程序包 java.time.chrono

枚举 IsoEra

java.lang.Object

java.lang.Enum<IsoEra>

java.time.chrono.IsoEra

所有已实现的接口:

Serializable, Comparable<IsoEra>, 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.

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.

从以下版本开始:

1.8

枚举常量概要

枚举常量

枚举常量	说明
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.

方法概要

限定符和类型	方法	说明
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)	返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)
static IsoEra[]	values()	按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示: for (IsoEra c : IsoEra.values()) System.out.println(c);

从类继承的方法 java.lang.Enum

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

从接口继承的方法 java.time.chrono.Era

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

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

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.

方法详细资料

values

public static IsoEra[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

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

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static IsoEra valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

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.

参数:

isoEra - the BCE/CE value to represent, from 0 (BCE) to 1 (CE)

返回:

the era singleton, not null

抛出:

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.

指定者:

getValue 在接口中 Era

返回:

the era value, from 0 (BCE) to 1 (CE)