org.threeten.bp.chrono.Chronology
org.threeten.bp.chrono.IsoChronology
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java.lang.Object
public final class IsoChronology
The ISO calendar system.
This chronology defines the rules of the ISO calendar system. This calendar system is based on the ISO-8601 standard, which is the de facto world calendar.
The fields are defined as follows:
| Field Summary | |
|---|---|
static IsoChronology |
INSTANCE
Singleton instance of the ISO chronology. |
| Fields inherited from class org.threeten.bp.chrono.Chronology |
|---|
FROM |
| Method Summary | |
|---|---|
LocalDate |
date(Era era,
int yearOfEra,
int month,
int dayOfMonth)
Obtains an ISO local date from the era, year-of-era, month-of-year and day-of-month fields. |
LocalDate |
date(int prolepticYear,
int month,
int dayOfMonth)
Obtains an ISO local date from the proleptic-year, month-of-year and day-of-month fields. |
LocalDate |
date(TemporalAccessor temporal)
Obtains an ISO local date from another date-time object. |
LocalDate |
dateEpochDay(long epochDay)
Obtains a local date in this chronology from the epoch-day. |
LocalDate |
dateNow()
Obtains the current ISO local date from the system clock in the default time-zone. |
LocalDate |
dateNow(Clock clock)
Obtains the current ISO local date from the specified clock. |
LocalDate |
dateNow(ZoneId zone)
Obtains the current ISO local date from the system clock in the specified time-zone. |
LocalDate |
dateYearDay(Era era,
int yearOfEra,
int dayOfYear)
Obtains an ISO local date from the era, year-of-era and day-of-year fields. |
LocalDate |
dateYearDay(int prolepticYear,
int dayOfYear)
Obtains an ISO local date from the proleptic-year and day-of-year fields. |
IsoEra |
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 underlying calendar system - 'iso8601'. |
String |
getId()
Gets the ID of the chronology - 'ISO'. |
boolean |
isLeapYear(long prolepticYear)
Checks if the year is a leap year, according to the ISO proleptic calendar system rules. |
LocalDateTime |
localDateTime(TemporalAccessor temporal)
Obtains an ISO local date-time from another date-time 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. |
LocalDate |
resolveDate(Map<TemporalField,Long> fieldValues,
ResolverStyle resolverStyle)
Resolves parsed ChronoField values into a date during parsing. |
ZonedDateTime |
zonedDateTime(Instant instant,
ZoneId zone)
Obtains an ISO zoned date-time from an instant. |
ZonedDateTime |
zonedDateTime(TemporalAccessor temporal)
Obtains an ISO zoned date-time from another date-time object. |
| Methods inherited from class org.threeten.bp.chrono.Chronology |
|---|
compareTo, equals, from, getAvailableChronologies, getDisplayName, hashCode, of, ofLocale, period, toString |
| Methods inherited from class java.lang.Object |
|---|
clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
| Field Detail |
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public static final IsoChronology INSTANCE
| Method Detail |
|---|
public String getId()
The ID uniquely identifies the Chronology.
It can be used to lookup the Chronology using Chronology.of(String).
getId in class ChronologygetCalendarType()public String getCalendarType()
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).
It can also be used as part of a locale, accessible via
Locale#getUnicodeLocaleType(String) with the key 'ca'.
getCalendarType in class ChronologygetId()
public LocalDate date(Era era,
int yearOfEra,
int month,
int dayOfMonth)
date in class Chronologyera - the ISO era, not nullyearOfEra - the ISO year-of-eramonth - the ISO month-of-yeardayOfMonth - the ISO day-of-month
DateTimeException - if unable to create the date
public LocalDate date(int prolepticYear,
int month,
int dayOfMonth)
This is equivalent to LocalDate.of(int, int, int).
date in class ChronologyprolepticYear - the ISO proleptic-yearmonth - the ISO month-of-yeardayOfMonth - the ISO day-of-month
DateTimeException - if unable to create the date
public LocalDate dateYearDay(Era era,
int yearOfEra,
int dayOfYear)
dateYearDay in class Chronologyera - the ISO era, not nullyearOfEra - the ISO year-of-eradayOfYear - the ISO day-of-year
DateTimeException - if unable to create the date
public LocalDate dateYearDay(int prolepticYear,
int dayOfYear)
This is equivalent to LocalDate.ofYearDay(int, int).
dateYearDay in class ChronologyprolepticYear - the ISO proleptic-yeardayOfYear - the ISO day-of-year
DateTimeException - if unable to create the datepublic LocalDate dateEpochDay(long epochDay)
Chronology
The definition of EPOCH_DAY is the same
for all calendar systems, thus it can be used for conversion.
dateEpochDay in class ChronologyepochDay - the epoch day
public LocalDate date(TemporalAccessor temporal)
This is equivalent to LocalDate.from(TemporalAccessor).
date in class Chronologytemporal - the date-time object to convert, not null
DateTimeException - if unable to create the datepublic LocalDateTime localDateTime(TemporalAccessor temporal)
This is equivalent to LocalDateTime.from(TemporalAccessor).
localDateTime in class Chronologytemporal - the date-time object to convert, not null
DateTimeException - if unable to create the date-timepublic ZonedDateTime zonedDateTime(TemporalAccessor temporal)
This is equivalent to ZonedDateTime.from(TemporalAccessor).
zonedDateTime in class Chronologytemporal - the date-time object to convert, not null
DateTimeException - if unable to create the date-time
public ZonedDateTime zonedDateTime(Instant instant,
ZoneId zone)
This is equivalent to ZonedDateTime.ofInstant(Instant, ZoneId).
zonedDateTime in class Chronologyinstant - the instant to convert, not nullzone - the zone to use, not null
DateTimeException - if unable to create the date-timepublic LocalDate dateNow()
This will query the system clock 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.
dateNow in class ChronologyDateTimeException - if unable to create the datepublic LocalDate dateNow(ZoneId zone)
This will query the system clock 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.
dateNow in class Chronologyzone - the zone ID to use, not null
DateTimeException - if unable to create the datepublic LocalDate dateNow(Clock 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 dependency injection.
dateNow in class Chronologyclock - the clock to use, not null
DateTimeException - if unable to create the datepublic boolean isLeapYear(long prolepticYear)
This method applies the current rules for leap years across the whole time-line. In general, a year is a leap year if it is divisible by four without remainder. However, years divisible by 100, are not leap years, with the exception of years divisible by 400 which are.
For example, 1904 is a leap year it is divisible by 4. 1900 was not a leap year as it is divisible by 100, however 2000 was a leap year as it is divisible by 400.
The calculation is proleptic - applying the same rules into the far future and far past. This is historically inaccurate, but is correct for the ISO-8601 standard.
isLeapYear in class ChronologyprolepticYear - the ISO proleptic year to check
public int prolepticYear(Era era,
int yearOfEra)
ChronologyThis combines the era and year-of-era into the single proleptic-year field.
prolepticYear in class Chronologyera - the era of the correct type for the chronology, not nullyearOfEra - the chronology year-of-era
public IsoEra eraOf(int eraValue)
ChronologyThe 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.
eraOf in class ChronologyeraValue - the era value
public List<Era> eras()
ChronologyMost 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.
eras in class Chronologypublic ValueRange range(ChronoField field)
Chronology
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.
range in class Chronologyfield - the field to get the range for, not null
public LocalDate resolveDate(Map<TemporalField,Long> fieldValues,
ResolverStyle resolverStyle)
ChronologyChronoField 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.
The default implementation, which explains typical resolve behaviour,
is provided in AbstractChronology.
resolveDate in class ChronologyfieldValues - the map of fields to values, which can be updated, not nullresolverStyle - the requested type of resolve, not null
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