posted 9 years ago
hi James,
it's not enough to simply add a new class to your project, whether
you extend it to a JFrame, JPanel or not.
You have to specifically add "JFrame Form' or 'JPanel Form'. You can do this
when you right click your project or package in the project panel,
and choose for 'new'. There you see these options.
Greetz,
Piet
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