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Have you import the correct packages?

Try adding super() as the first line in your constructor and just see if that works

F6 runs the project, shift+F6 runs the individual class/java file. But that's not your issue it's asking for a super method in the constructor I think judging on that error message, although I didn't...

Have you made sure netbeans knows this is the main class it needs to run? Its in the project properties, under the "run" tab you can select which class you want netbeans to run. Or just try shift+F6...