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  1. import java.time.DayOfWeek;
  2. import java.time.ZonedDateTime;
  3. import java.time.temporal.TemporalAdjusters;
  4.  
  5. public class Main {
  6. 	public static void main(String[] args) {
  7. 		// Test
  8. 		System.out.println(whichDowOfTheMonth("2021-06-10T13:30:30+03:00"));
  9. 		System.out.println(whichDowOfTheMonth("2021-06-17T13:30:30+03:00"));
  10. 		System.out.println(whichDowOfTheMonth("2021-06-24T13:30:30+03:00"));
  11. 	}
  12.  
  13. 	static int whichDowOfTheMonth(String strDateTime) {
  14. 		ZonedDateTime zdt = ZonedDateTime.parse(strDateTime);
  15. 		DayOfWeek dow = zdt.getDayOfWeek();
  16.  
  17. 		ZonedDateTime zdtFirstDowOfMonth = zdt.with(TemporalAdjusters.firstInMonth(dow));
  18. 		ZonedDateTime zdtLastDayOfMonth = zdt.with(TemporalAdjusters.lastDayOfMonth());
  19.  
  20. 		int count = 1;
  21. 		for (ZonedDateTime date = zdtFirstDowOfMonth; !date.isAfter(zdtLastDayOfMonth); date = date.plusDays(7)) {
  22. 			if (date.equals(zdt))
  23. 				break;
  24. 			count++;
  25. 		}
  26. 		return count;
  27. 	}
  28. }
Success #stdin #stdout 0.09s 49688KB
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https://ideone.com/PTLJwf
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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