Forge minecraft 1.12.2

[jojodi974]

Hello I'm using ubuntu 18.04 and i would like to install forge on my minecraft launcher. I've already downloaded and install the last version of forge but when I launch minecraft there's a message error :

OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Unrecognized VM option 'CMSIncrementalMode'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

After deleting "CMSIncrementalMode" in "JVM arguments", I launch a second time and I have a new message error :

OpenJDK 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Exception in thread "main" 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.j ava:34)
at net.minecraft.launchwrapper.Launch.main(Launch.jav a:28)

Could you help me ? Sorry if my english is approximate. Thanks.

[CatKiller]

Minecraft (and especially mods) really wants Java 8, and the one from Oracle in particular. There is a PPA that has it.

[jojodi974]

Thanks it works, I love you so much ! Have a nice day !

[oldrocker99]

Minecraft (and especially mods) really wants Java 8, and the one from Oracle in particular. There is a PPA that has it.

And here it is: https://launchpad.net/~webupd8team/+archive/ubuntu/java

[wildmanne39]

Glad it worked, please use thread tools at the top of the page to mark the thread solved.

Thanks

[yaboyneedhelp]

I'm Having the same problem and i already downloaded java jre 8 form oracle like as what i saw on another post plz respond