The following applet works fine on Solaris to show a series of JPEG
images and play an associated sound file with each:

    http://ttis.thomtech.com/%7Esuresh/java/beta/alaska-slides/jdk.html

On Win95, the first image loads and displays fine, and the sound for
it plays fine. Pressing the "Next" button for the next image
repeatably leads to an appletviewer shutdown message, with a report of
a page fault in module AWT.DLL.

Below is the source, from

    http://ttis.thomtech.com/%7Esuresh/java/beta/slide-projector/SlideProjector.java

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import java.awt.*;
import java.io.*;
import java.applet.Applet;
import java.applet.AudioClip;
import java.util.Random;
import java.util.StringTokenizer;
import java.lang.Double;
import java.lang.Integer;
import java.net.URL;

/**
  An applet to let the user view slide images (with accompanying audio and textual
  information). The images can be in GIF or JPEG format. Parameters supported:

  N=# the number of slides in this presentation. Required.
  audio=comma (or space) separated list of slide numbers that have associated audio
  title= name of a file that contains titles (relative to document base)
  imagetype={gif|jpeg|jpg}: type of images, default is gif

  Here's an example:

  <APPLET CODE="SlideProjector" WIDTH=600 HEIGHT=400>
  <PARAM NAME=n VALUE=10>
  <PARAM NAME=audio VALUE=1,2,8>
  <PARAM NAME=title VALUE=titles.txt>
  </APPLET>

  Note: the slides are in files called T#.gif or T#.jpeg in a slides/ subdirectory
  relative to document base, where # is the slide number; audio is in T#.au in
  the audio/ subdirectory. Titles are in the file specified by the TITLE param.
  The file should contain the slide number and title in the same line. Not all slides
  need to have titles - a default one will be provided.

  To do:

  Control and slide frames should be distinct from the browser. There is a repaint
  bug that prevents this (I think!)

  Allow for manual and auto modes and let the user and/or the provider specify
  delays between slides.

  Dealing with different sized slides and gracefully transitioning between them.

  Continuous looping audio..

  Multi-frame collage?

  Allow for neat transitions between slides.

  Incorporate MediaTracker support for audio and text files? Can resources be
  loaded in the background while user is thinking?

  @Author: Suresh Srinivasan (###@###.###)
  @Date: Nov 1995
  @Version: 0.1
  */
public class SlideProjector extends java.applet.Applet {

    public int appletWidth = 600;
    public int appletHeight = 400;

    int gutterWidth = 2; /* gutter between sections */
    int gutterHeight = 5; /* gutter between sections */

/* some constants */
    public final static Color BACKGROUNDCOLOR = Color.lightGray;
    public final static Color CONTROLCOLOR = Color.lightGray;
    public final static Color TITLECOLOR = Color.white;

    public final static String NEXTSTRING = "Next";
    public final static String PREVSTRING = "Prev";
    public final static String AUDIOSTRING = "Audio";

    public final static Font TITLEFONT = new Font("Dialog", Font.BOLD, 12);
    public final static Font CAPTIONFONT = new Font("TimesRoman", Font.PLAIN, 12);
    public final static Font CONTROLFONT = new Font("Dialog", Font.BOLD, 12);

    public final static Font BUTTONFONT = new Font("Dialog", Font.BOLD, 12);
    public final static Font LABELFONT = new Font("Dialog", Font.BOLD, 12);
    public final static Font CHOICEFONT = new Font("TimesRoman", Font.BOLD, 12);
    public final static Font MENUFONT = new Font("TimesRoman", Font.PLAIN, 10);
    public final static Font AUTHORFONT = new Font("TimesRoman", Font.ITALIC, 12);
    public final static Font ERRORFONT = new Font("TimesRoman", Font.BOLD, 20);
    public final static Font LOADINGFONT = new Font("TimesRoman", Font.PLAIN, 12);

    public static final String ERRORSTRING = "Missing Image";
    public static final String LOADINGSTRING = "Image Loading";

    public static final String YES = "yes";
    public static final String NO = "no";
    public static final String TRUE = "true";
    public static final String FALSE = "false";

    public static final int GIF = 1;
    public static final int JPG = 2;
    public static final int JPEG = 3;

    String audioParam;
    String titleParam;
    String captionParam;

    String author; /* someday will allow author information */
    int N=0; /* number of slides */
    int current = 0; /* current slide number 0->N-1 */
    Slide slide[];
    int imageType; /* GIF or JPEG */

    MediaTracker tracker; /* currently used for images */

    ControlPanel controlPanel;
    SlidePanel slidePanel;
    TitlePanel titlePanel;

    public void parse() {
Integer intObj;

/* width */
try {
intObj = new Integer(getParameter("width"));
appletWidth = intObj.intValue();
} catch (Exception e) { }

/* height */
try {
intObj = new Integer(getParameter("height"));
appletHeight = intObj.intValue();
} catch (Exception e) { }

/* how many slides? */
try {
intObj = new Integer(getParameter("n"));
N = intObj.intValue();
} catch (Exception e) {
System.out.println("Require parameter n to be specified");
}
slide = new Slide[N];
for (int i=0; i<N; i++)
slide[i] = new Slide();

/* audio? */
try {
audioParam = getParameter("audio");
} catch (Exception e) { }

/* captions? */
try {
captionParam = getParameter("caption");
} catch (Exception e) { }

/* titles? */
try {
titleParam = getParameter("title");
} catch (Exception e) { }

/* Image type? Default is GIF*/
imageType = GIF;
try {
if ("gif".equalsIgnoreCase(getParameter("imagetype")))
imageType = GIF;
else if ("jpg".equalsIgnoreCase(getParameter("imagetype")))
imageType = JPG;
else if ("jpeg".equalsIgnoreCase(getParameter("imagetype")))
imageType = JPEG;
} catch (Exception e) { }
    }

    public void load() {

/* for now, use only to track images */
tracker = new MediaTracker(slidePanel);

/* load images */
for (int i=0; i<N; i++) {
int j = i+1;

try {

if (imageType == GIF) {
slide[i].img = getImage(getDocumentBase(), "slides/T" + j + ".gif");
} else if (imageType == JPG) {
slide[i].img = getImage(getDocumentBase(), "slides/T" + j + ".jpg");
} else if (imageType == JPEG) {
slide[i].img = getImage(getDocumentBase(), "slides/T" + j + ".jpeg");
} else {
throw(new Exception());
}
tracker.addImage(slide[i].img, i);

} catch (Exception e) {
slide[i].img = null;
slide[i].imgLoaded = true;
}

/* load first image */
if (N > 0)
tracker.checkID(0, true);
}

/* load audio */
if (audioParam != null) {
StringTokenizer st = new StringTokenizer(audioParam, ", ");
String s;
int m;

while (st.hasMoreTokens()) {
try {
s = st.nextToken();
m = new Integer(s).intValue();
if (m>0 && m<=N) {
slide[m-1].hasAudio = true;
} else {
throw (new Exception());
}
} catch (Exception e) { }
}
}
for (int i=0; i<N; i++) {
try {
if (slide[i].hasAudio) {
int i1 = i+1;
AudioLoader ml = new AudioLoader(this, new URL(getDocumentBase(), "audio/T" + i1 + ".au"), i);
ml.start();
} else {
throw (new Exception());
}
} catch (Exception e) {
slide[i].audio = null;
slide[i].audioLoaded = true;
}
}

/* load titles - all titles are loaded from a single file. The file contains
   lines with two fields: the slide number and the title separated by white space.
*/
if (titleParam != null) {
DataInputStream s;
String inputString;

try {
URL url = new URL(getDocumentBase(), titleParam);
s = new DataInputStream(url.openStream());
while ((inputString = s.readLine()) != null) {
int n;
if ((n = inputString.indexOf(' ')) == -1)
n = inputString.indexOf('\\t');
if (n > 0) {
int m = (new Integer(inputString.substring(0, n)).intValue());
if (m>0 && m<=N) {
slide[m-1].title = inputString.substring(n+1);
}
}
}
s.close();
} catch (Exception e) { }

for (int i=0; i<N; i++)
slide[i].titleLoaded = true;
}
    }

/* initialize applet */
    public void init() {
parse();

setLayout(new BorderLayout(3, 3));

titlePanel = new TitlePanel(this);
add("North", titlePanel);

controlPanel = new ControlPanel(this);
add("South", controlPanel);

slidePanel = new SlidePanel(this);
add("Center", slidePanel);

resize(appletWidth, appletHeight);
layout();

load();
repaint();
    }

    public static void main(String args[]) {
Frame f = new Frame("Slide Projector");
SlideProjector applet = new SlideProjector();
int W = 600;
int H = 400;

applet.init();

f.add("Center", applet);
f.resize(W, H);
f.pack();
f.show();
    }
}

/**
  Information associated with a slide
  */
class Slide {
    Image img;
    AudioClip audio;
    String caption;
    String title;

    boolean hasAudio;

    boolean imgLoaded; /* true if associated image has been loaded */
    boolean audioLoaded;
    boolean captionLoaded;
    boolean titleLoaded;
}

/**
  Contains the title in a Label
 */
class TitlePanel extends java.awt.Label {
    SlideProjector applet;

    public TitlePanel(SlideProjector applet) {
this.applet = applet;
setBackground(SlideProjector.TITLECOLOR);
repaint();
    }

    public void paint(Graphics g) {
Dimension d = size();
        String s;

        g.setColor(Color.black);
        g.drawRect(0, 0, d.width-1, d.height-1);
        if (applet.slide[applet.current].title != null) {
            s = applet.slide[applet.current].title;
        } else {
            s = "Slide " + (applet.current+1) + " of " + applet.N;
        }
        g.setFont(SlideProjector.TITLEFONT);
        g.drawString(s, (d.width-g.getFontMetrics().stringWidth(s))/2, d.height-5);
    }
}

/**
  Widgets for control
  */
class ControlPanel extends java.awt.Panel {
    SlideProjector applet;
    Button nextButton;
    Button prevButton;
    Button audioButton;

    public ControlPanel(SlideProjector applet) {
this.applet = applet;
setLayout(new FlowLayout(FlowLayout.CENTER));

nextButton = new Button();
nextButton.setFont(SlideProjector.BUTTONFONT);
nextButton.setLabel(SlideProjector.NEXTSTRING);
nextButton.disable();

prevButton = new Button("Prev");
prevButton.setFont(SlideProjector.BUTTONFONT);
prevButton.setLabel(SlideProjector.PREVSTRING);
prevButton.disable();

audioButton = new Button("Audio");
audioButton.setFont(SlideProjector.BUTTONFONT);
audioButton.setLabel(SlideProjector.AUDIOSTRING);
audioButton.disable();

add("West", prevButton);
add("Center", audioButton);
add("East", nextButton);

repaint();
    }
    
/* trap mouse events */
    public boolean action(Event e, Object o) {
boolean status = false;

/* previous slide */
if (e.target instanceof Button && (prevButton.getLabel().equals((String)o))) {
prev();
status = true;

} else if (e.target instanceof Button && (nextButton.getLabel().equals((String)o))) {
next();
status = true;

} else if (e.target instanceof Button && (audioButton.getLabel().equals((String)o))) {

if (applet.slide[applet.current].audio != null) {
try {
applet.slide[applet.current].audio.play();
status = true;
} catch (Exception x) { }
}
}
return(status);
    }

/* goes to next slide */
    void next() {
if (applet.slide[applet.current].audio != null)
applet.slide[applet.current].audio.stop();

if (applet.current < applet.N-1)
applet.current++;
repaint();
applet.titlePanel.repaint();
applet.slidePanel.repaint();
    }

/* goes to previous slide */
    void prev() {
if (applet.slide[applet.current].audio != null)
applet.slide[applet.current].audio.stop();

if (applet.current > 0)
applet.current--;
repaint();
applet.titlePanel.repaint();
applet.slidePanel.repaint();
    }

    public void paint(Graphics g) {

if (applet.current > 0)
prevButton.enable();
else
prevButton.disable();

if (applet.current < applet.N-1)
nextButton.enable();
else
nextButton.disable();

if ((applet.slide[applet.current].audio != null) && (applet.slide[applet.current].audioLoaded))
audioButton.enable();
else
audioButton.disable();
    }
}

/**
  Panel for the slide
  */
class SlidePanel extends java.awt.Panel {
    SlideProjector applet;

    public SlidePanel(SlideProjector applet) {
this.applet = applet;
    }
    
    public void update(Graphics g) {
applet.tracker.checkID(applet.current, true);
/* check for tracker errors? */
paint(g);
    }

    public void paint(Graphics g) {
Dimension d = size();

        g.setColor(Color.black);
        g.drawRect(0, 0, d.width-1, d.height-1);
        g.drawImage(applet.slide[applet.current].img, 0, 0, d.width, d.height, this);
    }
}

/* until audio is supported by the MediaTracker */
class AudioLoader implements Runnable {
    SlideProjector applet;
    URL url;
    int n;
    Thread thread;

    public AudioLoader(SlideProjector applet, URL url, int n) {
this.applet = applet;
this.url = url;
this.n = n;
    }

    public void start() {
if (thread == null) {
thread = new Thread(this);
/* thread.setPriority(MIN_PRIORITY);*/
thread.start();
}
    }

    public void run() {

applet.slide[n].audio = null;

if (applet.slide[n].hasAudio) {
try {
applet.slide[n].audio = applet.getAudioClip(url);
} catch (Exception e) { }
}
applet.slide[n].audioLoaded = true;
/* inform applet that audio has loaded, so the audio button may be enabled */
applet.controlPanel.repaint();
    }
}

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