Module org.threeten.extra

Package org.threeten.extra.chrono

Enum JulianEra

java.lang.Object

java.lang.Enum<JulianEra>

org.threeten.extra.chrono.JulianEra

All Implemented Interfaces:

Serializable, Comparable<JulianEra>, Era, TemporalAccessor, TemporalAdjuster

public enum JulianEra
extends Enum<JulianEra>
implements Era

An era in the Julian calendar system.

The Julian calendar system has two eras. The current era, for years from 1 onwards, is known as 'Anno Domini'. All previous years, zero or earlier in the proleptic count or one and greater in the year-of-era count, are part of the 'Before Christ' era.

The start of the Julian epoch 0001-01-01 (Julian) is 0000-12-30 (ISO).

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

Implementation Requirements:

This is an immutable and thread-safe enum.

Enum Constant Summary

Enum Constants

Enum Constant	Description
AD	The singleton instance for the current era, 'Anno Domini', which has the numeric value 1.
BC	The singleton instance for the era before the current one, 'Before Christ', which has the numeric value 0.

Method Summary

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

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.time.chrono.Era

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

Enum Constant Detail

BC

public static final JulianEra BC

The singleton instance for the era before the current one, 'Before Christ', which has the numeric value 0.

AD

public static final JulianEra AD

The singleton instance for the current era, 'Anno Domini', which has the numeric value 1.

Method Detail

values

public static JulianEra[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (JulianEra c : JulianEra.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static JulianEra valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified name

NullPointerException - if the argument is null

of

public static JulianEra of(int era)

Obtains an instance of JulianEra from an int value.

JulianEra is an enum representing the Julian eras of BC/AD. This factory allows the enum to be obtained from the int value.

Parameters:

era - the BC/AD value to represent, from 0 (BC) to 1 (AD)

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 BC has the value 0, while the era AD has the value 1.

Specified by:

getValue in interface Era

Returns:

the era value, from 0 (BC) to 1 (AD)