The new setExtendedState API is more robust and included supports for maximizatiom. Furthermore if Maximization is not available on a platform then this functionality should be disabled. Check with java.awt.Toolkit.isExtendedState(Frame.MAXIMIZED_BOTH). In the case of Solaris/CDE this returns false.

The attached program shows that maximize and minimize do not work on Solaris/CDE. Maximize should be disabled and minimize should work.