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In case the update is not obvious, so my update to post #4.

And as for your latest post, of course you can't declare the variable test to be of type TestScoresProgram when TestScoresProgram...

Show how you're calling it.

And if this is how the program is written in your book, including the name of the class not matching any call to instantiate it, the lack of a constructor, the variable...

So annoying. Variable names and method names begin with lowercase letters. Aren't they teaching this anymore?

Your GUI is built in TestScoresProgram(). I'd like to know why, but I'd also like...