Forge 1.10.2 Error

[Styxx]

I'm trying to setup a server for my friends and I, but I keep getting this error.
I looked at libraries, and some of them had 1.12.2 written in their names, could that cause these issues?

C:\Users\----\Desktop\Modded Server>java -Xmx8192M -Xms8192M -jar forge-1.10.2-12.18.3.2511-universal.jar nogui
A problem occurred running the Server launcher.java.lang.reflect.InvocationTargetException
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.base/java.lang.reflect.Method.invoke(Unknown Source)
        at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:62)
        at net.minecraftforge.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:31)
Caused by: java.lang.ClassCastException: java.base/jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to java.base/java.net.URLClassLoader
        at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
        at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
        ... 6 more

Tangent cause why not; Why is there JavaScript support and not standard Java for something written in Java?

Edited April 22, 2018 by Styxx

[DaemonUmbra]

What version of Java do you have installed? Forge requires Java 8, not 9.

[Styxx]

I have the JDK for both installed, would that cause issues?

[Styxx]

Reinstalled with new Java 8 version, server worked.

Close thread.