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  • package java
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  • package time

    The main API for dates, times, instants, and durations.

    The main API for dates, times, instants, and durations.

    The classes defined here represent the principal date-time concepts, including instants, durations, dates, times, time-zones and periods. They are based on the ISO calendar system, which is the de facto world calendar following the proleptic Gregorian rules. All the classes are immutable and thread-safe.

    Each date time instance is composed of fields that are conveniently made available by the APIs. For lower level access to the fields refer to the org.threeten.bp.temporal package. Each class includes support for printing and parsing all manner of dates and times. Refer to the org.threeten.bp.format package for customization options.

    The org.threeten.bp.chrono package contains the calendar neutral API. This is intended for use by applications that need to use localized calendars. It is recommended that applications use the ISO-8601 dates and time classes from this package across system boundaries, such as to the database or across the network. The calendar neutral API should be reserved for interactions with users.

    Dates and Times

    org.threeten.bp.Instant is essentially a numeric timestamp. The current Instant can be retrieved from a org.threeten.bp.Clock. This is useful for logging and persistence of a point in time and has in the past been associated with storing the result from java.lang.System#currentTimeMillis().

    org.threeten.bp.LocalDate stores a date without a time. This stores a date like '2010-12-03' and could be used to store a birthday.

    org.threeten.bp.LocalTime stores a time without a date. This stores a time like '11:30' and could be used to store an opening or closing time.

    org.threeten.bp.LocalDateTime stores a date and time. This stores a date-time like '2010-12-03T11:30'.

    org.threeten.bp.OffsetTime stores a time and offset from UTC without a date. This stores a date like '11:30+01:00'. The ZoneOffset is of the form '+01:00'.

    org.threeten.bp.OffsetDateTime stores a date and time and offset from UTC. This stores a date-time like '2010-12-03T11:30+01:00'. This is sometimes found in XML messages and other forms of persistence, but contains less information than a full time-zone.

    org.threeten.bp.ZonedDateTime stores a date and time with a time-zone. This is useful if you want to perform accurate calculations of dates and times taking into account the org.threeten.bp.ZoneId, such as 'Europe/Paris'. Where possible, it is recommended to use a simpler class. The widespread use of time-zones tends to add considerable complexity to an application.

    Duration and Period

    Beyond dates and times, the API also allows the storage of period and durations of time. A org.threeten.bp.Duration is a simple measure of time along the time-line in nanoseconds. A org.threeten.bp.Period expresses an amount of time in units meaningful to humans, such as years or hours.

    Additional value types

    org.threeten.bp.Year stores a year on its own. This stores a single year in isolation, such as '2010'.

    org.threeten.bp.YearMonth stores a year and month without a day or time. This stores a year and month, such as '2010-12' and could be used for a credit card expiry.

    org.threeten.bp.MonthDay stores a month and day without a year or time. This stores a month and day-of-month, such as '--12-03' and could be used to store an annual event like a birthday without storing the year.

    org.threeten.bp.Month stores a month on its own. This stores a single month-of-year in isolation, such as 'DECEMBER'.

    org.threeten.bp.DayOfWeek stores a day-of-week on its own. This stores a single day-of-week in isolation, such as 'TUESDAY'.

    Definition Classes
    java
  • package zone

    Support for time-zones and their rules.

    Support for time-zones and their rules.

    Daylight Saving Time and Time-Zones are concepts used by Governments to alter local time. This package provides support for time-zones, their rules and the resulting gaps and overlaps in the local time-line typically caused by Daylight Saving Time.

    Definition Classes
    time
  • DefaultTzdbZoneRulesProvider
  • ServiceLoaderZoneRulesInitializer
  • StandardZoneRules
  • ZoneMap
  • ZoneOffsetTransition
  • ZoneOffsetTransitionRule
  • ZoneRules
  • ZoneRulesBuilder
  • ZoneRulesException
  • ZoneRulesInitializer
  • ZoneRulesProvider

object ZoneOffsetTransitionRule extends Serializable

A rule expressing how to create a transition.

This class allows rules for identifying future transitions to be expressed. A rule might be written in many forms:

  • the 16th March
  • the Sunday on or after the 16th March
  • the Sunday on or before the 16th March
  • the last Sunday in February

These different rule types can be expressed and queried.

Specification for implementors

This class is immutable and thread-safe.

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  15. def of(month: Month, dayOfMonthIndicator: Int, dayOfWeek: DayOfWeek, time: LocalTime, timeEndOfDay: Boolean, timeDefnition: TimeDefinition, standardOffset: ZoneOffset, offsetBefore: ZoneOffset, offsetAfter: ZoneOffset): ZoneOffsetTransitionRule

    Obtains an instance defining the yearly rule to create transitions between two offsets.

    Obtains an instance defining the yearly rule to create transitions between two offsets.

    Applications should normally obtain an instance from ZoneRules. This factory is only intended for use when creating ZoneRules.

    month

    the month of the month-day of the first day of the cutover week, not null

    dayOfMonthIndicator

    the day of the month-day of the cutover week, positive if the week is that day or later, negative if the week is that day or earlier, counting from the last day of the month, from -28 to 31 excluding 0

    dayOfWeek

    the required day-of-week, null if the month-day should not be changed

    time

    the cutover time in the 'before' offset, not null

    timeEndOfDay

    whether the time is midnight at the end of day

    timeDefnition

    how to interpret the cutover

    standardOffset

    the standard offset in force at the cutover, not null

    offsetBefore

    the offset before the cutover, not null

    offsetAfter

    the offset after the cutover, not null

    returns

    the rule, not null

    Exceptions thrown

    IllegalArgumentException if the end of day flag is true when the time is not midnight

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  21. object TimeDefinition extends Serializable

    A definition of the way a local time can be converted to the actual transition date-time.

    A definition of the way a local time can be converted to the actual transition date-time.

    Time zone rules are expressed in one of three ways:

    • Relative to UTC
    • Relative to the standard offset in force
    • Relative to the wall offset (what you would see on a clock on the wall)

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