confirmation before press YES to exit program in Java

Question

private void windowClosing(java.awt.event.WindowEvent evt)                               
    {                                   
        int confirmed = JOptionPane.sh         


        

Answer 1

addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent evt){
                int x = JOptionPane.showConfirmDialog(null, 
                    "Are you sure you want to exit ?", "Comform !",
                    JOptionPane.YES_NO_OPTION);

                if(x == JOptionPane.YES_OPTION) {
                    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                }else{
                    setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
                }
            }
        });

Chek this.