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.
Ever seen a jumpy GridBagLayout? Ever wonder why? This demo code explains it, and tracks root cause. The code to reproduce is self-explainitory. The first class is the one that demos the problem. The second is a utility class I use in the first, and is not relevant to the problem.