This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Are you even getting a proper frame size to display? Is it blank? I think when drawing directly on a JFrame, as you are doing, one has to draw on a specific layer--a display layer of some sort which I can't recall off the top of my head. I'm more used to adding a JPanel to a JFrame, and putting the graphics on the JPanel rather than the JFrame.