How to capture a JFrame's close button click event?
Solution 1
import javax.swing.JOptionPane;
import javax.swing.JFrame;
/*Some piece of code*/
frame.addWindowListener(new java.awt.event.WindowAdapter() {
@Override
public void windowClosing(java.awt.event.WindowEvent windowEvent) {
if (JOptionPane.showConfirmDialog(frame,
"Are you sure you want to close this window?", "Close Window?",
JOptionPane.YES_NO_OPTION,
JOptionPane.QUESTION_MESSAGE) == JOptionPane.YES_OPTION){
System.exit(0);
}
}
});
If you also want to prevent the window from closing unless the user chooses 'Yes', you can add:
frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
Solution 2
Override windowClosing Method.
public void windowClosing(WindowEvent e)
It is invoked when a window is in the process of being closed. The close operation can be overridden at this point.
Solution 3
This may work:
jdialog.addWindowListener(new WindowAdapter() {
public void windowClosed(WindowEvent e) {
System.out.println("jdialog window closed event received");
}
public void windowClosing(WindowEvent e) {
System.out.println("jdialog window closing event received");
}
});
Source: https://alvinalexander.com/java/jdialog-close-closing-event
Solution 4
This is what I put as a menu option where I made a button on a JFrame
to display another JFrame
. I wanted only the new frame to be visible, and not to destroy the one behind it. I initially hid the first JFrame
, while the new one became visible. Upon closing of the new JFrame
, I disposed of it followed by an action of making the old one visible again.
Note: The following code expands off of Ravinda's answer and ng
is a JButton
:
ng.addActionListener((ActionEvent e) -> {
setVisible(false);
JFrame j = new JFrame("NAME");
j.setVisible(true);
j.addWindowListener(new java.awt.event.WindowAdapter() {
@Override
public void windowClosing(java.awt.event.WindowEvent windowEvent) {
setVisible(true);
}
});
});
Solution 5
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
also works. First create a JFrame called frame, then add this code underneath.
Comments
-
alxcyl over 3 years
I want to call a method
confirmExit()
when the red close button of the title bar of a JFrame is clicked.How can I capture that event?
I'd also like to prevent the window from closing if the user chooses not to proceed.
-
hage about 12 yearsBut this does not execute the
confirmExit()
method as the OP would like it -
Russell about 12 yearsIt does the same thing though
-
alxcyl about 12 yearsNo, I don't want to simply close the program. I want to do something before it happens.
-
Russell about 12 yearsoh sorry, I didn't know that.
-
Earth Engine almost 10 yearsAlthough this is not the right answer, for someone who just want a simple solution this is useful. +1.
-
intcreator over 8 yearsWill this work if the user closes the application (for example, by hitting Cmd + Q on a Mac)? Does the class that implements this method have to declare
implements WindowListener
for this code to work? If so, it might be good to include that in the answer. Otherwise this is an elegant solution. -
DSlomer64 about 8 years"What I want to do is to call ...
confirmExit()
when [the X] is clicked." And the previous comment is unrelated to OQ. -
retrovius almost 6 years@brandaemon If you add this line of code to the top of your main() method "System.setProperty("apple.eawt.quitStrategy", "CLOSE_ALL_WINDOWS");" then it will call the windowListener when Cmd + Q is pressed on mac.
-
Stéphane Millien about 3 yearsThis is exactly the contrary, add
frame.setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
to have a control withconfirmExit
. -
AirOne about 2 yearsIf want the program to only close this frame and not entirely stop, use
frame.dispose()
instead ofSystem.exit(0)