> Why would my friend get an "expection in thread #" if
> # represented the main class file which should be
> executed when he goes to a java program?
Your previous posts would tend to suggest that you understand what you need to post to actually get help here.
This post is insufficient.
I suggest you tell your friend that they are not providing you with enough information to help them (which I would suspect is why you posted so little this time.)
And if the code is not yours but a game then you tell your friend that they must ask the vendor/owner of the game to help.