This is my first 'game' in Java. I have a background of mostly C and C++, and haven't used Java since back in college. Despite that, LWJGL was really easy to get up and running. It's a nice interface to OpenGL.
My programming plans were shortened by Thanksgiving here in the States, so this isn't as finished as I was hoping for it to be. I think it still qualifies for the 'moving box' criteria though :-) Right now it's just an overactive 2d verlet sim, mostly.
Packaged .zip (.jar+.sh+.bat) is here
. The .sh is untested, but should work as long as java is in your path.
I also put up an applet
, although I'm not sure if it works - I seem to have screwed up the Java browser plugin on my computer. Let me know if it runs for you.