public class GetURLs {
    /** The tag reader */
    ReadTag reader;

    public GetURLs(URL theURL) throws IOException {
        reader = new ReadTag(theURL);
    }

    public GetURLs(String theURL) throws MalformedURLException, IOException {
        reader = new ReadTag(theURL);
    }

    /* The tags we want to look at */
    public final static String[] wantTags = {
        "<a ", "<A ",
        "<applet ", "<APPLET ",
        "<img ", "<IMG ",
        "<frame ", "<FRAME ",
    };

    public ArrayList getURLs(  ) throws IOException {
        ArrayList al = new ArrayList(  );
        String tag;
        while ((tag = reader.nextTag(  )) != null) {
            for (int i=0; i<wantTags.length; i++) {
                if (tag.startsWith(wantTags[i])) {
                    al.add(tag);
                    continue;        // optimization
                }
            }
        }
        return al;
    }

    public void close(  ) throws IOException {
        if (reader != null) 
            reader.close(  );
    }
    public static void main(String[] argv) throws 
            MalformedURLException, IOException {
        String theURL = argv.length == 0 ?
            "http://localhost/" : argv[0];
        GetURLs gu = new GetURLs(theURL);
        ArrayList urls = gu.getURLs(  );
        Iterator urlIterator = urls.iterator(  );
        while (urlIterator.hasNext(  )) {
            System.out.println(urlIterator.next(  ));
        }
    }
}