The Dev has decided that collision checking and physics would be best handled by the Java port of the great physics engine Box2D. To effect this, the Dev has written a small demo program which uses jBox2D to simulate balls and boxes,and then renders the results with Java2D.
My analysis indicates good progress, and the Dev should soon be able to integrate jBox2D into Glass Flame. Please note that the Dev did not write Box2D, nor did he help in the porting to Java. The demo program is a demo of his ability to use jBox2D.
If you would like to try the demo program, ask in a comment.