diff --git a/runelite-client/src/main/java/net/runelite/client/game/ChatboxInputManager.java b/runelite-client/src/main/java/net/runelite/client/game/ChatboxInputManager.java
index 218f64f237..ec8905e380 100644
--- a/runelite-client/src/main/java/net/runelite/client/game/ChatboxInputManager.java
+++ b/runelite-client/src/main/java/net/runelite/client/game/ChatboxInputManager.java
@@ -126,7 +126,7 @@ public class ChatboxInputManager
 					isDone = true;
 					break;
 				case '\b':
-					if (str.length() > 0)
+					if (!str.isEmpty())
 					{
 						str = str.substring(0, str.length() - 1);
 					}
diff --git a/runelite-client/src/main/java/net/runelite/client/game/chatbox/ChatboxTextInput.java b/runelite-client/src/main/java/net/runelite/client/game/chatbox/ChatboxTextInput.java
index 164710bf7c..e340027d1a 100644
--- a/runelite-client/src/main/java/net/runelite/client/game/chatbox/ChatboxTextInput.java
+++ b/runelite-client/src/main/java/net/runelite/client/game/chatbox/ChatboxTextInput.java
@@ -274,7 +274,7 @@ public class ChatboxTextInput extends ChatboxInput implements KeyListener, Mouse
 		leftText.setOriginalHeight(h);
 		leftText.revalidate();
 
-		if (mt.length() > 0)
+		if (!mt.isEmpty())
 		{
 			cursor.setTextColor(0x113399);
 		}
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/achievementdiary/DiaryRequirementsPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/achievementdiary/DiaryRequirementsPlugin.java
index eea28e1ed2..ee77f19ecc 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/achievementdiary/DiaryRequirementsPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/achievementdiary/DiaryRequirementsPlugin.java
@@ -274,7 +274,7 @@ public class DiaryRequirementsPlugin extends Plugin
 			StringBuilder b = new StringBuilder();
 			b.append("<col=ffffff>(");
 
-			assert req.getRequirements().size() > 0;
+			assert !req.getRequirements().isEmpty();
 			for (Requirement ireq : req.getRequirements())
 			{
 				boolean satifisfied = satisfiesRequirement(ireq);
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/cluescrolls/clues/HotColdClue.java b/runelite-client/src/main/java/net/runelite/client/plugins/cluescrolls/clues/HotColdClue.java
index 56e5be4e97..3585d08ba3 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/cluescrolls/clues/HotColdClue.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/cluescrolls/clues/HotColdClue.java
@@ -284,7 +284,7 @@ public class HotColdClue extends ClueScroll implements LocationClueScroll, Locat
 	{
 		this.location = null;
 
-		if (digLocations.size() == 0)
+		if (digLocations.isEmpty())
 		{
 			digLocations.addAll(Arrays.asList(HotColdLocation.values()));
 		}
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/demonicgorilla/DemonicGorillaPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/demonicgorilla/DemonicGorillaPlugin.java
index 76e240afca..0e9660b918 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/demonicgorilla/DemonicGorillaPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/demonicgorilla/DemonicGorillaPlugin.java
@@ -159,7 +159,7 @@ public class DemonicGorillaPlugin extends Plugin
 		final DemonicGorilla.AttackStyle... protectedStyles)
 	{
 		if (gorilla.getAttacksUntilSwitch() <= 0 ||
-			gorilla.getNextPosibleAttackStyles().size() == 0)
+			gorilla.getNextPosibleAttackStyles().isEmpty())
 		{
 			gorilla.setNextPosibleAttackStyles(Arrays
 				.stream(DemonicGorilla.ALL_REGULAR_ATTACK_STYLES)
@@ -259,7 +259,7 @@ public class DemonicGorillaPlugin extends Plugin
 				.filter(x -> x == attackStyle)
 				.collect(Collectors.toList()));
 
-			if (gorilla.getNextPosibleAttackStyles().size() == 0)
+			if (gorilla.getNextPosibleAttackStyles().isEmpty())
 			{
 				// Sometimes the gorilla can switch attack style before it's supposed to
 				// if someone was fighting it earlier and then left, so we just
@@ -381,7 +381,7 @@ public class DemonicGorillaPlugin extends Plugin
 									// so we assume it was the gorilla who shot it
 									onGorillaAttack(gorilla, DemonicGorilla.AttackStyle.BOULDER);
 								}
-								else if (mp.getRecentHitsplats().size() > 0)
+								else if (!mp.getRecentHitsplats().isEmpty())
 								{
 									// It wasn't any of the three other attacks,
 									// but the player took damage, so we assume
@@ -581,7 +581,7 @@ public class DemonicGorillaPlugin extends Plugin
 					// Player went out of memory, so assume the hit was a 0
 					shouldDecreaseCounter = true;
 				}
-				else if (target.getRecentHitsplats().size() == 0)
+				else if (target.getRecentHitsplats().isEmpty())
 				{
 					// No hitsplats was applied. This may happen in some cases
 					// where the player was out of memory while the
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/devtools/WidgetInspector.java b/runelite-client/src/main/java/net/runelite/client/plugins/devtools/WidgetInspector.java
index c0ccdd1384..cea9a2b9c1 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/devtools/WidgetInspector.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/devtools/WidgetInspector.java
@@ -278,7 +278,7 @@ class WidgetInspector extends JFrame
 
 	static WidgetInfo getWidgetInfo(int packedId)
 	{
-		if (widgetIdMap.size() == 0)
+		if (widgetIdMap.isEmpty())
 		{
 			//Initialize map here so it doesn't create the index
 			//until it's actually needed.
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/fairyring/FairyRingPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/fairyring/FairyRingPlugin.java
index 711d9542a1..644c05859b 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/fairyring/FairyRingPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/fairyring/FairyRingPlugin.java
@@ -302,7 +302,7 @@ public class FairyRingPlugin extends Plugin
 			String code = Text.removeTags(c.getDescription().getName()).replaceAll(" ", "");
 			String tags = null;
 
-			if (code.length() > 0)
+			if (!code.isEmpty())
 			{
 				try
 				{
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/kourendlibrary/KourendLibraryOverlay.java b/runelite-client/src/main/java/net/runelite/client/plugins/kourendlibrary/KourendLibraryOverlay.java
index 63bd1978c2..3c6863af3a 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/kourendlibrary/KourendLibraryOverlay.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/kourendlibrary/KourendLibraryOverlay.java
@@ -133,7 +133,7 @@ class KourendLibraryOverlay extends Overlay
 				Color color = bookIsKnown ? Color.ORANGE : Color.WHITE;
 
 				// Render the poly on the floor
-				if (!(bookIsKnown && book == null) && (library.getState() == SolvedState.NO_DATA || book != null || possible.size() > 0))
+				if (!(bookIsKnown && book == null) && (library.getState() == SolvedState.NO_DATA || book != null || !possible.isEmpty()))
 				{
 					Polygon poly = getCanvasTilePoly(client, localBookcase);
 					if (poly != null)