I suppose the noob tag is appropriate ie I was around sometime last
year and earlier but RLing got in the way of doing anything useful
with this lovely language.
Anyway, I've got this old project (https://github.com/doubleagent/
Magic--legacy- ) which I've recently gained a renewed interest in,
You might want to take a look at jMonkeyEngine (http://jmonkeyengine.org/)
It's a 3D java screengraph library with quite good performance.
I've found it to be fun to use in the past, and it has a good userbase
and lots of tutorials online.
Even if it's not what you want exactly, many people