code: protected void handleUrlActivated(HyperlinkEvent e, URL url) {
          try {
              Desktop.getDesktop().browse(url.toURI());
          } catch (Exception ex) {
              throw new ApplicationException("Error handling URL " + url, ex);
          }
      }
docs: Called when the user clicks on a URL link e.g. <br>
  &lt;a href=&quot;http://some.site&quot;&gt;Go to Some Site&lt;/a&gt;.
  <p>
  This default implementation attempt to open the link in the systems
  default browser.