Search:

Fair enough, but I personally believe a better way to help him would have been to point out why his program was wrong - or better yet, to simply ask him what happened when he ran it.

The only...

Hooray spoonfeeding :-/

Take a look at this tutorial to figure out how to get user input: How to Make Dialogs (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

When you have that part figured...