weboutline.java

java写的crawler

     * LinkView listeners
     */

    private Vector listeners = new Vector ();

    /**
     * Add a listener for LinkViewEvents.  A LinkViewEvent is sent every time a
     * node or edge in the graph is double-clicked.
     * @param listener Object that wants to receive LinkViewEvents 
     */
    public void addLinkViewListener (LinkViewListener listener) {
        if (!listeners.contains (listener))
            listeners.addElement (listener);
    }

    /**
     * Removes a listener from the set of LinkViewEvent listeners.  If it is not found in the set,
     * does nothing.
     *
     * @param listen a listener
     */
    public void removeLinkViewListener (CrawlListener listener) {
        listeners.removeElement (listener);
    }

    void fireEvent (Link link) {
        LinkViewEvent event = new LinkViewEvent (this, link);

        for (int j=0, len=listeners.size(); j<len; ++j) {
            LinkViewListener listen = (LinkViewListener)listeners.elementAt(j);
            listen.viewLink (event);
        }
    }

    public boolean handleEvent (Event event) {
        if (event.id == Event.ACTION_EVENT) {
            TreeNode n = (TreeNode)getSelectedNode();
            if (n != null)
                fireEvent ((Link)n.getDataObject());
        }
        else if (event.id == Event.MOUSE_DOWN && event.metaDown())
            showControlPanel ();
        else
            return super.handleEvent (event);
        return true;
    }
    
    public Link getSelectedLink () {
        TreeNode n = getSelectedNode();
        if (n != null)
            return (Link)n.getDataObject();
            
        return null;
    }
    

    /**
     * Create a new Frame containing a WebOutline connected to a crawler.
     */ 
    public static Frame monitor (Crawler crawler) {
        Frame win = new ClosableFrame ("Outline: " + crawler.getName ());

        WebOutline g = new WebOutline ();
        crawler.addCrawlListener (g);
        crawler.addLinkListener (g);

        win.add ("Center", g);
        win.pack ();
        win.show ();

        return win;
    }



    Hashtable icons = new Hashtable ();
       // maps String (CrawlEvent name or user-defined icon name) to Image

    Image pageIcon;
    Image linkIcon;
    Image retrievingIcon;
    Image errorIcon;

    /**
     * Get a named icon.
     * @param name Name of icon.
     * @return icon associated with the name, or null if name unknown.
     */
    public Image getIcon (String name) {
            return (Image)icons.get (name);
    }

    /**
     * Map a name to an icon.
     * @param name Name of icon.
     * @param icon Icon image.  If null, mapping is deleted.
     */
    public void setIcon (String name, Image icon) {
        if (icon != null)
           icons.put (name, icon);
        else
           icons.remove (name);
    }

    /**
     * Set the default icon used for pages.
     * @param icon Icon image.  If null, mapping is deleted.
     */
    public void setPageIcon (Image icon) {
        pageIcon = icon;
        setIcon (LinkEvent.eventName[LinkEvent.VISITED], icon);
    }

    /**
     * Set the default icon used for links.
     * @param icon Icon image.  If null, mapping is deleted.
     */
    public void setLinkIcon (Image icon) {
        linkIcon = icon;
        setIcon (LinkEvent.eventName[LinkEvent.QUEUED], icon);
        setIcon (LinkEvent.eventName[LinkEvent.ALREADY_VISITED], icon);
        setIcon (LinkEvent.eventName[LinkEvent.SKIPPED], icon);
    }

    /**
     * Set the default icon used for requests in progress.
     * @param icon Icon image.  If null, mapping is deleted.
     */
    public void setRetrievingIcon (Image icon) {
        retrievingIcon = icon;
        setIcon (LinkEvent.eventName[LinkEvent.RETRIEVING], icon);
        setIcon (LinkEvent.eventName[LinkEvent.DOWNLOADED], icon); 
   }

    /**
     * Set the default icon used for failed requests.
     * @param icon Icon image.  If null, mapping is deleted.
     */
    public void setErrorIcon (Image icon) {
        errorIcon = icon;
        setIcon (LinkEvent.eventName[LinkEvent.ERROR], icon);
    }


    public static Image defaultPageIcon;
    public static Image defaultLinkIcon;
    public static Image defaultRetrievingIcon;
    public static Image defaultErrorIcon;

    static int errorWidth = 16;
    static int errorHeight = 16;
    static int[] errorData = {
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xfffc0404, 0xfffc0404, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xfffc0404, 0xfffc0404, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xfffc0404, 0xfffc0404, 0xfffc0404, 0xffffff, 0xffffff, 0xfffc0404, 
        0xfffc0404, 0xfffc0404, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xfffc0404, 
        0xfffc0404, 0xfffc0404, 0xfffc0404, 0xfffc0404, 0xfffc0404, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xfffc0404, 0xfffc0404, 
        0xfffc0404, 0xfffc0404, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xfffc0404, 0xfffc0404, 0xfffc0404, 0xfffc0404, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xfffc0404, 
        0xfffc0404, 0xfffc0404, 0xfffc0404, 0xfffc0404, 0xfffc0404, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xfffc0404, 0xfffc0404, 0xfffc0404, 0xffffff, 
        0xffffff, 0xfffc0404, 0xfffc0404, 0xfffc0404, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xfffc0404, 0xfffc0404, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xfffc0404, 0xfffc0404, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
        0xffffff, 0xffffff, 0xffffff, 0xffffff
    };

    static int linkWidth = 16;
    static int linkHeight = 16;
    static int[] linkData = {
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xff343464, 0xff343464, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xff343464, 0xff343464, 0xffd4d4fc, 
        0xffc4c4c4, 0xff343464, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xff343464, 0xff343464, 0xff343464, 
        0xff343464, 0xffd4d4fc, 0xffd4d4fc, 0xffc4c4c4, 0xff6464cc, 0xff343464, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xff343464, 0xffccccfc, 0xff848484, 0xff343464, 0xffd4d4fc, 0xff848484, 
        0xff848484, 0xff6464cc, 0xff343464, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xff343464, 0xff343464, 0xffd4d4fc, 0xffc4c4c4, 
        0xff343464, 0xffd4d4fc, 0xffc4c4c4, 0xff6464cc, 0xff6464cc, 0xff343464, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xff343464, 0xff343464, 0xffd4d4fc, 0xffc4c4c4, 0xff343464, 0xffd4d4fc, 
        0xffc4c4c4, 0xff6464cc, 0xff6464cc, 0xff343464, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xff343464, 0xffccccfc, 0xffd4d4fc, 
        0xffc4c4c4, 0xff343464, 0xff343464, 0xff6464cc, 0xff6464cc, 0xff343464, 
        0xff343464, 0xff343464, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xff343464, 0xffd4d4fc, 0xffc4c4c4, 0xffc4c4c4, 0xff343464, 0xfcfcfc, 
        0xfcfcfc, 0xff343464, 0xff343464, 0xffd4d4fc, 0xffccccfc, 0xff343464, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xff343464, 0xffccccfc, 0xffc4c4c4, 
        0xff343464, 0xff343464, 0xfcfcfc, 0xfcfcfc, 0xff040404, 0xff343464, 
        0xffccccfc, 0xffc4c4c4, 0xffc4c4c4, 0xff343464, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xff343464, 0xff040404, 0xff343464, 0xff343464, 0xff343464, 
        0xfcfcfc, 0xff040404, 0xff343464, 0xffccccfc, 0xffc4c4c4, 0xff343464, 
        0xff343464, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xff343464, 
        0xff343464, 0xffd4d4fc, 0xffc4c4c4, 0xffc4c4c4, 0xff343464, 0xff343464, 
        0xffccccfc, 0xffc4c4c4, 0xff343464, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xff343464, 0xffccccfc, 0xff040404, 
        0xff6464cc, 0xff6464cc, 0xff343464, 0xffccccfc, 0xff040404, 0xff343464, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xff343464, 0xffccccfc, 0xff040404, 0xff6464cc, 0xff6464cc, 
        0xff343464, 0xffccccfc, 0xff040404, 0xff343464, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xff343464, 0xffccccfc, 
        0xffc4c4c4, 0xff6464cc, 0xff343464, 0xff343464, 0xffccccfc, 0xffc4c4c4, 
        0xff343464, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xff343464, 0xff040404, 0xff6464cc, 0xff343464, 
        0xff343464, 0xff343464, 0xff343464, 0xff343464, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xff343464, 0xff343464, 0xff343464, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 
        0xfcfcfc, 0xfcfcfc, 0xfcfcfc, 0xfcfcfc
    };

static int retrieveWidth = 16;
static int retrieveHeight = 16;
static int[] retrieveData = {
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xff008000, 0xff008000, 
0xff008000, 0xff008000, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 
0xff008000, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xff008000, 0xff008000, 
0xff008000, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 
0xff008000, 0xff008000, 0xff008000, 0xff008000, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xff008000, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 
0xff008000, 0xff008000, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xff008000, 0xff008000, 
0xff008000, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xff008000, 0xff008000, 0xff008000, 
0xff008000, 0xff008000, 0xff008000, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xff008000, 0xff008000, 0xff008000, 0xff008000, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 0xffffff, 
0xffffff, 0xffffff, 0xffffff, 0xffffff
};

static int pageWidth = 16;
static int pageHeight = 16;
static int[] pageData = {
0xffff, 0xff000000, 0xff000000, 0xff000000, 0xff000000, 0xff000000, 
0xff000000, 0xff000000, 0xff000000, 0xff000000, 0xff000000, 0xff000000, 
0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xff343434, 
0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 
0xfffcfcfc, 0xfffcfcfc, 0xff343434, 0xffffffff, 0xff000000, 0xffff, 
0xffff, 0xffff, 0xffff, 0xff343434, 0xfffcfcfc, 0xff343434, 
0xff343434, 0xff343434, 0xff343434, 0xff343434, 0xfffcfcfc, 0xfffcfcfc, 
0xff343434, 0xffffffff, 0xffffffff, 0xff343434, 0xffff, 0xffff, 
0xffff, 0xff343434, 0xfffcfcfc, 0xff343434, 0xfffccc34, 0xfffccc34, 
0xff64ccfc, 0xff64ccfc, 0xfffcfcfc, 0xfffcfcfc, 0xff343434, 0xffffffff, 
0xffffffff, 0xffffffff, 0xff343434, 0xffff, 0xffff, 0xff343434, 
0xfffcfcfc, 0xff343434, 0xff64ccfc, 0xff64ccfc, 0xff64ccfc, 0xff64ccfc, 
0xfffcfcfc, 0xfffcfcfc, 0xff040404, 0xff040404, 0xff040404, 0xff040404, 
0xff040404, 0xffff, 0xffff, 0xff343434, 0xfffcfcfc, 0xff343434, 
0xff9c6434, 0xff9c6434, 0xff9c6434, 0xff9c6434, 0xfffcfcfc, 0xfffcfcfc, 
0xfffcfcfc, 0xfffcfcfc, 0xffffffff, 0xff000000, 0xff9c9c9c, 0xffff, 
0xffff, 0xff343434, 0xfffcfcfc, 0xff343434, 0xff9c6434, 0xff9c6434, 
0xff9c6434, 0xff9c6434, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 
0xfffcfcfc, 0xff000000, 0xff9c9c9c, 0xffff, 0xffff, 0xff343434, 
0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 
0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xff000000, 
0xff9c9c9c, 0xffff, 0xffff, 0xff343434, 0xfffcfcfc, 0xff040404, 
0xff040404, 0xff040404, 0xff040404, 0xff040404, 0xff040404, 0xff040404, 
0xff040404, 0xff040404, 0xfffcfcfc, 0xff000000, 0xff9c9c9c, 0xffff, 
0xffff, 0xff343434, 0xfffcfcfc, 0xffffffff, 0xffffffff, 0xffffffff, 
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 
0xfffcfcfc, 0xff000000, 0xff9c9c9c, 0xffff, 0xffff, 0xff343434, 
0xffffffff, 0xffffffff, 0xfffcfcfc, 0xfffc3434, 0xfffcfcfc, 0xff040404, 
0xff040404, 0xff040404, 0xff040404, 0xff040404, 0xfffcfcfc, 0xff000000, 
0xff9c9c9c, 0xffff, 0xffff, 0xff343434, 0xfffcfcfc, 0xfffcfcfc, 
0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 
0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xff000000, 0xff9c9c9c, 0xffff, 
0xffff, 0xff343434, 0xfffcfcfc, 0xfffcfcfc, 0xfffcfcfc, 0xfffc3434, 
0xfffcfcfc, 0xff000000, 0xff000000, 0xff040404, 0xff040404, 0xff040404, 
0xfffcfcfc, 0xff000000, 0xff9c9c9c, 0xffff, 0xffff, 0xff343434, 
0xfffcfcfc, 0xfffcfcfc, 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 
0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff, 0xfffcfcfc, 0xff000000, 
0xff9c9c9c, 0xffff, 0xffff, 0xff000000, 0xff000000, 0xff000000, 
0xff000000, 0xff000000, 0xff000000, 0xff000000, 0xff000000, 0xff000000, 
0xff000000, 0xff000000, 0xff000000, 0xff000000, 0xff9c9c9c, 0xffff, 
0xffff, 0xffff, 0xff9c9c9c, 0xff9c9c9c, 0xff9c9c9c, 0xff9c9c9c, 
0xff9c9c9c, 0xff9c9c9c, 0xff9c9c9c, 0xff9c9c9c, 0xff9c9c9c, 0xff9c9c9c, 
0xff9c9c9c, 0xff9c9c9c, 0xffff, 0xffff
};
  
    static {
        Toolkit tkit = Toolkit.getDefaultToolkit ();
        defaultPageIcon = tkit.createImage (
            new MemoryImageSource (pageWidth, pageHeight, 
                                   pageData, 0, pageWidth));
        defaultLinkIcon = tkit.createImage (
            new MemoryImageSource (linkWidth, linkHeight, 
                                   linkData, 0, linkWidth));
        defaultRetrievingIcon = tkit.createImage (
            new MemoryImageSource (retrieveWidth, retrieveHeight, 
                                   retrieveData, 0, retrieveWidth));
        defaultErrorIcon = tkit.createImage (
            new MemoryImageSource (errorWidth, errorHeight, 
                                   errorData, 0, errorWidth));
    }    

}