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It looks like you're still trying to use NetBean's generated code, and I strongly urge you to move away from this. Create your code by hand which will allow you to create a very small runnable Swing...

I second Norm's recommendations. If you need our help, post code that we can run, that doesn't have a ton of code unrelated to the problem. It should contain maybe 40 to 150 lines and not hundreds of...

I think that you should post more. Consider creating and posting an SSCCE where you condense your code into the smallest bit that still compiles and runs, has no outside dependencies (such as need to...

What user interface are you using? Is this a Swing or AWT GUI program? Where is input obtained from the user?

I'm not sure that I can help based on what you've posted so far. You should use your println statements to help debug and isolate your error. Then if still stuck, post the new code and any new...