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  1.  
  2. import java.util.Calendar;
  3. import java.util.Date;
  4.  
  5.  
  6.  
  7. public class Main{
  8. 	public static void main(String[] args) {
  9. 		Calendar startDateCal = Calendar.getInstance();
  10. 		startDateCal.set(Calendar.YEAR, 1901);
  11. 		startDateCal.set(Calendar.MONTH, 0);
  12. 		startDateCal.set(Calendar.DATE, 1);
  13.  
  14. 		Calendar endDateCal = Calendar.getInstance();
  15. 		endDateCal.set(Calendar.YEAR, 2000);
  16. 		endDateCal.set(Calendar.MONTH, 11);
  17. 		endDateCal.set(Calendar.DATE, 31);
  18. 		checkSundays(startDateCal.getTime(), endDateCal.getTime());
  19.  
  20. 	}
  21.  
  22. 	private static void checkSundays(Date start, Date end) {
  23. 		int dayNum;
  24.  
  25. 		Calendar startDate = Calendar.getInstance();
  26. 		startDate.setTime(start);
  27.  
  28. 		Calendar endDate = Calendar.getInstance();
  29. 		endDate.setTime(end);
  30. 		int count = 0;
  31.  
  32. 		while (startDate.before(endDate)) {
  33.  
  34. 			dayNum = startDate.get(Calendar.DAY_OF_WEEK);
  35. 			if (dayNum == 1) {
  36. 				count++;
  37. 			}
  38.  
  39.  
  40. 			startDate.add(Calendar.MONTH, 1);
  41.  
  42.  
  43.  
  44. 		}
  45. 		System.out.println("Count " + count);
  46. 	}
  47.  
  48. }
  49.  
Success #stdin #stdout 0.08s 246592KB
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Count 171
https://ideone.com/AdINY
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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