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来自「本压缩文档为《Java大学实用教程》（7-121-00959-5 电子工业出版社」· 代码 · 共 39 行

import java.awt.*; 
import java.awt.event.*;
import javax.swing.*;
class MyWindow extends JFrame
{ 		
    JButton button;
    MyWindow(String s) 
    { 
      super(s);
      addWindowListener(new WindowAdapter()
                            {              //匿名类对象做监视器。
                               public void windowClosing(WindowEvent e)
                                {  
                                   System.exit(0);
                                }
                                public void windowIconified(WindowEvent e)
                                {  
                                   button.setBackground(Color.yellow);
                                }
                            } 
                       );
      button=new JButton("按钮");
      Container con=getContentPane();
      con.setLayout(new FlowLayout());
      con.add(button); 
      setBounds(100,100,150,150);
      setVisible(true);
      validate();
      setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
    }
}
class Example
{
    public static void main(String args[])
    { 
       MyWindow win=new MyWindow("窗口");
    }
}