example8_14.java.bak

书中的例题

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

public class Example8_14 extends Applet
{
  JButton play,loop,stop;
  AudioClip audio = null;

  public void init()
  {
    resize(200,30);
    play = new JButton("play");
    loop = new JButton("Loop");
    stop = new JButton("Stop");
    stop.setEnabled(false);
    audio = getAudioClip(getCodeBase(),"笨小孩.mid");  

    add(play);
    play.addActionListener(
    new ActionListener() {
      public void actionPerformed(ActionEvent event) {
        playActionPerformed(event);
       }
     }
   );

   add(loop);
   loop.addActionListener(
     new ActionListener() {
       public void actionPerformed(ActionEvent event) {
         loopActionPerformed(event);
       }
     }
   );

   add(stop);
   stop.addActionListener(
     new ActionListener() {
       public void actionPerformed(ActionEvent event) {
         stopActionPerformed(event);
       }
     }
   );
 }

 private void playActionPerformed(ActionEvent event)
 {
    if(audio!=null)
	  {
       audio.play();
       play.setEnabled(false);
       loop.setEnabled(false);
       stop.setEnabled(true);
       showStatus("playing sound only once!");
      }
	 else 
      showStatus("Sound file no loaded");
 }

private void loopActionPerformed(ActionEvent event)
 {
    if(audio!=null)
	  {
        audio.loop();
        play.setEnabled(false);
        loop.setEnabled(false);
        stop.setEnabled(true);
        showStatus("Playing sound all the time!");
      }
	else
      showStatus("Sound file not loaded");
 }

private void stopActionPerformed(ActionEvent event)
  {
    audio.stop();
    loop.setEnabled(true);
    stop.setEnabled(false);
    showStatus("Stop playing sound!");
  }
}