BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

       String oldDate = reader.readLine();
       SimpleDateFormat oldDateFormat = new SimpleDateFormat("dd/MM/yyyy", Locale.getDefault());
       SimpleDateFormat newDateFormat = new SimpleDateFormat("MMM dd, yyyy", Locale.CANADA);

       Date date = oldDateFormat.parse(oldDate);
       String newDate = newDateFormat.format(date).toUpperCase();

       System.out.println(newDate);