public static void main(String[] args) {
  System.out.println(from3rd("harsh harsh"));
}

private static Pattern p = Pattern.compile("(/[^/]*){2}harsh([^/]*)");

public static String from3rd(String in) {
    Matcher m = p.matcher(in);

    if (m.matches())
        return m.group(2);
    else
        return null;
}