[pjbringer]

In your specific case, you could just just grab all the classes in a big list [1], and pick at random from them.

You don't need to do much to figure out the url from the names, so it's really only the list of names you need.

[1] http://docs.oracle.com/javase/7/docs/api/allclasses-frame.ht...

[g123g]

Yes, I could do that but I just wanted to check if there is already some service that does this.

I think this could be a nice side project - A daily reminder service to go over a subset of some content.