Applet Sound
/* From http://java.sun.com/docs/books/tutorial/index.html */
/*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
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* modification, are permitted provided that the following conditions are met:
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* list of conditions and the following disclaimer.
*
* -Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
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* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
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/*
<html>
<body>
<applet code=SoundExample.class width=450 height=50>
</applet>
</body>
</html>
*/
/*
* 1.1 version.
*/
import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.Button;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
public class SoundExample extends Applet implements ActionListener {
SoundList soundList;
String onceFile = "bark.au";
String loopFile = "train.au";
AudioClip onceClip;
AudioClip loopClip;
Button playOnce;
Button startLoop;
Button stopLoop;
Button reload;
boolean looping = false;
public void init() {
playOnce = new Button("Bark!");
playOnce.addActionListener(this);
add(playOnce);
startLoop = new Button("Start sound loop");
stopLoop = new Button("Stop sound loop");
stopLoop.setEnabled(false);
startLoop.addActionListener(this);
add(startLoop);
stopLoop.addActionListener(this);
add(stopLoop);
reload = new Button("Reload sounds");
reload.addActionListener(this);
add(reload);
startLoadingSounds();
}
void startLoadingSounds() {
//Start asynchronous sound loading.
soundList = new SoundList(this, getCodeBase());
soundList.startLoading(loopFile);
soundList.startLoading(onceFile);
}
public void stop() {
onceClip.stop(); //Cut short the one-time sound.
if (looping) {
loopClip.stop(); //Stop the sound loop.
}
}
public void start() {
if (looping) {
loopClip.loop(); //Restart the sound loop.
}
}
public void actionPerformed(ActionEvent event) {
//PLAY BUTTON
Object source = event.getSource();
if (source == playOnce) {
if (onceClip == null) {
//Try to get the AudioClip.
onceClip = soundList.getClip(onceFile);
}
if (onceClip != null) { //If the sound is loaded:
onceClip.play(); //Play it once.
showStatus("Playing sound " + onceFile + ".");
} else {
showStatus("Sound " + onceFile + " not loaded yet.");
}
return;
}
//START LOOP BUTTON
if (source == startLoop) {
if (loopClip == null) {
//Try to get the AudioClip.
loopClip = soundList.getClip(loopFile);
}
if (loopClip != null) { //If the sound is loaded:
looping = true;
loopClip.loop(); //Start the sound loop.
stopLoop.setEnabled(true); //Enable stop button.
startLoop.setEnabled(false); //Disable start button.
showStatus("Playing sound " + loopFile + " continuously.");
} else {
showStatus("Sound " + loopFile + " not loaded yet.");
}
return;
}
//STOP LOOP BUTTON
if (source == stopLoop) {
if (looping) {
looping = false;
loopClip.stop(); //Stop the sound loop.
startLoop.setEnabled(true); //Enable start button.
stopLoop.setEnabled(false); //Disable stop button.
}
showStatus("Stopped playing sound " + loopFile + ".");
return;
}
//RELOAD BUTTON
if (source == reload) {
if (looping) { //Stop the sound loop.
looping = false;
loopClip.stop();
startLoop.setEnabled(true); //Enable start button.
stopLoop.setEnabled(false); //Disable stop button.
}
loopClip = null; //Reset AudioClip to null.
onceClip = null; //Reset AudioClip to null.
startLoadingSounds();
showStatus("Reloading all sounds.");
return;
}
}
}
/*
* Code is the same in both 1.0 and 1.1.
*/
//Loads and holds a bunch of audio files whose locations are specified
//relative to a fixed base URL.
class SoundList extends java.util.Hashtable {
Applet applet;
URL baseURL;
public SoundList(Applet applet, URL baseURL) {
super(5); //Initialize Hashtable with capacity of 5 entries.
this.applet = applet;
this.baseURL = baseURL;
}
public void startLoading(String relativeURL) {
new SoundLoader(applet, this, baseURL, relativeURL);
}
public AudioClip getClip(String relativeURL) {
return (AudioClip) get(relativeURL);
}
public void putClip(AudioClip clip, String relativeURL) {
put(relativeURL, clip);
}
}
/*
* Code is the same in both 1.0 and 1.1.
*/
class SoundLoader extends Thread {
Applet applet;
SoundList soundList;
URL baseURL;
String relativeURL;
public SoundLoader(Applet applet, SoundList soundList, URL baseURL,
String relativeURL) {
this.applet = applet;
this.soundList = soundList;
this.baseURL = baseURL;
this.relativeURL = relativeURL;
setPriority(MIN_PRIORITY);
start();
}
public void run() {
AudioClip audioClip = applet.getAudioClip(baseURL, relativeURL);
//AudioClips load too fast for me!
//Simulate slow loading by adding a delay of up to 10 seconds.
try {
sleep((int) (Math.random() * 10000));
} catch (InterruptedException e) {
}
soundList.putClip(audioClip, relativeURL);
}
}
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