how do you access the framebuffer?
Making a FrameBuffer object.
See the demos, feel the demos, be the demos.
I'm not trying to be rude here, this is meant to be constructive criticism. You might be in over your head. Maybe you should try some easier programs for awhile. 3D programming is not a good way to learn Java and you are showing by your questions that you don't know Java yet. Myself and others have posted a lot of good information about how to get started with Java and JPCT, yet you don't seem to follow the instructions. Maybe I'm wrong...
Good Luck :) ,
Jim