Sorry to answer only now. Java3D was resurrected last year, the next stable release will be out in some months but it won't get any new features and it's still difficult to get some help. You can ask questions about Java3D on the official JogAmp Java3D forum
. If I were you, I would rather convert the Blend files into Collada or another animation format and use an importer for Java3D.
wreed12345 is a bit right. Instead of talking about Unity, maybe you should look at other 3D engines written in Java, for example Ardor3D (small community, active, very reliable), JMonkeyEngine (very large community, very active), Xith3D (very close to Java3D, in maintenance mode but I'm not sure whether the project is still active), 3DzzD, ...