在Java GUI中提供Yes / No选项

当用户点击’X’时,我想更改下面的代码以显示是或否选项,但我担心我的 java新手技能还没有延伸到它.有什么建议吗？我想尽可能保持下面的代码完整无缺,以便了解需要采取哪些不同的方式以供将来参考.

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;

public class WindowExit extends WindowAdapter
{
public void windowClosing(WindowEvent e)
{
    JOptionPane.showMessageDialog( null,"Are you sure you want to close?" );
    System.exit(0);
}
}

解决方法

使用showConfirmDialog如下：

int reply = JOptionPane.showConfirmDialog(null,"Are you sure you want to close?","Close?",JOptionPane.YES_NO_OPTION);
if (reply == JOptionPane.YES_OPTION)
{
   System.exit(0);
}