//cd c:\HPBasic\Toppage-sample3\MySwing
//javac ColorLabel.java
//set CLASSPATH=.	
//appletviewer ColorLabel.java

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

/*
    <applet code="ColorLabel.class" width=300 height=200>
    </applet>
*/

public class ColorLabel extends JApplet {
     public void init(){
        Container contentPane = getContentPane();
        ColorLbl label = new ColorLbl();
        contentPane.add(label);
    }
} 

class ColorLbl extends JLabel implements ActionListener {
   JButton yellowB;
   JButton blueB;
   JButton redB;
 
   public ColorLbl() {
      yellowB = new JButton("Yellow");
      blueB = new JButton("Blue");
      redB = new JButton("Red");
 
      add(yellowB);
      add(blueB);
      add(redB);

      yellowB.addActionListener(this);
      blueB.addActionListener(this);
      redB.addActionListener(this);
  }

   public void actionPerformed(ActionEvent event) {
        Color c;
        Object source = event.getSource();
//      String source = event.getActionCommand();
        if (source == yellowB) {
            c=Color.yellow;
        } else if  (source == blueB) {
            c=Color.blue;
        } else  {
            c=Color.red;
        }
        setBackground(c);
    }
}

/*
 ColorPane.java 
   ColorPanelにははりついたボタンだが、JLabelではだめ。
*/