Server-side language

Hello, everyone.

This year I have a coursework. I should write a server for a computer game. Now I decide what language I use.

I have been programming on Java for four three already and I like it, but I don't want to restrict my intellection.

I was offered Ruby and Python, but I don't realy like them (change my mind).
I would try Scala or Erlang, but I heared they are realy hard to study.

What language could you recomend me and why?
What language can give me more profit and experience?
Or maybe it's better to use Java?

P.S. Please, do not offer me .Net languages.
P.S.S. Sorry for my english.

In my home country, this is Nara of Japan, russian hacker

1. delete stuff everything

2. lying to administrator

3. spit to face when hacking, mouth smell bad

4. don't have money, many russian hacker, hole in cloths and dirty pants, old shoes

5. raping? jap girl because jap girl say russian boy no thanks, very ugly and jew

6. very smell of food eating by russian

7. very smell of body, no bath long time, sometime 10 days?

russian=hacker same