Programmer wants to make games.

I've been taking Computer Science classes for the past couple years so I can already program in Java. I want to tool around and make games for the rest of the summer, but I don't know where to start. What language/IDE/library should I use? I just want to make 2d platformy action games and such.

>>10
It saddens me to know that most people on/prog/ sincerely thinks this.