Originally Posted by
Kegsay
As far as I know it doesn't use java. Try running it in official windowed mode and see if it crashes then too.
As for it kicking you off the game in full screen mode, that's most likely because the error message stating that Java.exe has crashed popped up and most popups tend to kick you off which is really annoying. Open Task Manager and see if you can find it, and if so, force close it before running. It might be something as simple as you left a browser window open with a java game running.