please help: I have two menuitem in in my JFrame.. nodeGraph and nodeCalculator each of this menu item when click is suppose to validate a new JPanel on the JFrame.. But only one of the JPanel display on the JFrame.
Make sure you are adding the right thing when you click that button. Adding another calculator seems peculiar to me, but you might have more information that it is all right.
I shall move this discussion to our GUIs forum.