gistfile1.java

Desktop desktop = Desktop.isDesktopSupported() ? Desktop.getDesktop() : null;
        if (desktop != null && desktop.isSupported(Desktop.Action.BROWSE))
        {
            try
            {
                new URI(url);
                btnOpenBrowser.setEnabled(true);
                btnCopyLink.setEnabled(true);
            }
            catch (URISyntaxException e)
            {
                btnOpenBrowser.setEnabled(false);
                btnCopyLink.setEnabled(false);
            }
        }