prefer isEmpty over length() == 0

src/main/java/appeng/core/features/registries/InscriberRegistry.java

@@ -178,7 +178,7 @@ public final class InscriberRegistry implements IInscriberRegistry
 			{
 				throw new IllegalStateException( "Input must be defined." );
 			}
-			if( this.inputs.size() == 0 )
+			if( this.inputs.isEmpty() )
 			{
 				throw new IllegalStateException( "Input must have a size." );
 			}

src/main/java/appeng/core/features/registries/WirelessRegistry.java

@@ -94,7 +94,7 @@ public final class WirelessRegistry implements IWirelessTermRegistry
 
 		final IWirelessTermHandler handler = this.getWirelessTerminalHandler( item );
 		final String unparsedKey = handler.getEncryptionKey( item );
-		if( unparsedKey.length() == 0 )
+		if( unparsedKey.isEmpty() )
 		{
 			player.addChatMessage( PlayerMessages.DeviceNotLinked.get() );
 			return;