Why running sudo to my own account fixes graphical problems in Swing GUI

My swing GUI application starts with a script.

When I run that script under Linux without sudo it gives me unexpected Look and feel and other graphical problems.

Why is running with sudo su to my own account fix开发者_JS百科es this problem?

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One might guess that the program is trying to make use of a file that has permissions that allow root to access it, but not your uid. Perhaps you have a library installed with wrong permissions?

strace will tell you what files your app is trying to access.