JComboBox is throwing a NullPointerException when told to addItemListener()?

You need to initialize the listOfWindTurbines variable, for example: JComboBox listOfWindTurbines = new JComboBox().

Thanks so much! – Shaken_Earth Mar 19 at 17:23.

Add(String) on a null object, which cases a NullPointerException. Fixing those issues will make your code work, but there's one last problem. Vector is a somewhat outdated class, and it has been replaced by the Java Collections API.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.

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