java.time.chrono

Class JapaneseEra

java.lang.Object

java.time.jdk8.DefaultInterfaceTemporalAccessor

java.time.jdk8.DefaultInterfaceEra

java.time.chrono.JapaneseEra

All Implemented Interfaces:

java.io.Serializable, Era, TemporalAccessor, TemporalAdjuster

public final class JapaneseEra
extends DefaultInterfaceEra
implements java.io.Serializable

An era in the Japanese Imperial calendar system.

This class defines the valid eras for the Japanese chronology. Japan introduced the Gregorian calendar starting with Meiji 6. Only Meiji and later eras are supported; dates before Meiji 6, January 1 are not supported.

Specification for implementors

This class is immutable and thread-safe.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static JapaneseEra	HEISEI The singleton instance for the 'Heisei' era (1989-01-08 - current) which has the value 2.
static JapaneseEra	MEIJI The singleton instance for the 'Meiji' era (1868-09-08 - 1912-07-29) which has the value -1.
static JapaneseEra	SHOWA The singleton instance for the 'Showa' era (1926-12-25 - 1989-01-07) which has the value 1.
static JapaneseEra	TAISHO The singleton instance for the 'Taisho' era (1912-07-30 - 1926-12-24) which has the value 0.

Method Summary

Methods

Modifier and Type	Method and Description
int	getValue() Returns the numeric value of this JapaneseEra.
static JapaneseEra	of(int japaneseEra) Obtains an instance of JapaneseEra from an int value.
ValueRange	range(TemporalField field) Gets the range of valid values for the specified field.
java.lang.String	toString()
static JapaneseEra	valueOf(java.lang.String japaneseEra) Returns the JapaneseEra with the name.
static JapaneseEra[]	values() Returns an array of JapaneseEras.

Methods inherited from class java.time.jdk8.DefaultInterfaceEra

adjustInto, get, getDisplayName, getLong, isSupported, query

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

MEIJI

public static final JapaneseEra MEIJI

The singleton instance for the 'Meiji' era (1868-09-08 - 1912-07-29) which has the value -1.

TAISHO

public static final JapaneseEra TAISHO

The singleton instance for the 'Taisho' era (1912-07-30 - 1926-12-24) which has the value 0.

SHOWA

public static final JapaneseEra SHOWA

The singleton instance for the 'Showa' era (1926-12-25 - 1989-01-07) which has the value 1.

HEISEI

public static final JapaneseEra HEISEI

The singleton instance for the 'Heisei' era (1989-01-08 - current) which has the value 2.

Method Detail

of

public static JapaneseEra of(int japaneseEra)

Obtains an instance of JapaneseEra from an int value.

The SHOWA era that contains 1970-01-01 (ISO calendar system) has the value 1 Later era is numbered 2 (HEISEI). Earlier eras are numbered 0 (TAISHO), -1 (MEIJI), only Meiji and later eras are supported.

Parameters:

japaneseEra - the era to represent

Returns:

the JapaneseEra singleton, not null

Throws:

DateTimeException - if the value is invalid

valueOf

public static JapaneseEra valueOf(java.lang.String japaneseEra)

Returns the JapaneseEra with the name.

The string must match exactly the name of the era. (Extraneous whitespace characters are not permitted.)

Parameters:

japaneseEra - the japaneseEra name; non-null

Returns:

the JapaneseEra singleton, never null

Throws:

java.lang.IllegalArgumentException - if there is not JapaneseEra with the specified name

values

public static JapaneseEra[] values()

Returns an array of JapaneseEras.

This method may be used to iterate over the JapaneseEras as follows:

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

Returns:

an array of JapaneseEras

getValue

public int getValue()

Returns the numeric value of this JapaneseEra.

The SHOWA era that contains 1970-01-01 (ISO calendar system) has the value 1. Later eras are numbered from 2 (HEISEI). Earlier eras are numbered 0 (TAISHO), -1 (MEIJI), and -999 (#SEIREKI).

Specified by:

getValue in interface Era

Returns:

the era value

range

public ValueRange range(TemporalField field)

Description copied from interface: TemporalAccessor

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. The value of this temporal object is used to enhance the accuracy of the returned range. If the date-time cannot return the range, because the field is unsupported or for some other reason, an exception will be thrown.

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.

Specification for implementors

Implementations must check and handle all fields defined in ChronoField. If the field is supported, then the range of the field must be returned. If unsupported, then a DateTimeException must be thrown.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.rangeRefinedBy(TemporalAccessorl) passing this as the argument.

Implementations must not alter either this object.

Specified by:

range in interface TemporalAccessor

Overrides:

range in class DefaultInterfaceTemporalAccessor

Parameters:

field - the field to query the range for, not null

Returns:

the range of valid values for the field, not null

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object