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I have a screenshot program I made, and for some reason it "draws" to the screen. It really does that thing that Windows likes to do(and I hate it) when it freezes up and you can see random crap like...

Pastebin not allowed? Okay then.

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: adding a window to a container
at java.awt.Container.checkNotAWindow(Unknown Source)...

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: addin - Pastebin.com is the error I am getting(It's a link, I see that this forums likes to replace the link with the title...

It works!
I tried it 10 times in a row, and everything worked, thank you!

BTW I'm quoting you :3

I found this bug bizarre, but #java just redirected me to ##java on freenode and they didn't help and I even asked on Stack Overflow, so I am asking here.
When I have this code:
...