This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Here is some code (modified for this example) that I wrote when I was first learning about extends keyword. And action listeners, and inner classes. It uses AWT only, but you should easily modify it to use Swing.
[This message has been edited by Mike Curwen (edited May 02, 2001).]