[JAVA3D] collision detection

[Nathanael Schwalbe]

Hi,   I'm writing a little car racing game and I need to know when my car finished the race. So I thougt when my car(a simple box) collides with the goal then the race is finished. But how can I find out with which object the car collides? For all other collisions it is not important to know which object the car hit so I used WakeuponCollisionEntry(Node). Do I have to use WakeuponCollisionEntry(SceneGraphPath) to find out the object I hit?   Thanks for all help! Nathanael