How do I prevent a window from closing?

[evilone]

first sorry for my bad english.Hi, i'm trying to use a confirmDialog with a YES_NO_OPTION.what i want is that when i close a frame a confimDialog will be displayed asking me if want to close.if i press yes everyThing most be closed, if i press no the confirmDialog will disapearbut the problem is even if i press no button the frame close this is my code:\[code\]final JFrame frame = new JFrame("2D Game");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(1600,600);frame.setResizable(false); private void continuerButtonActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_continuerButtonActionPerformed int level=getlevel(); System.out.println(niveau); if(niveau == 1) { this.dispose(); frame.add(new Board()); frame.setVisible(true); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { doExitOption(); } }); } }\[/code\]and this is \[code\]doExitOption\[/code\] methode:\[code\] public void doExitOption() { int option=JOptionPane.showConfirmDialog(null, "do you want to quit the game", "Warnning",JOptionPane.YES_NO_OPTION); if(option == JOptionPane.YES_OPTION) { frame.dispose(); } }\[/code\]