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  1. import static java.time.DayOfWeek.SATURDAY;
  2. import static java.time.DayOfWeek.SUNDAY;
  3.  
  4. import java.time.DayOfWeek;
  5. import java.time.LocalDate;
  6. import java.time.LocalTime;
  7. import java.time.ZoneId;
  8. import java.time.ZonedDateTime;
  9. import java.time.format.TextStyle;
  10. import java.time.temporal.ChronoUnit;
  11. import java.time.temporal.TemporalAdjusters;
  12. import java.util.Locale;
  13.  
  14. public class Main {
  15. 	public static void main(String[] args) {
  16. 		// Tests
  17. 		process(ZonedDateTime.now(ZoneId.systemDefault()));
  18. 		process(ZonedDateTime.of(LocalDate.of(2021, 6, 23), LocalTime.of(10, 20, 30, 123456789),
  19. 				ZoneId.systemDefault()));
  20. 		process(ZonedDateTime.of(LocalDate.of(2021, 6, 26), LocalTime.of(10, 20, 30, 123456789),
  21. 				ZoneId.systemDefault()));
  22. 	}
  23.  
  24. 	static long millisBetween(ZonedDateTime start, ZonedDateTime end) {
  25. 		return ChronoUnit.MILLIS.between(start, end);
  26. 	}
  27.  
  28. 	static boolean isWeekend(ZonedDateTime now) {
  29. 		DayOfWeek dow = now.getDayOfWeek();
  30. 		return dow == SATURDAY || dow == SUNDAY;
  31. 	}
  32.  
  33. 	static void process(ZonedDateTime now) {
  34. 		String dow = now.getDayOfWeek().getDisplayName(TextStyle.FULL, Locale.ENGLISH);
  35. 		if (isWeekend(now)) {
  36. 			System.out.printf("It's %s (a weekend) now. Monday is %d milliseconds ahead.%n", dow,
  37. 					millisBetween(now, now.with(TemporalAdjusters.next(DayOfWeek.MONDAY)).toLocalDate()
  38. 							.atStartOfDay(ZoneId.systemDefault())));
  39. 		} else {
  40. 			System.out.printf("It's %s (a weekday) now. Saturday is %d milliseconds ahead.%n", dow,
  41. 					millisBetween(now, now.with(TemporalAdjusters.next(DayOfWeek.SATURDAY)).toLocalDate()
  42. 							.atStartOfDay(ZoneId.systemDefault())));
  43. 		}
  44. 	}
  45. }
Success #stdin #stdout 0.12s 52688KB
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Standard input is empty
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It's Sunday (a weekend) now. Monday is 33799715 milliseconds ahead.
It's Wednesday (a weekday) now. Saturday is 221969876 milliseconds ahead.
It's Saturday (a weekend) now. Monday is 135569876 milliseconds ahead.
https://ideone.com/iZwO1K
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
secret

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