diff --git a/L2J_Mobius_1.0_Ertheia/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java b/L2J_Mobius_1.0_Ertheia/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
index 1e5f37773b..33cad136b0 100644
--- a/L2J_Mobius_1.0_Ertheia/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
+++ b/L2J_Mobius_1.0_Ertheia/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
@@ -379,7 +379,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 					if (data != null)
 					{
 						// Required items.
-						if (data.getItemsRequired().size() > 0)
+						if (!data.getItemsRequired().isEmpty())
 						{
 							for (ItemHolder ri : data.getItemsRequired())
 							{
@@ -395,7 +395,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 							}
 						}
 						// Give possible rewards.
-						if (data.getItemsRewarded().size() > 0)
+						if (!data.getItemsRewarded().isEmpty())
 						{
 							for (ItemHolder ri : data.getItemsRewarded())
 							{
@@ -808,7 +808,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 			if (data != null)
 			{
 				// Required items.
-				if (data.getItemsRequired().size() > 0)
+				if (!data.getItemsRequired().isEmpty())
 				{
 					for (ItemHolder ri : data.getItemsRequired())
 					{
@@ -824,7 +824,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 					}
 				}
 				// Give possible rewards.
-				if (data.getItemsRewarded().size() > 0)
+				if (!data.getItemsRewarded().isEmpty())
 				{
 					for (ItemHolder ri : data.getItemsRewarded())
 					{
diff --git a/L2J_Mobius_2.5_Underground/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java b/L2J_Mobius_2.5_Underground/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
index b1c5f28c99..f78e9ea7cd 100644
--- a/L2J_Mobius_2.5_Underground/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
+++ b/L2J_Mobius_2.5_Underground/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
@@ -379,7 +379,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 					if (data != null)
 					{
 						// Required items.
-						if (data.getItemsRequired().size() > 0)
+						if (!data.getItemsRequired().isEmpty())
 						{
 							for (ItemHolder ri : data.getItemsRequired())
 							{
@@ -395,7 +395,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 							}
 						}
 						// Give possible rewards.
-						if (data.getItemsRewarded().size() > 0)
+						if (!data.getItemsRewarded().isEmpty())
 						{
 							for (ItemHolder ri : data.getItemsRewarded())
 							{
@@ -808,7 +808,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 			if (data != null)
 			{
 				// Required items.
-				if (data.getItemsRequired().size() > 0)
+				if (!data.getItemsRequired().isEmpty())
 				{
 					for (ItemHolder ri : data.getItemsRequired())
 					{
@@ -824,7 +824,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 					}
 				}
 				// Give possible rewards.
-				if (data.getItemsRewarded().size() > 0)
+				if (!data.getItemsRewarded().isEmpty())
 				{
 					for (ItemHolder ri : data.getItemsRewarded())
 					{
diff --git a/L2J_Mobius_3.0_Helios/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java b/L2J_Mobius_3.0_Helios/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
index 3a94ac7bfb..9524d9bafb 100644
--- a/L2J_Mobius_3.0_Helios/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
+++ b/L2J_Mobius_3.0_Helios/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
@@ -379,7 +379,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 					if (data != null)
 					{
 						// Required items.
-						if (data.getItemsRequired().size() > 0)
+						if (!data.getItemsRequired().isEmpty())
 						{
 							for (ItemHolder ri : data.getItemsRequired())
 							{
@@ -395,7 +395,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 							}
 						}
 						// Give possible rewards.
-						if (data.getItemsRewarded().size() > 0)
+						if (!data.getItemsRewarded().isEmpty())
 						{
 							for (ItemHolder ri : data.getItemsRewarded())
 							{
@@ -808,7 +808,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 			if (data != null)
 			{
 				// Required items.
-				if (data.getItemsRequired().size() > 0)
+				if (!data.getItemsRequired().isEmpty())
 				{
 					for (ItemHolder ri : data.getItemsRequired())
 					{
@@ -824,7 +824,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 					}
 				}
 				// Give possible rewards.
-				if (data.getItemsRewarded().size() > 0)
+				if (!data.getItemsRewarded().isEmpty())
 				{
 					for (ItemHolder ri : data.getItemsRewarded())
 					{
diff --git a/L2J_Mobius_Classic_2.0_Saviors/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java b/L2J_Mobius_Classic_2.0_Saviors/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
index 9aa6a9cc5e..0c4c4a6d44 100644
--- a/L2J_Mobius_Classic_2.0_Saviors/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
+++ b/L2J_Mobius_Classic_2.0_Saviors/dist/game/data/scripts/ai/others/ClassMaster/ClassMaster.java
@@ -347,7 +347,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 					if (data != null)
 					{
 						// Required items.
-						if (data.getItemsRequired().size() > 0)
+						if (!data.getItemsRequired().isEmpty())
 						{
 							for (ItemHolder ri : data.getItemsRequired())
 							{
@@ -363,7 +363,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 							}
 						}
 						// Give possible rewards.
-						if (data.getItemsRewarded().size() > 0)
+						if (!data.getItemsRewarded().isEmpty())
 						{
 							for (ItemHolder ri : data.getItemsRewarded())
 							{
@@ -776,7 +776,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 			if (data != null)
 			{
 				// Required items.
-				if (data.getItemsRequired().size() > 0)
+				if (!data.getItemsRequired().isEmpty())
 				{
 					for (ItemHolder ri : data.getItemsRequired())
 					{
@@ -792,7 +792,7 @@ public final class ClassMaster extends AbstractNpcAI implements IGameXmlReader
 					}
 				}
 				// Give possible rewards.
-				if (data.getItemsRewarded().size() > 0)
+				if (!data.getItemsRewarded().isEmpty())
 				{
 					for (ItemHolder ri : data.getItemsRewarded())
 					{