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.
I have a small JPanel using a null layout manager. When I add it directly to a JFrame, it is visible. When I add it to another null layout JPanel it is visible. When I add it to a JPanel with the default layout it does not show up.