help needed in java

hey guys, thought i might get some help on this java project,
i have attached java source files, iam using JInternalFrame and JDesktopPane, the problem iam having is i cannot display panels in the internal frames, there seems to be no error, i got no idea why it wont display

hope someone can answer this :(

sorry here is the attachment

Hallo Wild Wolf!

I think it is more a problem with your GraphAlgorithm class or its component, because if you add e. g. a JButton to your JPanel 'fieldPanel' in the MyInternalFrame2 class, it will display the panel with the button.

Good luck!

Hajü