Echec chargement applet en java

import java.awt.*;
import java.awt.image.*;
import java.applet.*;
import java.net.URL;
import java.net.MalformedURLException;
import java.util.*;

/**
 * The diaporama applet class
 *
 * @version $Id: Diapo.java,v 1.38 1999/07/13 17:26:21 dfrick Exp $
 * @author Didier Frick (dfrick@dial.eunet.ch)
 */
public class Diapo extends java.applet.Applet {
    protected int between=5;
    protected int delay=100; /* ms */
    protected int mainDelay=2500;
    protected String message="diaporama 3D fac de droit de narbonne";
    protected String target="_blank";
    protected Image img;
    protected FadingImageSource src;
    protected Vector images;
    protected URL link;
    protected Thread thread;
    protected ThreadGroup threadGroup;


    /**
     * This flag is used to downgrade the behavior of this class if it is running in a
     * "problematic" environment like Netscape on the Macintosh.
     * If it is true, only the first image will be displayed
     */
    protected static boolean minimal=true;

    static {
	try {
	    String vendor=System.getProperty("java.vendor").toLowerCase();
	    String os=System.getProperty("os.name").toLowerCase();
	    minimal=vendor.startsWith("netscape")&&os.startsWith("mac");
	} catch(Exception xc) {
	    xc.printStackTrace();
	}
    }

    /**
     * Read the applet parameter values
     */
    public void init() {

	try {
	    between=Integer.parseInt(getParameter("between"));
	} catch (Exception x) {
	    ;
	}

	try {
	    mainDelay=Integer.parseInt(getParameter("mainDelay"));
	} catch (Exception x) {
	    ;
	}
    
	try {
	    delay=Integer.parseInt(getParameter("delay"));
	} catch (Exception x) {
	    ;
	}

	try {
	    link=new URL(getDocumentBase(),getParameter("link"));
	} catch (Exception x) {
	    ;
	}

	String param;
	param=getParameter("target");
	if(param!=null)
	    target=param;

	param=getParameter("message");
	if(param!=null)
	    message=param;

	images=new Vector();
	for(int nImages=0;(param=getParameter("image"+(nImages+1)))!=null; nImages++) {
	    try {
		Image i=getImage(getDocumentBase(),param);
		if(i!=null) {
		    images.addElement(i);
		    if(minimal)
			break;
		}
	    } catch (Exception x) {
		;
	    }
	}
	if(!minimal) {
	    threadGroup=Thread.currentThread().getThreadGroup();
	    src=new FadingImageSource(images,
				      between,
				      mainDelay,
				      delay,
				      bounds().width,
				      bounds().height);
	    img=createImage(src);
	} else {
	    img=(Image)images.elementAt(0);
	}
    }

    /**
     * Override update to suppress flashing
     */
    public void update(Graphics g) {
	paint(g);
    }

    /**
     * The paint method: draw the animated image if defined, otherwise
     * clear the background.
     */
    public void paint(Graphics g) {
	if(img!=null)
	    g.drawImage(img,0,0,this);
    }

    /**
     * The start method: create the ImageProducer and animated image
     */
    public void start() {
	thread=new Thread(threadGroup,src);
	thread.start();
	repaint();
    }

    /**
     * The stop method stops the animation thread
     */
    public void stop() {
	if(thread!=null)
	    thread.stop();
	thread=null;
    }

    public void destroy() {
	src=null;
	img=null;
	images=null;
	System.gc();
    }

    public String getAppletInfo() {
	return "Diaporama $Revision: 1.38 $, Copyright (C) 1997,1998 by Didier Frick (dfrick@dial.eunet.ch)";
    }

    public String[][] getParameterInfo() {
	return pinfo;
    }

    private String pinfo[][] = {
	{ "between", "int", "Number of interpolated images between each image"},
	{ "mainDelay", "int", "Time to display a non-interpolated image (ms)"},
	{ "delay", "int", "Time to display an interpolated image (ms)"},
	{ "link", "URL", "Document to show when user clicks on applet"},
	{ "target", "String", "Frame in which to display link"},
	{ "message", "String", "Text to display in status bar when mouse cursor enters applet"},
	{ "image1", "URL", "First image. Used via Applet.getImage"},
	{ "image2", "URL", "Next image. And so on... (without gaps)"}
    };

    /**
     * Display message if mouse cursor enters applet.
     */
    public boolean mouseEnter(Event evt,
			     int x,
			     int y) {
	showStatus(message);
	return true;
    }

    /**
     * Display linked document if mouse clicked
     */
    public boolean mouseDown(Event evt,
			     int x,
			     int y) {
	if(link!=null)
	    getAppletContext().showDocument(link,target);
	return true;
    }

}