My program starts with a picture with a textfield in a JFrame. I want when the user types start it closes the picture JFrame and opens another JFrame with the main program. I've tried
processEvent(new WindowEvent(this, WindowEvent.WINDOW_CLOSING));
JFrame.setVisible can be used to hide or display the JFrame based on the arguments, while
JFrame.dispose will actually "destroy" the frame, by closing it and freeing up resources that it used. Here, you would call
setVisible(false) on the picture frame if you intend to reopen it, or call
dispose() on the picture frame if you will not be opening it again, so your program can free some memory. Then you would call
setVisible(true) on the main frame to make it visible.