java.time.temporal

---

1. Creating a Temporal

LocalDateTime now = LocalDateTime.now();

2. Getting a Field from a Temporal

int year = now.getYear();

3. Setting a Field on a Temporal

LocalDateTime newDate = now.withYear(2020);

4. Adding to a Temporal

LocalDateTime newDate = now.plusYears(1);

5. Subtracting from a Temporal

LocalDateTime newDate = now.minusYears(1);

6. Comparing Temporals

boolean isAfter = now.isAfter(newDate);

7. Checking if a Temporal is Valid

boolean isValid = now.isValid();

8. Getting the Chronology of a Temporal

Chronology chronology = now.getChronology();

9. Converting a Temporal to another Date/Time API

Date date = now.toDate();

10. Creating a TemporalAdjuster

TemporalAdjuster adjuster = TemporalAdjusters.firstDayOfMonth();

11. Applying a TemporalAdjuster

LocalDateTime newDate = now.with(adjuster);

12. Creating a TemporalQuery

TemporalQuery<Integer> query = TemporalQueries.year();

13. Getting a Value from a Temporal using a TemporalQuery

int year = now.query(query);

14. Creating a TemporalUnit

TemporalUnit unit = ChronoUnit.DAYS;

15. Adding a TemporalUnit

LocalDateTime newDate = now.plus(1, unit);

16. Subtracting a TemporalUnit

LocalDateTime newDate = now.minus(1, unit);

17. Calculating the Difference between two Temporals

long days = ChronoUnit.DAYS.between(now, newDate);

18. Creating a ZoneId

ZoneId zoneId = ZoneId.of("Europe/Paris");

19. Getting the TimeZone from a ZoneId

TimeZone timeZone = zoneId.toTimeZone();

20. Creating a ZonedDateTime

ZonedDateTime zonedDateTime = ZonedDateTime.now(zoneId);

21. Converting a ZonedDateTime to a LocalDateTime

LocalDateTime localDateTime = zonedDateTime.toLocalDateTime();

22. Creating a DateTimeFormatter

DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");

23. Parsing a String into a Temporal

LocalDateTime parsedDate = LocalDateTime.parse("2020-01-01", formatter);

24. Formatting a Temporal into a String

String formattedDate = now.format(formatter);

25. Creating a TemporalAmount

TemporalAmount amount = Period.ofDays(1);

26. Adding a TemporalAmount

LocalDateTime newDate = now.plus(amount);

27. Subtracting a TemporalAmount

LocalDateTime newDate = now.minus(amount);

28. Calculating the Duration between two Temporals

Duration duration = Duration.between(now, newDate);

29. Creating a ChronoField

ChronoField field = ChronoField.DAY_OF_MONTH;

30. Getting the Value of a ChronoField

int dayOfMonth = now.get(field);

31. Setting the Value of a ChronoField

LocalDateTime newDate = now.with(field, 1);

32. Creating a ChronoUnit

ChronoUnit unit = ChronoUnit.MONTHS;

33. Adding a ChronoUnit

LocalDateTime newDate = now.plus(1, unit);

34. Subtracting a ChronoUnit

LocalDateTime newDate = now.minus(1, unit);

35. Creating a ZoneOffset

ZoneOffset offset = ZoneOffset.of("+01:00");

36. Getting the Hours from a ZoneOffset

int hours = offset.getTotalSeconds() / 3600;

37. Converting a ZoneOffset to a ZoneId

ZoneId zoneId = offset.toZoneId();

38. Creating a Year

Year year = Year.of(2020);

39. Getting the Value of a Year

int yearValue = year.getValue();

40. Creating a Month

Month month = Month.JANUARY;

41. Getting the Value of a Month

int monthValue = month.getValue();

42. Creating a DayOfWeek

DayOfWeek dayOfWeek = DayOfWeek.MONDAY;

43. Getting the Value of a DayOfWeek

int dayOfWeekValue = dayOfWeek.getValue();

44. Creating a Duration