Error while Exiting Jframe window

Question

I have one window of class Jframe and it contains one button. On Clicking that button the second window of class Jframe is opened. On Clicking the close or the exit button of second window then the first window is also closed along with second window. Why is this happening?

below is my code : // this is my first file

class Frame1 extends JFrame
{
Frame1()
{
        super("hello this is window 1");
        setVisible(true);
        setSize(400,400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());
        JButton btn = new JButton("open second window");
       btn.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent e) {
                System.out.println("button clicked");
                Frame2 obj2 = new Frame2();
        }
    });
    add(btn);
}

public static void main(String args[])
{
        Frame1 obj = new Frame1();
}
}

// this is my second file
class Frame2 extends JFrame
{
Frame2()
{
        super("hello this is window 2");
        setVisible(true);
        setSize(400,400);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());
}
}

what is the problem, what is the Error? and post your code please to get help. — Salah, Mar 14 '14 at 13:16
when i click on exit button of one window then second window is also exited with one window. i don't have the code for exiting. it is automatically done. — Sarthak Shah, Mar 14 '14 at 13:18
@SarthakShah: Without seeing the code that produces the problem, it is very hard to try and determine what the problem is. Please post the code in question. — unholysampler, Mar 14 '14 at 13:19

score 2 · Answer 1 · edited May 23 '17 at 12:14

Try changing the default close event (which quits the program) and then close that one JFrame explicitly.

frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));

Some links that might help:

http://tips4java.wordpress.com/2009/05/01/closing-an-application/
http://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html
https://stackoverflow.com/a/1235283/2407870

score 1 · Answer 2 · answered Mar 14 '14 at 13:20

1

Change the Value of the setDefaultCloseOperation() parameter to JFrame.DO_NOTHING_ON_CLOSE to prevent the second Frame from closing the First Frame

answered Mar 14 '14 at 13:20

LightningAlways

11
3

score 1 · Accepted Answer · answered Mar 14 '14 at 13:33

Try to add window listener in the second frame, then just dispose it, something like:

frame2.addWindowListener(new java.awt.event.WindowAdapter() {
    @Override
    public void windowClosing(java.awt.event.WindowEvent windowEvent) {
        frame2.dispose();
    }
});

OR

frame2.setDefaultCloseOperation (JFrame.DISPOSE_ON_CLOSE);

But note that its not a good practices to use multiple JFrame's in you're application, use one JFrame and multiple Dialogs.

score 1 · Answer 4 · answered Mar 14 '14 at 13:53

1

Remove this line from your Frame2 class

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Then add this to the same line:

setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);

answered Mar 14 '14 at 13:53

AloneInTheDark

938
4
15
36

Error while Exiting Jframe window

4 Answers4