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@rougeking: thanks for removing the code. My first thought when I see something full of typos is to say "Here, do it like this..." but I'm convinced of the futility of this approach as it...

The link Norm provided only requires you to choose your operating system. It is written with JDK 7 in mind.

Those red squiggly things in the screen shots are compiler messages indicating a problem with the code. They all have to be fixed, which is not has hard as it might seem.

I agree with Norm, if...

JFrame has a no-arg constructor.

The problem here is that the code, as posted, will not compile. Consequently NB's verifier is going to grumble about whatever (old) class files it is looking at. ...

Compile your code before you attempt to run it. What you posted won't compile and the compiler's message will be useful.