Why wont setText() work?

I created an ActionEventListener for a button in one of programs and after if(clickmeButton.equals(what) {
I put: HelloAgainLabel.setText("response") but the Label wont change. Why is that?

Are you sure that you're getting to the code that sets the text? If so then try this: Add these 3 lines right after the setText call:
HelloAgainLabel.invalidate();
HelloAgainLabel.validate();
HelloAgainLabel.repaint();
That will force an immediate repaint on the label.

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