LaunchWrapper fails on Java 9.

[dscalzi]

Issue when loading:

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.java:34)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

Location in code:
https://github.com/Mojang/LegacyLauncher/blob/master/src/main/java/net/minecraft/launchwrapper/Launch.java#L34

[kashike]

#11

[FinnT730]

Can I say one thing?
Look at the last commit! And this is the old Minecraft launcher!!

(If I don't repay to this, it doesn't mean I dislike the feedback or anything, but I get like 200+ mail's of github, and I don't even look in my Github inbox anymore!)

[liach]

@FinnT730 Go to your user settings to fix the mails. You can let github only send mails about those threads that you actually participated in.

[SeasonalFerret]

Issue seems to persist on Java 10.

[liach]

As long as the module system is there, the issue exists.

[mjrb]

I found a temporary fix, you can manually download and unzip jre8 and if you enable advanced options in the launcher you can specify the path to java. you give it <path to unziped jre8>/bin/java. this worked for me when I was trying to use forge for minecraft 1.10 on ubuntu 18.04

[elouejmajdi]

rsist on Java 10.

I got the same issue when I use JDK 12

[dscalzi]

This project won't support versions later than Java 8. Use modlauncher with the latest versions of minecraft.

[DesertCookie]

This issue seems to also appear on Eclipse Temurin JDK 1.8:

java.lang.NullPointerException: null
	at java.lang.Class.forName0(Native Method) ~[?:1.8.0_392]
	at java.lang.Class.forName(Class.java:348) ~[?:1.8.0_392]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:131) [launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]