Παράδειγμα: εύρεση ημέρας (main)

•   public static void main(String args[]) throws Exception {
      // Are appropriate arguments given?
      if (args.length != 3) {
        System.err.println("usage: FindDay year month day");
        System.exit(1);
      }
  
      // Parse year, month, day
      int year = Integer.parseInt(args[0]);
      int month = Integer.parseInt(args[1]) - 1;
      int monthDay = Integer.parseInt(args[2]);
  
      // Set the calendar and calculate the day name
      GregorianCalendar d = new GregorianCalendar(year, month, monthDay);
      String dn = weekDayName(d.get(Calendar.DAY_OF_WEEK));
  
      // Create an output channel for Greek characters
      PrintWriter out = new PrintWriter(
        new OutputStreamWriter(System.out, "utf-8"), true);
      // Print the day name
      out.println(dn);
    }