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/OpenJDK 21

Enum Class IsoEra

java.lang.Object
java.lang.Enum<IsoEra>
java.time.chrono.IsoEra
All Implemented Interfaces:
Serializable, Comparable<IsoEra>, Constable, Era, TemporalAccessor, TemporalAdjuster 
public enum IsoEra extends Enum<IsoEra> implements Era
An era in the ISO calendar system.

The ISO-8601 standard does not define eras. A definition has therefore been created with two eras - 'Current era' (CE) for years on or after 0001-01-01 (ISO), and 'Before current era' (BCE) for years before that.

ISO years and eras
year-of-era era proleptic-year
2 CE 2
1 CE 1
1 BCE 0
2 BCE -1

Do not use ordinal() to obtain the numeric representation of IsoEra. Use getValue() instead.

Implementation Requirements:
This is an immutable and thread-safe enum.
Since:
1.8

Nested Class Summary

Nested classes/interfaces declared in class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constant Description
BCE
The singleton instance for the era before the current one, 'Before Current Era', which has the numeric value 0.
CE
The singleton instance for the current era, 'Current Era', which has the numeric value 1.

Method Summary

Modifier and Type Method Description
int getValue()
Gets the numeric era int value.
static IsoEra of(int isoEra)
Obtains an instance of IsoEra from an int value.
static IsoEra valueOf(String name)
Returns the enum constant of this class with the specified name.
static IsoEra[] values()
Returns an array containing the constants of this enum class, in the order they are declared.

Methods declared in class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods declared in class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods declared in interface java.time.chrono.Era

adjustInto, get, getDisplayName, getLong, isSupported, query, range

Enum Constant Details

BCE

public static final IsoEra BCE
The singleton instance for the era before the current one, 'Before Current Era', which has the numeric value 0.

CE

public static final IsoEra CE
The singleton instance for the current era, 'Current Era', which has the numeric value 1.

Method Details

values

public static IsoEra[] values()
Returns an array containing the constants of this enum class, in the order they are declared.
Returns:
an array containing the constants of this enum class, in the order they are declared

valueOf

public static IsoEra valueOf(String name)
Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
Parameters:
name - the name of the enum constant to be returned.
Returns:
the enum constant with the specified name
Throws:
IllegalArgumentException - if this enum class has no constant with the specified name
NullPointerException - if the argument is null

of

public static IsoEra of(int isoEra)
Obtains an instance of IsoEra from an int value.

IsoEra is an enum representing the ISO eras of BCE/CE. This factory allows the enum to be obtained from the int value.

Parameters:
isoEra - the BCE/CE value to represent, from 0 (BCE) to 1 (CE)
Returns:
the era singleton, not null
Throws:
DateTimeException - if the value is invalid

getValue

public int getValue()
Gets the numeric era int value.

The era BCE has the value 0, while the era CE has the value 1.

Specified by:
getValue in interface Era
Returns:
the era value, from 0 (BCE) to 1 (CE)

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/time/chrono/IsoEra.html