主要表现是程序结束后无法关闭，也就是windowClosing事件没有向应，我这里用的是内部类，请问是程序的事情还是计算机系统的事情，这段程序前几天运行还是正常的，今天就不能关闭。


import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class CardLayoutDemo implements ActionListener{
         JPanel p1,p2,p3,p4;
         int i=1;
         JFrame f;
   public CardLayoutDemo(){
      f=new JFrame();
      Container contentPane=f.getContentPane();
      contentPane.setLayout(new GridLayout(2,1));
      p1=new JPanel();
      Button b=new Button("change care");
      b.addActionListener(this);
      p1.add(b);
      contentPane.add(p1);
      p2=new JPanel();
      p2.setLayout(new FlowLayout());
      p2.add(new JButton("first"));
      p2.add(new JButton("2nd"));
      p2.add(new JButton("3rd"));
      p3=new JPanel();
      p3.setLayout(new GridLayout(3,1));
      p3.add(new JButton("fourth"));
      p3.add(new JButton("fifth"));
      p3.add(new JButton("last button"));
      p4=new JPanel();
      p4.setLayout(new CardLayout());
      p4.add("one",p2);
      p4.add("two",p3);
      ((CardLayout)p4.getLayout()).show(p4,"one");
      contentPane.add(p4);
      f.setTitle("C1ardLayout");
      f.pack();
      f.setVisible(true);
      f.addWindowListener(new WindowAdapter(){
        public void WindowClosing(WindowEvent e)
        {
          System.exit(0);
        }} );
 }                               
            public void actionPerformed(ActionEvent event)
         {          
                   switch(i)
                   {   
                      case 1:
                      ((CardLayout)p4.getLayout()).show(p4,"two");
                        break;
                      case 2:
                      ((CardLayout)p4.getLayout()).show(p4,"one");
                        break;
                    }
             i++;
             if (i==3)
                 i=1;
             f.validate();
          }
          
          
        public static void main(String args[]){
                      new CardLayoutDemo();
                      }
                      }                                       

呵呵，是windowClosing(WindowEvent e)
写成WindowClosing(WindowEvent e)，就变成一个全新的自己定义的函数

注意大小写,应该是windowClosing

public void WindowClosing(WindowEvent e),应该是:
public void windowClosing(WindowEvent e)

你是重载ActionListener里的方法,怎么能随便改变大小写呢,那就是你的方法了.这是个值得注意的问题,thinking in java里曾经专门提到过这个问题,并且自己也曾以身试法.

呵呵，up!

e_he (海棠)  :
  该结贴时就结贴,多留点时间继续前进.

也许你使用编辑器时不小心造成的！！

老兄，在我的机子上运行正常

前几天还好好的，今天就坏了。怎么什么怪事都有

我运行正常