Java tutorial
import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.JFrame; import javax.swing.JOptionPane; public class Main { public static void main(String... args) { JFrame frame = new JFrame(); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent we) { int result = JOptionPane.showConfirmDialog(frame, "Do you want to Exit ?", "Exit Confirmation : ", JOptionPane.YES_NO_OPTION); if (result == JOptionPane.YES_OPTION) frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); else if (result == JOptionPane.NO_OPTION) frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE); } }); frame.setSize(300, 300); frame.setVisible(true); } }