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);

             }

         });

     }

 }