Update to Java 10.

L2J_Mobius_CT_2.6_HighFive/dist/game/config/ScriptEngine.ini

@@ -1,25 +1,9 @@
 ###############################################################################
 # Properties retrived with System.getProperty(String) can be used as values
 # by enclosing the property name with %. Eg.: %java.class.path%
-#
-# You can set a property for a scripting engine by language name.
-#
-# Examples:
-# language.Java.source=1.8
 ###############################################################################
 
 
-#######################################
-# L2J_JavaEngine #####################
-#######################################
-
-# The prefered java compiler api to use. 
-# The value is a fully qualified name of a class which implements the javax.toold.JavaCompiler and has a zero argument constructor. 
-# When the prefered compiler is not set, the first found compiler is used. 
-# When the prefered compiler is not found, the last found compiler is used.
-language.Java.preferedCompiler=com.sun.tools.javac.api.JavacTool
-language.Java.preferedCompiler=org.eclipse.jdt.internal.compiler.tool.EclipseCompiler
-
 # The parent class loader for isolated script class loaders. 
 # When this property is not specified, has an invalid value or is a class name which could not be found, the System classloader is used.
 # Values: System, ThreadContext or a fully qualified java class name

L2J_Mobius_CT_2.6_HighFive/dist/game/data/scripts/ai/areas/Gracia/GraciaLoader.java

@@ -100,7 +100,7 @@ public final class GraciaLoader
 		{
 			try
 			{
-				script.newInstance();
+				script.getDeclaredConstructor().newInstance();
 			}
 			catch (Exception e)
 			{

L2J_Mobius_CT_2.6_HighFive/dist/game/data/scripts/ai/areas/Hellbound/HellboundLoader.java

@@ -127,7 +127,7 @@ public final class HellboundLoader
 		{
 			try
 			{
-				final Object instance = script.newInstance();
+				final Object instance = script.getDeclaredConstructor().newInstance();
 				if (instance instanceof IAdminCommandHandler)
 				{
 					AdminCommandHandler.getInstance().registerHandler((IAdminCommandHandler) instance);