I was curious because I really want to make some 8-bit games and I want to know if java can do that just as good or better than others such as c++. A great example of a good 8-bit game I want to make is http://wootfu.com/beacon/.
Another question like this? ;D
If John Carmack thinks making Quake 3 in Java is totally feasible, then you can make anything just as good or even better in Java 
Java is good for small games becouse you can easily get games playble at web. You can make your game to applet and for purist you can make stand alone aplication with fullscreen.
Also, I think a bit difference between cpp and java can be ignored these days.
Java is ok… Check Minecraft if you want to see some java 8bit games. 
Forgive my ignorance, but what exactly do you mean by an “8-bit game”? Is that just a game that’s similar to those that were available in the era of 8-bit computers?
Or maybe you’re programming for a phone or something that only has 8-bit registers?
It’s not any of my business, but I’m curious.
I believe he wants to do 8-bit graphics.