# Uses of Class
java.time.ZoneId

Packages that use ZoneId
Package | Description
--- | ---
java.time | The main API for dates, times, instants, and durations.
java.time.chrono | Generic API for calendar systems other than the default ISO.
java.time.format | Provides classes to print and parse dates and times.
java.time.temporal | Access to date and time using fields and units, and date time adjusters.
java.util | Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.

## Uses of ZoneId in java.time

Subclasses of ZoneId in java.time
Modifier and Type | Class | Description
--- | --- | ---
`class` | `ZoneOffset` | A time-zone offset from Greenwich/UTC, such as `+02:00`.

Methods in java.time that return ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`static ZoneId` | ZoneId.`from​(TemporalAccessor temporal)` | Obtains an instance of `ZoneId` from a temporal object.
`abstract ZoneId` | Clock.`getZone()` | Gets the time-zone being used to create dates and times.
`ZoneId` | ZonedDateTime.`getZone()` | Gets the time-zone, such as 'Europe/Paris'.
`ZoneId` | ZoneId.`normalized()` | Normalizes the time-zone ID, returning a `ZoneOffset` where possible.
`static ZoneId` | ZoneId.`of​(String zoneId)` | Obtains an instance of `ZoneId` from an ID ensuring that the ID is valid and available for use.
`static ZoneId` | ZoneId.`of​(String zoneId, Map<String,​String> aliasMap)` | Obtains an instance of `ZoneId` using its ID using a map of aliases to supplement the standard zone IDs.
`static ZoneId` | ZoneId.`ofOffset​(String prefix, ZoneOffset offset)` | Obtains an instance of `ZoneId` wrapping an offset.
`static ZoneId` | ZoneId.`systemDefault()` | Gets the system default time-zone.

Methods in java.time with parameters of type ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`ZonedDateTime` | LocalDate.`atStartOfDay​(ZoneId zone)` | Returns a zoned date-time from this date at the earliest valid time according to the rules in the time-zone.
`ZonedDateTime` | Instant.`atZone​(ZoneId zone)` | Combines this instant with a time-zone to create a `ZonedDateTime`.
`ZonedDateTime` | LocalDateTime.`atZone​(ZoneId zone)` | Combines this date-time with a time-zone to create a `ZonedDateTime`.
`ZonedDateTime` | OffsetDateTime.`atZoneSameInstant​(ZoneId zone)` | Combines this date-time with a time-zone to create a `ZonedDateTime` ensuring that the result has the same instant.
`ZonedDateTime` | OffsetDateTime.`atZoneSimilarLocal​(ZoneId zone)` | Combines this date-time with a time-zone to create a `ZonedDateTime` trying to keep the same local date and time.
`static Clock` | Clock.`fixed​(Instant fixedInstant, ZoneId zone)` | Obtains a clock that always returns the same instant.
`static LocalDate` | LocalDate.`now​(ZoneId zone)` | Obtains the current date from the system clock in the specified time-zone.
`static LocalDateTime` | LocalDateTime.`now​(ZoneId zone)` | Obtains the current date-time from the system clock in the specified time-zone.
`static LocalTime` | LocalTime.`now​(ZoneId zone)` | Obtains the current time from the system clock in the specified time-zone.
`static MonthDay` | MonthDay.`now​(ZoneId zone)` | Obtains the current month-day from the system clock in the specified time-zone.
`static OffsetDateTime` | OffsetDateTime.`now​(ZoneId zone)` | Obtains the current date-time from the system clock in the specified time-zone.
`static OffsetTime` | OffsetTime.`now​(ZoneId zone)` | Obtains the current time from the system clock in the specified time-zone.
`static Year` | Year.`now​(ZoneId zone)` | Obtains the current year from the system clock in the specified time-zone.
`static YearMonth` | YearMonth.`now​(ZoneId zone)` | Obtains the current year-month from the system clock in the specified time-zone.
`static ZonedDateTime` | ZonedDateTime.`now​(ZoneId zone)` | Obtains the current date-time from the system clock in the specified time-zone.
`static ZonedDateTime` | ZonedDateTime.`of​(int year, int month, int dayOfMonth, int hour, int minute, int second, int nanoOfSecond, ZoneId zone)` | Obtains an instance of `ZonedDateTime` from a year, month, day, hour, minute, second, nanosecond and time-zone.
`static ZonedDateTime` | ZonedDateTime.`of​(LocalDate date, LocalTime time, ZoneId zone)` | Obtains an instance of `ZonedDateTime` from a local date and time.
`static ZonedDateTime` | ZonedDateTime.`of​(LocalDateTime localDateTime, ZoneId zone)` | Obtains an instance of `ZonedDateTime` from a local date-time.
`static LocalDate` | LocalDate.`ofInstant​(Instant instant, ZoneId zone)` | Obtains an instance of `LocalDate` from an `Instant` and zone ID.
`static LocalDateTime` | LocalDateTime.`ofInstant​(Instant instant, ZoneId zone)` | Obtains an instance of `LocalDateTime` from an `Instant` and zone ID.
`static LocalTime` | LocalTime.`ofInstant​(Instant instant, ZoneId zone)` | Obtains an instance of `LocalTime` from an `Instant` and zone ID.
`static OffsetDateTime` | OffsetDateTime.`ofInstant​(Instant instant, ZoneId zone)` | Obtains an instance of `OffsetDateTime` from an `Instant` and zone ID.
`static OffsetTime` | OffsetTime.`ofInstant​(Instant instant, ZoneId zone)` | Obtains an instance of `OffsetTime` from an `Instant` and zone ID.
`static ZonedDateTime` | ZonedDateTime.`ofInstant​(Instant instant, ZoneId zone)` | Obtains an instance of `ZonedDateTime` from an `Instant`.
`static ZonedDateTime` | ZonedDateTime.`ofInstant​(LocalDateTime localDateTime, ZoneOffset offset, ZoneId zone)` | Obtains an instance of `ZonedDateTime` from the instant formed by combining the local date-time and offset.
`static ZonedDateTime` | ZonedDateTime.`ofLocal​(LocalDateTime localDateTime, ZoneId zone, ZoneOffset preferredOffset)` | Obtains an instance of `ZonedDateTime` from a local date-time using the preferred offset if possible.
`static ZonedDateTime` | ZonedDateTime.`ofStrict​(LocalDateTime localDateTime, ZoneOffset offset, ZoneId zone)` | Obtains an instance of `ZonedDateTime` strictly validating the combination of local date-time, offset and zone ID.
`static Clock` | Clock.`system​(ZoneId zone)` | Obtains a clock that returns the current instant using the best available system clock.
`static Clock` | Clock.`tickMillis​(ZoneId zone)` | Obtains a clock that returns the current instant ticking in whole milliseconds using the best available system clock.
`static Clock` | Clock.`tickMinutes​(ZoneId zone)` | Obtains a clock that returns the current instant ticking in whole minutes using the best available system clock.
`static Clock` | Clock.`tickSeconds​(ZoneId zone)` | Obtains a clock that returns the current instant ticking in whole seconds using the best available system clock.
`abstract Clock` | Clock.`withZone​(ZoneId zone)` | Returns a copy of this clock with a different time-zone.
`ZonedDateTime` | ZonedDateTime.`withZoneSameInstant​(ZoneId zone)` | Returns a copy of this date-time with a different time-zone, retaining the instant.
`ZonedDateTime` | ZonedDateTime.`withZoneSameLocal​(ZoneId zone)` | Returns a copy of this date-time with a different time-zone, retaining the local date-time if possible.

## Uses of ZoneId in java.time.chrono

Methods in java.time.chrono that return ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`ZoneId` | ChronoZonedDateTime.`getZone()` | Gets the zone ID, such as 'Europe/Paris'.

Methods in java.time.chrono with parameters of type ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`ChronoZonedDateTime<D>` | ChronoLocalDateTime.`atZone​(ZoneId zone)` | Combines this time with a time-zone to create a `ChronoZonedDateTime`.
`default ChronoLocalDate` | Chronology.`dateNow​(ZoneId zone)` | Obtains the current local date in this chronology from the system clock in the specified time-zone.
`HijrahDate` | HijrahChronology.`dateNow​(ZoneId zone)` |
`LocalDate` | IsoChronology.`dateNow​(ZoneId zone)` | Obtains the current ISO local date from the system clock in the specified time-zone.
`JapaneseDate` | JapaneseChronology.`dateNow​(ZoneId zone)` |
`MinguoDate` | MinguoChronology.`dateNow​(ZoneId zone)` |
`ThaiBuddhistDate` | ThaiBuddhistChronology.`dateNow​(ZoneId zone)` |
`static HijrahDate` | HijrahDate.`now​(ZoneId zone)` | Obtains the current `HijrahDate` of the Islamic Umm Al-Qura calendar in the specified time-zone.
`static JapaneseDate` | JapaneseDate.`now​(ZoneId zone)` | Obtains the current `JapaneseDate` from the system clock in the specified time-zone.
`static MinguoDate` | MinguoDate.`now​(ZoneId zone)` | Obtains the current `MinguoDate` from the system clock in the specified time-zone.
`static ThaiBuddhistDate` | ThaiBuddhistDate.`now​(ZoneId zone)` | Obtains the current `ThaiBuddhistDate` from the system clock in the specified time-zone.
`ChronoZonedDateTime<D>` | ChronoZonedDateTime.`withZoneSameInstant​(ZoneId zone)` | Returns a copy of this date-time with a different time-zone, retaining the instant.
`ChronoZonedDateTime<D>` | ChronoZonedDateTime.`withZoneSameLocal​(ZoneId zone)` | Returns a copy of this date-time with a different time-zone, retaining the local date-time if possible.
`default ChronoZonedDateTime<? extends ChronoLocalDate>` | Chronology.`zonedDateTime​(Instant instant, ZoneId zone)` | Obtains a `ChronoZonedDateTime` in this chronology from an `Instant`.
`ChronoZonedDateTime<HijrahDate>` | HijrahChronology.`zonedDateTime​(Instant instant, ZoneId zone)` |
`ZonedDateTime` | IsoChronology.`zonedDateTime​(Instant instant, ZoneId zone)` | Obtains an ISO zoned date-time in this chronology from an `Instant`.
`ChronoZonedDateTime<JapaneseDate>` | JapaneseChronology.`zonedDateTime​(Instant instant, ZoneId zone)` |
`ChronoZonedDateTime<MinguoDate>` | MinguoChronology.`zonedDateTime​(Instant instant, ZoneId zone)` |
`ChronoZonedDateTime<ThaiBuddhistDate>` | ThaiBuddhistChronology.`zonedDateTime​(Instant instant, ZoneId zone)` |

## Uses of ZoneId in java.time.format

Methods in java.time.format that return ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`ZoneId` | DateTimeFormatter.`getZone()` | Gets the overriding zone to be used during formatting.

Methods in java.time.format with parameters of type ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`DateTimeFormatter` | DateTimeFormatter.`withZone​(ZoneId zone)` | Returns a copy of this formatter with a new override zone.

Method parameters in java.time.format with type arguments of type ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`DateTimeFormatterBuilder` | DateTimeFormatterBuilder.`appendGenericZoneText​(TextStyle textStyle, Set<ZoneId> preferredZones)` | Appends the generic time-zone name, such as 'Pacific Time', to the formatter.
`DateTimeFormatterBuilder` | DateTimeFormatterBuilder.`appendZoneText​(TextStyle textStyle, Set<ZoneId> preferredZones)` | Appends the time-zone name, such as 'British Summer Time', to the formatter.

## Uses of ZoneId in java.time.temporal

Methods in java.time.temporal that return types with arguments of type ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`static TemporalQuery<ZoneId>` | TemporalQueries.`zone()` | A lenient query for the `ZoneId`, falling back to the `ZoneOffset`.
`static TemporalQuery<ZoneId>` | TemporalQueries.`zoneId()` | A strict query for the `ZoneId`.

## Uses of ZoneId in java.util

Methods in java.util that return ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`ZoneId` | TimeZone.`toZoneId()` | Converts this `TimeZone` object to a `ZoneId`.

Methods in java.util with parameters of type ZoneId
Modifier and Type | Method | Description
--- | --- | ---
`static TimeZone` | TimeZone.`getTimeZone​(ZoneId zoneId)` | Gets the `TimeZone` for the given `zoneId`.