class comp implements Comparator<String>
    {
        public int compare(Printing print1, Printing print2)
        {
            String title1 = print1.getTitle();
            String title2 = print2.getTitle();
            return title1.compareTo(title2);
        }

        public int compare(String o1, String o2) {
            // TODO Auto-generated method stub
            return 0;
        }
    }