This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
You can use a MouseListener if you're interested in responding to mouse events. Usually you don't want that on a JButton, because "pressing" a button is more complicated than just clicking on it. For instance, you can activate it using the keyboard.