Java tutorial
import java.util.BitSet; public class HolidaySked { BitSet sked; public HolidaySked() { sked = new BitSet(365); int[] holiday = { 1, 15, 50, 148, 185, 246, 281, 316, 326, 359 }; for (int i = 0; i < holiday.length; i++) { addHoliday(holiday[i]); } } public void addHoliday(int dayToAdd) { sked.set(dayToAdd); } public boolean isHoliday(int dayToCheck) { boolean result = sked.get(dayToCheck); return result; } public static void main(String[] arguments) { HolidaySked cal = new HolidaySked(); if (arguments.length > 0) { try { int whichDay = Integer.parseInt(arguments[0]); if (cal.isHoliday(whichDay)) { System.out.println("Day number " + whichDay + " is a holiday."); } else { System.out.println("Day number " + whichDay + " is not a holiday."); } } catch (NumberFormatException nfe) { System.out.println("Error: " + nfe.getMessage()); } } } }