In particular, your display name must be a first and a last name separated by a space character, and must not be obviously fictitious.
My apologies, new guy and all that.. fixed.
Libs like
J0GL,
LWJGL, and
Java3D use OpenGL for hardware acceleration which imho is the way to go if you want performance.
Since you're working on a pin-ball game I'd gather you'll need some physics libs -- there's a
Java ODE binding available.
My current favorite opensourced Java engine is
jME -- they have a physics engine as well.