Originally Posted by
peter_budo 
I was under impression that repaint() is called only when you working explicitly with some graphical content (images, lines, shapes etc.)
Well, it is a "Graphical User Interface".
I was under the impression, however, that validate triggered a repaint, which is the reason I waited until the end to try it. Guess I was wrong. Not the first time, won't be the last time.
Java Programmer and Sun Systems Administrator
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Debugging is twice as hard as writing the code in the first place. Therefore, if you write the code as cleverly as possible, you are, by definition, not smart enough to debug it.
--Brian Kernighan