I don't really need a solution, just answer - some Swing insight. So I have a panel, and a list on it. The list is populated with strings. The problem is the following: If I add the list elements too fast, I end up with different kinds of strange windows. However, after introducing a sleep(100), or another function call, it surprisingly works fine. I didn't believe this was the problem, so I added and removed the sleep several times. It solved the glitch 10/10.
How? Why? Ideas and guessings are welcome as well.
Swing lib use threading to Draw as you may knew , can you please post the code .
It's kind of confidential. I just hoped someone came across the same issue . Actually it's nothing special about the code. It's not multi-threaded, I just add several entries to the list.
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. Actually it's nothing special about the code. It's not multi-threaded, I just add several entries to the list. 
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