There are a few tiny things that annoy me about Java, and it's basicly desktop integretion.
For instance, any Java file, .class, .java, .jar, .war etc. has no association with my windows. Windows doesn't recognize these files, and they have this silly wordpad document icon, or winrar icon at my home pc.
And those jar files, you dont have a clue what's in them. Is it a library? An gui application? A console application? In my opinion Sun needs new standardized file format for GUI Application, or Console Application, or Java Library - AND THEY SHOULD HAVE ICONS!!
Seriously, people like to be able to recognize things by associating the icon of them with something, you shouldn't have to have a folder of 100 jar files, and don't know what type of jar files they are! I had to manually associate jar files to a java icon, something a normal user couldn't do.
Oh well, just little things like that, something trivial, but still Sun hasn't figured it out.
Let's face it, if a user can't manually associate icons to apps, then they shouldn't be mucking around with anything in the file system to begin with. I understand it's an annoyance in your particular case but for the average user who will running a game developed in Java, they, more than likely, will never delve into the file structure anyway. The only icons that 99% of home computer users care about is what is in their start tree and on their desktop.