How to detect 2d collisions?

We are working on a simple game which requires some basic collision detection and we have no idea on how to do that. Are there any tutorials available?

JOGL is 'only' a graphics binding for OpenGL. So JOGL has no collision detection, physics and so on.

But there are a lot of good libraries for collision detection and other game related things. I personally use Dyn4J (http://www.dyn4j.org) but you may also find LibGDX interesting. A lot of people have used jMonekyEngine (primarily a 3D engine) to do 2D games also.