Parsing a URL

 try {
   URL url = new URL(
     "http://hostname:80/index.html#_top_");
   String protocol = url.getProtocol();    // http
   String host = url.getHost();    // hostname
   int port = url.getPort();    // 80
   String file = url.getFile();    // index.html
   String ref = url.getRef();    // _top_
 } catch (MalformedURLException e) {
 }