What games can a Z600 play?

Ok, I'm kinda new to this, so please try not to flame me if I say something stupid..I have tried the FAQ section already, but nothing really helped me, although what I want to know is fairly simple...

Basically, what 'type' of games can the SE Z600 play?
I wanted to download some, except the ones I find are usually Java games....Except I read that the Z600 takes Mophun games only? I don't want to pay to download a game which doesn't work on my phone that's all

So I'm just wondering,
1). Are mophun and java games the same thing? If not, what are the differences?
2). Can I play Java games on my Z600? If so, are ALL Java games accepted? or are there different kinds for different phones? (i.e. Yucky Nokia ones)

Thank you very much for your help, thanks in advance!!!

Cheers