HijrahChronology

java.lang.Object
- java.time.chrono.AbstractChronology
- - java.time.chrono.HijrahChronology

所有已实现的接口:

Serializable, Comparable<Chronology>, Chronology
```
public final class HijrahChronology
extends AbstractChronology
implements Serializable
```
The Hijrah calendar is a lunar calendar supporting Islamic calendars.
The HijrahChronology follows the rules of the Hijrah calendar system. The Hijrah calendar has several variants based on differences in when the new moon is determined to have occurred and where the observation is made. In some variants the length of each month is computed algorithmically from the astronomical data for the moon and earth and in others the length of the month is determined by an authorized sighting of the new moon. For the algorithmically based calendars the calendar can project into the future. For sighting based calendars only historical data from past sightings is available.
The length of each month is 29 or 30 days. Ordinary years have 354 days; leap years have 355 days.
CLDR and LDML identify variants:

Chronology ID Calendar Type Locale extension, see Locale Description

Hijrah-umalqura islamic-umalqura ca-islamic-umalqura Islamic - Umm Al-Qura calendar of Saudi Arabia

Additional variants may be available through Chronology#getAvailableChronologies().
Example

Selecting the chronology from the locale uses Chronology#ofLocale to find the Chronology based on Locale supported BCP 47 extension mechanism to request a specific calendar ("ca"). For example,
```
      Locale locale = Locale.forLanguageTag("en-US-u-ca-islamic-umalqura");
      Chronology chrono = Chronology.ofLocale(locale);
 
```
从以下版本开始:

1.8

另请参阅:

序列化表格

Chronology ID	Calendar Type	Locale extension, see `Locale`	Description
Hijrah-umalqura	islamic-umalqura	ca-islamic-umalqura	Islamic - Umm Al-Qura calendar of Saudi Arabia

字段概要

字段
限定符和类型字段说明

static HijrahChronology INSTANCE
Singleton instance of the Islamic Umm Al-Qura calendar of Saudi Arabia.

字段
限定符和类型	字段	说明
`static HijrahChronology`	`INSTANCE`	Singleton instance of the Islamic Umm Al-Qura calendar of Saudi Arabia.

方法概要

所有方法实例方法具体方法
限定符和类型	方法	说明
`HijrahDate`	`date(int prolepticYear, int month, int dayOfMonth)`	Obtains a local date in Hijrah calendar system from the proleptic-year, month-of-year and day-of-month fields.
`HijrahDate`	`date(Era era, int yearOfEra, int month, int dayOfMonth)`	Obtains a local date in Hijrah calendar system from the era, year-of-era, month-of-year and day-of-month fields.
`HijrahDate`	`date(TemporalAccessor temporal)`	Obtains a local date in this chronology from another temporal object.
`HijrahDate`	`dateEpochDay(long epochDay)`	Obtains a local date in the Hijrah calendar system from the epoch-day.
`HijrahDate`	`dateNow()`	Obtains the current local date in this chronology from the system clock in the default time-zone.
`HijrahDate`	`dateNow(Clock clock)`	Obtains the current local date in this chronology from the specified clock.
`HijrahDate`	`dateNow(ZoneId zone)`	Obtains the current local date in this chronology from the system clock in the specified time-zone.
`HijrahDate`	`dateYearDay(int prolepticYear, int dayOfYear)`	Obtains a local date in Hijrah calendar system from the proleptic-year and day-of-year fields.
`HijrahDate`	`dateYearDay(Era era, int yearOfEra, int dayOfYear)`	Obtains a local date in Hijrah calendar system from the era, year-of-era and day-of-year fields.
`HijrahEra`	`eraOf(int eraValue)`	Creates the chronology era object from the numeric value.
`List<Era>`	`eras()`	Gets the list of eras for the chronology.
`String`	`getCalendarType()`	Gets the calendar type of the Islamic calendar.
`String`	`getId()`	Gets the ID of the chronology.
`boolean`	`isLeapYear(long prolepticYear)`	Checks if the specified year is a leap year.
`ChronoLocalDateTime<HijrahDate>`	`localDateTime(TemporalAccessor temporal)`	Obtains a local date-time in this chronology from another temporal object.
`int`	`prolepticYear(Era era, int yearOfEra)`	Calculates the proleptic-year given the era and year-of-era.
`ValueRange`	`range(ChronoField field)`	Gets the range of valid values for the specified field.
`HijrahDate`	`resolveDate(Map<TemporalField,Long> fieldValues, ResolverStyle resolverStyle)`	Resolves parsed `ChronoField` values into a date during parsing.
`ChronoZonedDateTime<HijrahDate>`	`zonedDateTime(Instant instant, ZoneId zone)`	Obtains a `ChronoZonedDateTime` in this chronology from an `Instant`.
`ChronoZonedDateTime<HijrahDate>`	`zonedDateTime(TemporalAccessor temporal)`	Obtains a `ChronoZonedDateTime` in this chronology from another temporal object.

从类继承的方法 java.time.chrono.AbstractChronology
compareTo, equals, hashCode, toString

从接口继承的方法 java.time.chrono.Chronology
from, getAvailableChronologies, getDisplayName, of, ofLocale, period

从类继承的方法 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- 字段详细资料
  - INSTANCE
```
public static final HijrahChronology INSTANCE
```
    Singleton instance of the Islamic Umm Al-Qura calendar of Saudi Arabia. Other Hijrah chronology variants may be available from Chronology#getAvailableChronologies.
- 方法详细资料
  - getId
```
public String getId()
```
    Gets the ID of the chronology.
    The ID uniquely identifies the Chronology. It can be used to lookup the Chronology using Chronology#of(String).
    
    指定者:
    
    getId 在接口中 Chronology
    
    返回:
    
    the chronology ID, non-null
    
    另请参阅:
    
    getCalendarType()
  - getCalendarType
```
public String getCalendarType()
```
    Gets the calendar type of the Islamic calendar.
    The calendar type is an identifier defined by the Unicode Locale Data Markup Language (LDML) specification. It can be used to lookup the Chronology using Chronology#of(String).
    
    指定者:
    
    getCalendarType 在接口中 Chronology
    
    返回:
    
    the calendar system type; non-null if the calendar has a standard type, otherwise null
    
    另请参阅:
    
    getId()
  - date
```
public HijrahDate date(Era era,
                       int yearOfEra,
                       int month,
                       int dayOfMonth)
```
    Obtains a local date in Hijrah calendar system from the era, year-of-era, month-of-year and day-of-month fields.
    
    指定者:
    
    date 在接口中 Chronology
    
    参数:
    
    era - the Hijrah era, not null
    
    yearOfEra - the year-of-era
    
    month - the month-of-year
    
    dayOfMonth - the day-of-month
    
    返回:
    
    the Hijrah local date, not null
    
    抛出:
    
    DateTimeException - if unable to create the date
    
    ClassCastException - if the era is not a HijrahEra
  - date
```
public HijrahDate date(int prolepticYear,
                       int month,
                       int dayOfMonth)
```
    Obtains a local date in Hijrah calendar system from the proleptic-year, month-of-year and day-of-month fields.
    
    指定者:
    
    date 在接口中 Chronology
    
    参数:
    
    prolepticYear - the proleptic-year
    
    month - the month-of-year
    
    dayOfMonth - the day-of-month
    
    返回:
    
    the Hijrah local date, not null
    
    抛出:
    
    DateTimeException - if unable to create the date
  - dateYearDay
```
public HijrahDate dateYearDay(Era era,
                              int yearOfEra,
                              int dayOfYear)
```
    Obtains a local date in Hijrah calendar system from the era, year-of-era and day-of-year fields.
    
    指定者:
    
    dateYearDay 在接口中 Chronology
    
    参数:
    
    era - the Hijrah era, not null
    
    yearOfEra - the year-of-era
    
    dayOfYear - the day-of-year
    
    返回:
    
    the Hijrah local date, not null
    
    抛出:
    
    DateTimeException - if unable to create the date
    
    ClassCastException - if the era is not a HijrahEra
  - dateYearDay
```
public HijrahDate dateYearDay(int prolepticYear,
                              int dayOfYear)
```
    Obtains a local date in Hijrah calendar system from the proleptic-year and day-of-year fields.
    
    指定者:
    
    dateYearDay 在接口中 Chronology
    
    参数:
    
    prolepticYear - the proleptic-year
    
    dayOfYear - the day-of-year
    
    返回:
    
    the Hijrah local date, not null
    
    抛出:
    
    DateTimeException - if the value of the year is out of range, or if the day-of-year is invalid for the year
  - dateEpochDay
```
public HijrahDate dateEpochDay(long epochDay)
```
    Obtains a local date in the Hijrah calendar system from the epoch-day.
    
    指定者:
    
    dateEpochDay 在接口中 Chronology
    
    参数:
    
    epochDay - the epoch day
    
    返回:
    
    the Hijrah local date, not null
    
    抛出:
    
    DateTimeException - if unable to create the date
  - dateNow
```
public HijrahDate dateNow()
```
    从接口复制的说明: Chronology
    
    Obtains the current local date in this chronology from the system clock in the default time-zone.
    This will query the Clock#systemDefaultZone() in the default time-zone to obtain the current date.
    Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
    
    指定者:
    
    dateNow 在接口中 Chronology
    
    返回:
    
    the current local date using the system clock and default time-zone, not null
  - dateNow
```
public HijrahDate dateNow(ZoneId zone)
```
    从接口复制的说明: Chronology
    
    Obtains the current local date in this chronology from the system clock in the specified time-zone.
    This will query the Clock#system(ZoneId) to obtain the current date. Specifying the time-zone avoids dependence on the default time-zone.
    Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.
    
    指定者:
    
    dateNow 在接口中 Chronology
    
    参数:
    
    zone - the zone ID to use, not null
    
    返回:
    
    the current local date using the system clock, not null
  - dateNow
```
public HijrahDate dateNow(Clock clock)
```
    从接口复制的说明: Chronology
    
    Obtains the current local date in this chronology from the specified clock.
    This will query the specified clock to obtain the current date - today. Using this method allows the use of an alternate clock for testing. The alternate clock may be introduced using Clock.
    
    指定者:
    
    dateNow 在接口中 Chronology
    
    参数:
    
    clock - the clock to use, not null
    
    返回:
    
    the current local date, not null
  - date
```
public HijrahDate date(TemporalAccessor temporal)
```
    从接口复制的说明: Chronology
    
    Obtains a local date in this chronology from another temporal object.
    This obtains a date in this chronology based on the specified temporal. A TemporalAccessor represents an arbitrary set of date and time information, which this factory converts to an instance of ChronoLocalDate.
    The conversion typically uses the ChronoField#EPOCH_DAY field, which is standardized across calendar systems.
    This method matches the signature of the functional interface TemporalQuery allowing it to be used as a query via method reference, aChronology::date.
    
    指定者:
    
    date 在接口中 Chronology
    
    参数:
    
    temporal - the temporal object to convert, not null
    
    返回:
    
    the local date in this chronology, not null
    
    另请参阅:
    
    ChronoLocalDate.from(TemporalAccessor)
  - localDateTime
```
public ChronoLocalDateTime<HijrahDate> localDateTime(TemporalAccessor temporal)
```
    从接口复制的说明: Chronology
    
    Obtains a local date-time in this chronology from another temporal object.
    This obtains a date-time in this chronology based on the specified temporal. A TemporalAccessor represents an arbitrary set of date and time information, which this factory converts to an instance of ChronoLocalDateTime.
    The conversion extracts and combines the ChronoLocalDate and the LocalTime from the temporal object. Implementations are permitted to perform optimizations such as accessing those fields that are equivalent to the relevant objects. The result uses this chronology.
    This method matches the signature of the functional interface TemporalQuery allowing it to be used as a query via method reference, aChronology::localDateTime.
    
    指定者:
    
    localDateTime 在接口中 Chronology
    
    参数:
    
    temporal - the temporal object to convert, not null
    
    返回:
    
    the local date-time in this chronology, not null
    
    另请参阅:
    
    ChronoLocalDateTime.from(TemporalAccessor)
  - zonedDateTime
```
public ChronoZonedDateTime<HijrahDate> zonedDateTime(TemporalAccessor temporal)
```
    从接口复制的说明: Chronology
    
    Obtains a ChronoZonedDateTime in this chronology from another temporal object.
    This obtains a zoned date-time in this chronology based on the specified temporal. A TemporalAccessor represents an arbitrary set of date and time information, which this factory converts to an instance of ChronoZonedDateTime.
    The conversion will first obtain a ZoneId from the temporal object, falling back to a ZoneOffset if necessary. It will then try to obtain an Instant, falling back to a ChronoLocalDateTime if necessary. The result will be either the combination of ZoneId or ZoneOffset with Instant or ChronoLocalDateTime. Implementations are permitted to perform optimizations such as accessing those fields that are equivalent to the relevant objects. The result uses this chronology.
    This method matches the signature of the functional interface TemporalQuery allowing it to be used as a query via method reference, aChronology::zonedDateTime.
    
    指定者:
    
    zonedDateTime 在接口中 Chronology
    
    参数:
    
    temporal - the temporal object to convert, not null
    
    返回:
    
    the zoned date-time in this chronology, not null
    
    另请参阅:
    
    ChronoZonedDateTime.from(TemporalAccessor)
  - zonedDateTime
```
public ChronoZonedDateTime<HijrahDate> zonedDateTime(Instant instant,
                                                     ZoneId zone)
```
    从接口复制的说明: Chronology
    
    Obtains a ChronoZonedDateTime in this chronology from an Instant.
    This obtains a zoned date-time with the same instant as that specified.
    
    指定者:
    
    zonedDateTime 在接口中 Chronology
    
    参数:
    
    instant - the instant to create the date-time from, not null
    
    zone - the time-zone, not null
    
    返回:
    
    the zoned date-time, not null
  - isLeapYear
```
public boolean isLeapYear(long prolepticYear)
```
    从接口复制的说明: Chronology
    Checks if the specified year is a leap year.
    A leap-year is a year of a longer length than normal. The exact meaning is determined by the chronology according to the following constraints.
    - a leap-year must imply a year-length longer than a non leap-year.
    - a chronology that does not support the concept of a year must return false.
    指定者:
    
    isLeapYear 在接口中 Chronology
    
    参数:
    
    prolepticYear - the proleptic-year to check, not validated for range
    
    返回:
    
    true if the year is a leap year
  - prolepticYear
```
public int prolepticYear(Era era,
                         int yearOfEra)
```
    从接口复制的说明: Chronology
    
    Calculates the proleptic-year given the era and year-of-era.
    This combines the era and year-of-era into the single proleptic-year field.
    If the chronology makes active use of eras, such as JapaneseChronology then the year-of-era will be validated against the era. For other chronologies, validation is optional.
    
    指定者:
    
    prolepticYear 在接口中 Chronology
    
    参数:
    
    era - the era of the correct type for the chronology, not null
    
    yearOfEra - the chronology year-of-era
    
    返回:
    
    the proleptic-year
  - eraOf
```
public HijrahEra eraOf(int eraValue)
```
    从接口复制的说明: Chronology
    
    Creates the chronology era object from the numeric value.
    The era is, conceptually, the largest division of the time-line. Most calendar systems have a single epoch dividing the time-line into two eras. However, some have multiple eras, such as one for the reign of each leader. The exact meaning is determined by the chronology according to the following constraints.
    The era in use at 1970-01-01 must have the value 1. Later eras must have sequentially higher values. Earlier eras must have sequentially lower values. Each chronology must refer to an enum or similar singleton to provide the era values.
    This method returns the singleton era of the correct type for the specified era value.
    
    指定者:
    
    eraOf 在接口中 Chronology
    
    参数:
    
    eraValue - the era value
    
    返回:
    
    the calendar system era, not null
  - eras
```
public List<Era> eras()
```
    从接口复制的说明: Chronology
    
    Gets the list of eras for the chronology.
    Most calendar systems have an era, within which the year has meaning. If the calendar system does not support the concept of eras, an empty list must be returned.
    
    指定者:
    
    eras 在接口中 Chronology
    
    返回:
    
    the list of eras for the chronology, may be immutable, not null
  - range
```
public ValueRange range(ChronoField field)
```
    从接口复制的说明: Chronology
    
    Gets the range of valid values for the specified field.
    All fields can be expressed as a long integer. This method returns an object that describes the valid range for that value.
    Note that the result only describes the minimum and maximum valid values and it is important not to read too much into them. For example, there could be values within the range that are invalid for the field.
    This method will return a result whether or not the chronology supports the field.
    
    指定者:
    
    range 在接口中 Chronology
    
    参数:
    
    field - the field to get the range for, not null
    
    返回:
    
    the range of valid values for the field, not null
  - resolveDate
```
public HijrahDate resolveDate(Map<TemporalField,Long> fieldValues,
                              ResolverStyle resolverStyle)
```
    从类复制的说明: AbstractChronology
    Resolves parsed ChronoField values into a date during parsing.
    Most TemporalField implementations are resolved using the resolve method on the field. By contrast, the ChronoField class defines fields that only have meaning relative to the chronology. As such, ChronoField date fields are resolved here in the context of a specific chronology.
    ChronoField instances are resolved by this method, which may be overridden in subclasses.
    - EPOCH_DAY - If present, this is converted to a date and all other date fields are then cross-checked against the date.
    - PROLEPTIC_MONTH - If present, then it is split into the YEAR and MONTH_OF_YEAR. If the mode is strict or smart then the field is validated.
    - YEAR_OF_ERA and ERA - If both are present, then they are combined to form a YEAR. In lenient mode, the YEAR_OF_ERA range is not validated, in smart and strict mode it is. The ERA is validated for range in all three modes. If only the YEAR_OF_ERA is present, and the mode is smart or lenient, then the last available era is assumed. In strict mode, no era is assumed and the YEAR_OF_ERA is left untouched. If only the ERA is present, then it is left untouched.
    - YEAR, MONTH_OF_YEAR and DAY_OF_MONTH - If all three are present, then they are combined to form a date. In all three modes, the YEAR is validated. If the mode is smart or strict, then the month and day are validated. If the mode is lenient, then the date is combined in a manner equivalent to creating a date on the first day of the first month in the requested year, then adding the difference in months, then the difference in days. If the mode is smart, and the day-of-month is greater than the maximum for the year-month, then the day-of-month is adjusted to the last day-of-month. If the mode is strict, then the three fields must form a valid date.
    - YEAR and DAY_OF_YEAR - If both are present, then they are combined to form a date. In all three modes, the YEAR is validated. If the mode is lenient, then the date is combined in a manner equivalent to creating a date on the first day of the requested year, then adding the difference in days. If the mode is smart or strict, then the two fields must form a valid date.
    - YEAR, MONTH_OF_YEAR, ALIGNED_WEEK_OF_MONTH and ALIGNED_DAY_OF_WEEK_IN_MONTH - If all four are present, then they are combined to form a date. In all three modes, the YEAR is validated. If the mode is lenient, then the date is combined in a manner equivalent to creating a date on the first day of the first month in the requested year, then adding the difference in months, then the difference in weeks, then in days. If the mode is smart or strict, then the all four fields are validated to their outer ranges. The date is then combined in a manner equivalent to creating a date on the first day of the requested year and month, then adding the amount in weeks and days to reach their values. If the mode is strict, the date is additionally validated to check that the day and week adjustment did not change the month.
    - YEAR, MONTH_OF_YEAR, ALIGNED_WEEK_OF_MONTH and DAY_OF_WEEK - If all four are present, then they are combined to form a date. The approach is the same as described above for years, months and weeks in ALIGNED_DAY_OF_WEEK_IN_MONTH. The day-of-week is adjusted as the next or same matching day-of-week once the years, months and weeks have been handled.
    - YEAR, ALIGNED_WEEK_OF_YEAR and ALIGNED_DAY_OF_WEEK_IN_YEAR - If all three are present, then they are combined to form a date. In all three modes, the YEAR is validated. If the mode is lenient, then the date is combined in a manner equivalent to creating a date on the first day of the requested year, then adding the difference in weeks, then in days. If the mode is smart or strict, then the all three fields are validated to their outer ranges. The date is then combined in a manner equivalent to creating a date on the first day of the requested year, then adding the amount in weeks and days to reach their values. If the mode is strict, the date is additionally validated to check that the day and week adjustment did not change the year.
    - YEAR, ALIGNED_WEEK_OF_YEAR and DAY_OF_WEEK - If all three are present, then they are combined to form a date. The approach is the same as described above for years and weeks in ALIGNED_DAY_OF_WEEK_IN_YEAR. The day-of-week is adjusted as the next or same matching day-of-week once the years and weeks have been handled.
    The default implementation is suitable for most calendar systems. If ChronoField.YEAR_OF_ERA is found without an ChronoField.ERA then the last era in Chronology.eras() is used. The implementation assumes a 7 day week, that the first day-of-month has the value 1, that first day-of-year has the value 1, and that the first of the month and year always exists.
    指定者:
    
    resolveDate 在接口中 Chronology
    
    覆盖:
    
    resolveDate 在类中 AbstractChronology
    
    参数:
    
    fieldValues - the map of fields to values, which can be updated, not null
    
    resolverStyle - the requested type of resolve, not null
    
    返回:
    
    the resolved date, null if insufficient information to create a date

类 HijrahChronology

字段概要

方法概要

从类继承的方法 java.time.chrono.AbstractChronology

从接口继承的方法 java.time.chrono.Chronology

从类继承的方法 java.lang.Object

字段详细资料

INSTANCE

方法详细资料

getId

getCalendarType

date

date

dateYearDay

dateYearDay

dateEpochDay

dateNow

dateNow

dateNow

date

localDateTime

zonedDateTime

zonedDateTime

isLeapYear

prolepticYear

eraOf

eras

range

resolveDate