SetText() works for one text area but not for another

I am student new to java so forgive me if I'm making an obvious mistake. I have a GUI with 3 tabs. Two tabs have a text area in each in them and an action listener tells the textarea what to print. The problem is one text area works and the other doesn't. they are declared in the same way so I can't see why the problem occurs.

If you have copied and pasted code for the second one, it is possible that you are setting text for the first text area at both the places. Check if you are calling the setText method on both the text areas and not the same one twice.

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