final CodeSource codeSource = new CodeSource( url, null );
final CodeSource codeSource = new CodeSource( url, (Certificate[])null );
    private CodeSource createDefaultCodeSource()    {        //Create a URL that covers whole file system.        final URL url;        try        {            url = new URL( "file:/-" );        }        catch( final MalformedURLException mue )        {            //will never happen            throw new IllegalStateException( mue.getMessage() );        }        final CodeSource codeSource = new CodeSource( url, null );        return codeSource;    }