close java frame using code [duplicate]

Question

Possible Duplicate:
How to programmatically close a JFrame

I am developing a java GUI using JFrame. I want to close the GUI frame and dispose it off through code. I have implemented :

topFrame.addWindowListener(new WindowListener()
        {
            public void windowClosing(WindowEvent e)
            {
                emsClient.close();
            }
            public void windowOpened(WindowEvent e) {
            }
            public void windowClosed(WindowEvent e) {
            }
            public void windowIconified(WindowEvent e) {
            }
            public void windowDeiconified(WindowEvent e) {
            }
            public void windowActivated(WindowEvent e) {
            }
            public void windowDeactivated(WindowEvent e) {
            }
        });`

How can I invoke the windowClosing event?? Or is there some other way?

Please look in below thread for the same purpose: stackoverflow.com/questions/258099/… — Phani
– Phani, Commented Apr 29, 2011 at 9:26

WhiteFang34 · Accepted Answer · 2011-04-29 09:27:47Z

18

This will programmatically trigger the window closing event:

topFrame.dispatchEvent(new WindowEvent(topFrame, WindowEvent.WINDOW_CLOSING));

If you want to close the frame you need to call:

topFrame.dispose();

answered Apr 29, 2011 at 9:27

WhiteFang34

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1 Comment

trashgod Over a year ago

See also this related Q&A regarding JDialog.

Lukasz · Accepted Answer · 2011-04-29 09:23:50Z

3

How about invoking dispose() method?

answered Apr 29, 2011 at 9:23

Lukasz

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1 Comment

WhiteFang34 Over a year ago

Just tried, dispose() doesn't trigger a window closing event. It does close the window though.

javing · Accepted Answer · 2011-04-29 09:24:51Z

2

You need this:

yourFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

You can add that line in the constructor(Dont forget it).

answered Apr 29, 2011 at 9:24

javing

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2 Comments

Lukasz Over a year ago

Well, I think the OP wants to close it programmatically.

javing Over a year ago

If so he just need to catch the event for closing and call dispose(). But i don't understand, why not just adding that method in the constructor. Some IDEs add it even automatically when creating a JFrame.

Andrew Thompson · Accepted Answer · 2011-04-29 09:37:41Z

2

import java.awt.event.*;
import javax.swing.*;

class CloseFrame {

    public static void main(String[] args) {

        Runnable r = new Runnable() {

            public void run() {
                JButton close = new JButton("Close me programmatically");
                final JFrame f = new JFrame("Close Me");
                f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                f.setContentPane( close );
                close.addActionListener( new ActionListener(){
                    public void actionPerformed(ActionEvent ae) {
                        // make the app. end (programatically)
                        f.dispose();
                    }
                } );
                f.pack();
                f.setLocationByPlatform(true);
                f.setVisible(true);
            }
        };

        SwingUtilities.invokeLater(r);
    }
}

answered Apr 29, 2011 at 9:37

Andrew Thompson

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2 Comments

trashgod Over a year ago

Excellent sscce, but it won't trigger the questioner's WindowListener; I'm guessing that was was the goal, based on the accepted answer.

Andrew Thompson Over a year ago

Just to go off-topic, thanks for adding the Mac. screen shot to the Nested Layout Example. :)

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