java-swingButton

 package com.http;

 import java.awt.*;
 import java.awt.event.*;

 import javax.swing.*;

 import com.http.TestSwing2.HelloWorldFrame;

 public class SwingButton extends JFrame
 {
     private JPanel buttonPanel;
     private static final int DEFAULT_WIDTH = 300;
     private static final int DEFAULT_HEIGHT = 200;

     public SwingButton()
     {
         setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT);
         //创建按钮
         JButton yellowButton = new JButton("yellow");
         JButton blueButton = new JButton("blue");
         JButton redButton = new JButton("red");

         buttonPanel = new JPanel();

         //向面板中添加按钮
         buttonPanel.add(yellowButton);
         buttonPanel.add(blueButton);
         buttonPanel.add(redButton);

         //向frame中添加面板
         add(buttonPanel);

         //实例化事件
         ColorAction ya = new ColorAction(Color.YELLOW);
         ColorAction ba = new ColorAction(Color.BLUE);
         ColorAction ra = new ColorAction(Color.RED);

         //添加按钮事件，改变面板的颜色
         yellowButton.addActionListener(ya);
         blueButton.addActionListener(ba);
         redButton.addActionListener(ra);

     }

     //触发后执行的事件，继承ActionListener，并重写actionPerformed接口
     public class ColorAction implements ActionListener
     {

         private Color backgroundColor;
         public  ColorAction(Color c)
         {
              backgroundColor = c;
         }

         @Override
         public void actionPerformed(ActionEvent event) {
             // TODO Auto-generated method stub
             buttonPanel.setBackground(backgroundColor);
         }
     }

     public static void main(String[] argvs)
     {
         EventQueue.invokeLater(new Runnable()
         {
             public void run()
             {

                 JFrame frame = new SwingButton();
                 frame.setTitle("SwingButton");
                 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                 frame.setVisible(true);
             }
         });

     }

 }