How do i display a confirmation message when the user clicks on the red cross? Java GUI

Question

I'm working on Java and I'm trying to display a confirmation message to the user when he wants to exit but I didn't know where I have to put it exactly. may you help me?

score 3 · Answer 1 · answered Dec 17 '13 at 11:57

3

You can stop frame from closing by default by using WindowConstants.DO_NOTHING_ON_CLOSE as peram to below API

frame.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
        this.addWindowListener(new WindowAdapter() {
            /* (non-Javadoc)
             * @see java.awt.event.WindowAdapter#windowClosing(java.awt.event.WindowEvent)
             */
            @Override
            public void windowClosing(WindowEvent e) {
                //Use JOptionPane. If everything goes fine 
                                //then do frame.dispose();

            }


        });

answered Dec 17 '13 at 11:57

Sachin

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Sorry but could you tell me what @override mean? I've never used that character @ in **Java** – user3102872 Dec 17 '13 at 13:51
@user3102872: You will get detailed answer in this link http://stackoverflow.com/a/94411/814074 – Sachin Dec 19 '13 at 08:14

score 2 · Answer 2 · edited May 23 '17 at 10:32

2

If your exit is being done by pressing the x button on the window then you need to handle the windows events.

To get the confirmation message you need to pop up a JOptionPane.

There is a discussion of a number of ways to handle the window closing here:

How can a Swing WindowListener veto JFrame closing

Documentation on JOptionPane is here:

http://docs.oracle.com/javase/7/docs/api/javax/swing/JOptionPane.html

edited May 23 '17 at 10:32

Community

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answered Dec 17 '13 at 11:55

Tim B

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The thing i didn't get is that: is it a method a have to create or a variable? it doesn't seem clear :\ Thank you, btw – user3102872 Dec 17 '13 at 14:25
A method. Methods do things, variables store data. (Sometimes you can effect the behavior of a Method by changing the value in a variable though). – Tim B Dec 17 '13 at 14:34

score 1 · Answer 3 · answered Dec 17 '13 at 11:59

1

Add a WindowListner to your JFrame and override windowClosing method and do a pop-up with JOptionPane warning user.

answered Dec 17 '13 at 11:59

Anirban Nag 'tintinmj'

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How do i display a confirmation message when the user clicks on the red cross? Java GUI

3 Answers3