AppletMethods.java Source code

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Here is the source code for AppletMethods.java
Source

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

//applet.html

/*
<title>Demonstration of Applet Methods</title>
<body bgcolor="white">
<h1>Demonstration of Applet Methods</h1>
<applet code="AppletMethods" width=200 height=100>
   <param name="SNDFILE" VALUE="foo.au">
</applet>
    
*/
import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.Graphics;
import java.net.MalformedURLException;
import java.net.URL;

/** AppletMethods -- show stop/start and AudioClip methods */

public class AppletMethods extends Applet {
    /** AudioClip object, used to load and play a sound file. */
    AudioClip snd = null;

    /** Initialize the sound file object and the GUI. */
    public void init() {
        System.out.println("In AppletMethods.init()");
        try {
            snd = getAudioClip(new URL(getCodeBase(), "laugh.au"));
        } catch (MalformedURLException e) {
            showStatus(e.toString());
        }
        setSize(200, 100); // take the place of a GUI
    }

    /** Called from the Browser when the page is ready to go. */
    public void start() {
        System.out.println("In AppletMethods.start()");
        if (snd != null)
            snd.play(); // loop() to be obnoxious...
    }

    /** Called from the Browser when the page is being vacated. */
    public void stop() {
        System.out.println("In AppletMethods.stop()");
        if (snd != null)
            snd.stop(); // stop play() or loop() 
    }

    /** Called from the Browser (when the applet is being un-cached?).
     * Not actually used here, but the println will show when it's called.
     */
    public void destroy() {
        System.out.println("In AppletMethods.destroy()");
    }

    public void paint(Graphics g) {
        g.drawString("Welcome to Java", 50, 50);
    }

    /** An alternate form of getParameter that lets
     * you provide a default value, since this is so common.
     */
    public String getParameter(String p, String def) {
        return getParameter(p) == null ? def : getParameter(p);
    }
}