireSkillType.REVELATION_DUALCLASS));
 				}

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/network/clientpackets/luckygame/RequestLuckyGamePlay.java

@@ -129,7 +129,7 @@ public class RequestLuckyGamePlay implements IClientIncomingPacket
 		final int totalWeight = rewards.values().stream().mapToInt(list -> list.stream().mapToInt(item -> ItemTable.getInstance().getTemplate(item.getId()).getWeight()).sum()).sum();
 		
 		// Check inventory capacity
-		if ((rewards.size() > 0) && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
+		if (!rewards.isEmpty() && (!player.getInventory().validateCapacity(rewards.size()) || !player.getInventory().validateWeight(totalWeight)))
 		{
 			player.sendPacket(_type == LuckyGameType.LUXURY ? ExBettingLuckyGameResult.LUXURY_INVALID_CAPACITY : ExBettingLuckyGameResult.NORMAL_INVALID_CAPACITY);
 			player.sendPacket(SystemMessageId.YOUR_INVENTORY_IS_EITHER_FULL_OR_OVERWEIGHT);

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/network/serverpackets/AcquireSkillList.java

@@ -67,7 +67,7 @@ public class AcquireSkillList implements IClientOutgoingPacket
 			packet.writeC(skill.getGetLevel());
 			packet.writeC(0x00); // Skill dual class level.
 			packet.writeC(_player.getKnownSkill(skill.getSkillId()) != null ? 0x00 : 0x01);
-			if (skill.getRequiredItems().size() > 0)
+			if (!skill.getRequiredItems().isEmpty())
 			{
 				for (ItemHolder item : skill.getRequiredItems())
 				{

L2J_Mobius_Classic_2.4_SecretOfEmpire/dist/game/data/scripts/ai/areas/TowerOfInsolence/EnergyOfInsolence.java

@@ -179,7 +179,7 @@ public class EnergyOfInsolence extends AbstractNpcAI
 		if (CommonUtil.contains(ENERGY_OF_INSOLENCE_MINIONS, npc.getId()))
 		{
 			final MonsterInstance leader = ((MonsterInstance) npc).getLeader();
-			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().size() == 0) && !leader.isDead())
+			if ((leader != null) && (leader.getMinionList().getSpawnedMinions().isEmpty()) && !leader.isDead())
 			{
 				makeMortal(leader);
 			}