Closing single JFrame not working bug

Question

I decided to put "close" buttons on my JFrames. If I test just that JFrame by itself, it works fine, but when I try to close it after opening it through another class, it won't close.

Here is the code:

JButton btnClose = new JButton("Close");
btnClose.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent arg0) {
        frame.dispose();
    }
});
btnClose.setBounds(282, 666, 96, 50);
contentPane.add(btnClose);

I have tried using frame.dispose() and frame.close() and super.dispose() but the only one that works is system.exit(0); but then that exits the whole program.

The issue:

If I test the JFrame by itself, the frame closes fine.
If I open the program and navigate to that specific JFrame, the close button does nothing.

Please advise.

"when I try to close it after opening it through another class,"- post code for this part — Rajesh, Oct 02 '13 at 17:21
Have you check if the execution arrive to that point of code? — angel_navarro, Oct 02 '13 at 17:21
For better help sooner, post an [SSCCE](http://sscce.org/). *"..that specific `JFrame`.."* See [The Use of Multiple JFrames, Good/Bad Practice?](http://stackoverflow.com/a/9554657/418556) — Andrew Thompson, Oct 02 '13 at 17:22
@Rajesh I am opening the JFrame from a class using the .visible(true);. then the class shows and that is it. — VaMoose, Oct 02 '13 at 18:49

score 1 · Answer 1 · answered Oct 02 '13 at 19:09

Did you add a display statement in the ActionListener to make sure the code is being executed?

If the code is being executed, then the problem is probably that the frame variable has in invalid reference.

You don't need to keep a reference to the frame. Instead use something like:

Window window = SwingUtilities.windowForComponent( e.getSource() );
window.dispose();

score 0 · Answer 2 · answered Oct 02 '13 at 17:34

0

Use setVisible(false); on the frame. Then call dispose.

answered Oct 02 '13 at 17:34

user489041

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Closing single JFrame not working bug

2 Answers2