[java] Questions about JME

I wouldn't say that it is too hard to learn. Just get some good tutorials/books.
No.
I don't know much about it's speed.
I would say it's ok with 2D.
I don't know if it comes with a physics engine but you might be able to find one with it and I think you would have to do your own collision detection.

1. Yes, it is very easy to learn.
2. No, in fact, they only support LWJGL for now. You should know how the underlying API works, though, as that would help you a lot while you're programming.
3. Very fast! And the devs are continually squeezing the best out of it in performance.
4. It integrates nicely with it, and it also supports AWT native components.
5. Yes, it has collision detection.
6. Yes, it includes a (good) physics engine.

Son Of Cain

Thanks guys. This engine sounds great. I am downloading it right now.