The jMonkeyEngine is pretty popular for the graphics side of things.
The Light Weight Java Game Library is another option which has both OpenAL and OpenGL wrappers but it is very light and might need extra wrapping on your part to turn into "proper" Javaesque code.
Frankly though native extensions in Java are sure fire way to pain and agony. I'd rather learn a new language than try and work with some of that stuff.
Looked into JOGL and JOAL ?