I edited the original question to avoid confusion.
http://docs.oracle.com/javase/tutorial/uiswing/components/rootpane.html
Type: Posts; User: JonLane
I edited the original question to avoid confusion.
http://docs.oracle.com/javase/tutorial/uiswing/components/rootpane.html
(Credit: Copeg has given good insight so far, and primarily offered the layout manager wrapper trick, which does work!)
EDIT: I have decided that Copeg's solution isn't really a hack, and is common...