Forge not launching with start.command file need help on mac

[ScoobyDo]

I have being doing research and can't find any solutions but when i run forge alone it works but I need more ram  for the server and this error pops up when I try to run the start.command script that I have found. anyone know how to help I have tried 1.7.10 and 1.12 and both with same problem. any help and possible solutions would be great.

 

Script Code:

 

#!/bin/sh

cd "$( dirname "$0" )"
java -Xms3G -Xmx4G -jar forge.jar nogui -o true

 

 

Error:

 

Last login: Mon Nov 13 01:53:09 on ttys001
iMac:~ adam$ /Users/adam/Desktop/Test\ Server\ copy/start_server.command ; exit;
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(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    at cpw.mods.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:43)
    at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:12)
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
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

[Process completed]

 

[ScoobyDo]

I was using Java 8, tried java 7 but the same problem comes up what version should i be trying to use?

Edited November 13, 2017 by ScoobyDo
wasn't finished

[LexManos]

Java 8, also you wont have the same error on J8 because this is a J9 only error.

[ScoobyDo]

that error was on J8

[ScoobyDo]

Well i can get a again

 

error:

 

Last login: Mon Nov 13 21:32:28 on ttys000

iMac:~ adam$ /Users/adam/Desktop/Project\ OZone/start_server.command ; exit;

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(NativeMethodAccessorImpl.java:62)

at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.base/java.lang.reflect.Method.invoke(Method.java:564)

at cpw.mods.fml.relauncher.ServerLaunchWrapper.run(ServerLaunchWrapper.java:43)

at cpw.mods.fml.relauncher.ServerLaunchWrapper.main(ServerLaunchWrapper.java:12)

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

logout

Saving session...

...copying shared history...

...saving history...truncating history files...

...completed.

 

[Process completed]

 

Java version:

JDK 8u151

[ScoobyDo]

ok i will look into how to into install J9

[ScoobyDo]

ops meant uninstall J9. also should i be opening the file with Jar launcher