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  1. import java.time.DayOfWeek;
  2. import java.time.Instant;
  3. import java.time.LocalDate;
  4. import java.time.ZoneId;
  5. import java.time.ZonedDateTime;
  6. import java.time.temporal.TemporalAdjusters;
  7. import java.util.stream.Stream;
  8.  
  9. public class Main {
  10. 	public static void main(String[] args) {
  11. 		// Test
  12. 		Stream.of(
  13. 					1621533017083L,
  14. 					1621446617083L,
  15. 					1621619417083L,
  16. 					1621189684296L,
  17. 					1621209600000L,
  18. 					1621814400000L
  19. 		).forEach(millis -> {
  20. 			System.out.println(millis);
  21. 			System.out.println(Instant.ofEpochMilli(millis));
  22. 			System.out.println("Today: " + isToday(millis, "Europe/London"));
  23. 			System.out.println("Yesterday: " + isYesterday(millis, "Europe/London"));
  24. 			System.out.println("In the current week: " + isInTheSameWeek(millis, "Europe/London"));
  25. 			System.out.println();
  26. 		});
  27. 	}
  28.  
  29. 	static boolean isToday(long epochMillis, String timezone) {
  30. 		ZoneId zoneId = ZoneId.of(timezone);
  31.  
  32. 		// The start of the day today at this timezone
  33. 		ZonedDateTime zdtStartOfDayToday = LocalDate.now().atStartOfDay(zoneId);
  34. 		long millisStartOfDayToday = zdtStartOfDayToday.toInstant().toEpochMilli();
  35.  
  36. 		// The start of the next day at this timezone
  37. 		ZonedDateTime zdtStartOfDayNextDay = LocalDate.now().plusDays(1).atStartOfDay(zoneId);
  38. 		long millisStartOfDayNextDay = zdtStartOfDayNextDay.toInstant().toEpochMilli();
  39.  
  40. 		return (epochMillis >= millisStartOfDayToday && epochMillis < millisStartOfDayNextDay);
  41. 	}
  42.  
  43. 	static boolean isYesterday(long epochMillis, String timezone) {
  44. 		ZoneId zoneId = ZoneId.of(timezone);
  45.  
  46. 		// The start of the day today at this timezone
  47. 		ZonedDateTime zdtStartOfDayToday = LocalDate.now().atStartOfDay(zoneId);
  48. 		long millisStartOfDayToday = zdtStartOfDayToday.toInstant().toEpochMilli();
  49.  
  50. 		// The start of the day yesterday at this timezone
  51. 		ZonedDateTime zdtStartOfDayYesterday = LocalDate.now().minusDays(1).atStartOfDay(zoneId);
  52. 		long millisStartOfDayYesterday = zdtStartOfDayYesterday.toInstant().toEpochMilli();
  53.  
  54. 		return (epochMillis >= millisStartOfDayYesterday && epochMillis < millisStartOfDayToday);
  55. 	}
  56.  
  57. 	static boolean isInTheSameWeek(long epochMillis, String timezone) {
  58. 		ZoneId zoneId = ZoneId.of(timezone);
  59.  
  60. 		// The start of the day today at this timezone
  61. 		ZonedDateTime zdtStartOfDayToday = LocalDate.now().atStartOfDay(zoneId);
  62.  
  63. 		// The start of the week at this timezone
  64. 		ZonedDateTime zdtStartOfTheWeek = zdtStartOfDayToday.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY));
  65. 		long millisStartOfTheWeek = zdtStartOfTheWeek.toInstant().toEpochMilli();
  66.  
  67. 		// The start of the next week at this timezone
  68. 		ZonedDateTime zdtStartOfTheNextWeek = zdtStartOfDayToday.with(TemporalAdjusters.next(DayOfWeek.MONDAY));
  69. 		long millisStartOfTheNextWeek = zdtStartOfTheNextWeek.toInstant().toEpochMilli();
  70.  
  71. 		return (epochMillis >= millisStartOfTheWeek && epochMillis < millisStartOfTheNextWeek);
  72. 	}
  73. }
Success #stdin #stdout 0.16s 55412KB
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stdin
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Standard input is empty
stdout
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1621533017083
2021-05-20T17:50:17.083Z
Today: true
Yesterday: false
In the current week: true

1621446617083
2021-05-19T17:50:17.083Z
Today: false
Yesterday: true
In the current week: true

1621619417083
2021-05-21T17:50:17.083Z
Today: false
Yesterday: false
In the current week: true

1621189684296
2021-05-16T18:28:04.296Z
Today: false
Yesterday: false
In the current week: false

1621209600000
2021-05-17T00:00:00Z
Today: false
Yesterday: false
In the current week: true

1621814400000
2021-05-24T00:00:00Z
Today: false
Yesterday: false
In the current week: false
https://ideone.com/wnn0V9
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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