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  • package java
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    root
  • 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
  • Ser
  • ServiceLoaderZoneRulesInitializer
  • StandardZoneRules
  • ZoneMap
  • ZoneOffsetTransition
  • ZoneOffsetTransitionRule
  • ZoneRules
  • ZoneRulesBuilder
  • ZoneRulesException
  • ZoneRulesInitializer
  • ZoneRulesProvider

object ZoneRules

The rules defining how the zone offset varies for a single time-zone.

The rules model all the historic and future transitions for a time-zone. ZoneOffsetTransition is used for known transitions, typically historic. ZoneOffsetTransitionRule is used for future transitions that are based on the result of an algorithm.

The rules are loaded via ZoneRulesProvider using a ZoneId. The same rules may be shared internally between multiple zone IDs.

Serializing an instance of ZoneRules will store the entire set of rules. It does not store the zone ID as it is not part of the state of this object.

A rule implementation may or may not store full information about historic and future transitions, and the information stored is only as accurate as that supplied to the implementation by the rules provider. Applications should treat the data provided as representing the best information available to the implementation of this rule.

Specification for implementors

The supplied implementations of this class are immutable and thread-safe.

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  15. def of(offset: ZoneOffset): ZoneRules

    Obtains an instance of ZoneRules that always uses the same offset.

    Obtains an instance of ZoneRules that always uses the same offset.

    The returned rules always have the same offset.

    offset

    the offset, not null

    returns

    the zone rules, not null

  16. def of(baseStandardOffset: ZoneOffset, baseWallOffset: ZoneOffset, standardOffsetTransitionList: List[ZoneOffsetTransition], transitionList: List[ZoneOffsetTransition], lastRules: List[ZoneOffsetTransitionRule]): ZoneRules

    Obtains an instance of ZoneRules with full transition rules.

    Obtains an instance of ZoneRules with full transition rules.

    baseStandardOffset

    the standard offset to use before legal rules were set, not null

    baseWallOffset

    the wall offset to use before legal rules were set, not null

    standardOffsetTransitionList

    the list of changes to the standard offset, not null

    transitionList

    the list of transitions, not null

    lastRules

    the recurring last rules, size 16 or less, not null

    returns

    the zone rules, not null

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