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JapaneseEra

public final class JapaneseEra
extends Object implements Era, Serializable

java.lang.Object
↳	java.time.chrono.JapaneseEra

An era in the Japanese Imperial calendar system.

The Japanese government defines the official name and start date of each era. Eras are consecutive and their date ranges do not overlap, so the end date of one era is always the day before the start date of the next era.

The Java SE Platform supports all eras defined by the Japanese government, beginning with the Meiji era. Each era is identified in the Platform by an integer value and a name. The of(int) and valueOf(java.lang.String) methods may be used to obtain a singleton instance of JapaneseEra for each era. The values() method returns the singleton instances of all supported eras.

For convenience, this class declares a number of public static final fields that refer to singleton instances returned by the values() method.

Summary

Fields
`public static final JapaneseEra`	`HEISEI` The singleton instance for the 'Heisei' era (1989-01-08 - 2019-04-30) which has the value 2.
`public static final JapaneseEra`	`MEIJI` The singleton instance for the 'Meiji' era (1868-01-01 - 1912-07-29) which has the value -1.
`public static final JapaneseEra`	`REIWA` The singleton instance for the 'Reiwa' era (2019-05-01 - current) which has the value 3.
`public static final JapaneseEra`	`SHOWA` The singleton instance for the 'Showa' era (1926-12-25 - 1989-01-07) which has the value 1.
`public static final JapaneseEra`	`TAISHO` The singleton instance for the 'Taisho' era (1912-07-30 - 1926-12-24) which has the value 0.

Public methods
`String`	`getDisplayName(TextStyle style, Locale locale)` Gets the textual representation of this era.
`int`	`getValue()` Gets the numeric era `int` value.
`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.
`String`	`toString()` Returns a string representation of the object.
`static JapaneseEra`	`valueOf(String japaneseEra)` Returns the `JapaneseEra` with the name.
`static JapaneseEra[]`	`values()` Returns an array of JapaneseEras.

Inherited methods

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void`	`wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void`	`wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

From interface


        
          java.time.chrono.Era

`default Temporal`	`adjustInto(Temporal temporal)` Adjusts the specified temporal object to have the same era as this object.
`default int`	`get(TemporalField field)` Gets the value of the specified field from this era as an `int`.
`default String`	`getDisplayName(TextStyle style, Locale locale)` Gets the textual representation of this era.
`default long`	`getLong(TemporalField field)` Gets the value of the specified field from this era as a `long`.
`abstract int`	`getValue()` Gets the numeric value associated with the era as defined by the chronology.
`default boolean`	`isSupported(TemporalField field)` Checks if the specified field is supported.
`default <R> R`	`query(TemporalQuery<R> query)` Queries this era using the specified query.
`default ValueRange`	`range(TemporalField field)` Gets the range of valid values for the specified field.

From interface


        
          java.time.temporal.TemporalAccessor

`default int`	`get(TemporalField field)` Gets the value of the specified field as an `int`.
`abstract long`	`getLong(TemporalField field)` Gets the value of the specified field as a `long`.
`abstract boolean`	`isSupported(TemporalField field)` Checks if the specified field is supported.
`default <R> R`	`query(TemporalQuery<R> query)` Queries this date-time.
`default ValueRange`	`range(TemporalField field)` Gets the range of valid values for the specified field.

From interface


        
          java.time.temporal.TemporalAdjuster


        abstract
        
        
        
        
        Temporal


      adjustInto(Temporal temporal)

Adjusts the specified temporal object.

Fields

HEISEI

public static final JapaneseEra HEISEI

The singleton instance for the 'Heisei' era (1989-01-08 - 2019-04-30) which has the value 2.

MEIJI

public static final JapaneseEra MEIJI

The singleton instance for the 'Meiji' era (1868-01-01 - 1912-07-29) which has the value -1.

REIWA

public static final JapaneseEra REIWA

The singleton instance for the 'Reiwa' era (2019-05-01 - current) which has the value 3. The end date of this era is not specified, unless the Japanese Government defines it.

SHOWA

public static final JapaneseEra SHOWA

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

Public methods

getDisplayName

public String getDisplayName (TextStyle style, 
                Locale locale)

Gets the textual representation of this era.

This returns the textual name used to identify the era, suitable for presentation to the user. The parameters control the style of the returned text and the locale.

If no textual mapping is found then the numeric value is returned.

This default implementation is suitable for all implementations.

Parameters
`style`	`TextStyle`:
`locale`	`Locale`:

Returns
`String`	the text value of the era, not null

getValue

public int getValue ()

Gets the numeric era int value.

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)).

Returns
`int`	the era value

of

public static JapaneseEra of (int japaneseEra)

Obtains an instance of JapaneseEra from an int value.

The value 1 is associated with the 'Showa' era, because it contains 1970-01-01 (ISO calendar system).
The values -1 and 0 are associated with two earlier eras, Meiji and Taisho, respectively.
A value greater than 1 is associated with a later era, beginning with Heisei (2).

Every instance of JapaneseEra that is returned from the values() method has an int value (available via Era#getValue() which is accepted by this method.

Parameters
`japaneseEra`	`int`: the era to represent

Returns
`JapaneseEra`	the `JapaneseEra` singleton, not null

Throws
`DateTimeException`	if the value is invalid

range

public ValueRange range (TemporalField field)

Gets the range of valid values for the specified field.

The range object expresses the minimum and maximum valid values for a field. This era is used to enhance the accuracy of the returned range. If it is not possible to return the range, because the field is not supported or for some other reason, an exception is thrown.

If the field is a ChronoField then the query is implemented here. The ERA field returns the range. All other ChronoField instances will throw an UnsupportedTemporalTypeException.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.rangeRefinedBy(TemporalAccessor) passing this as the argument. Whether the range can be obtained is determined by the field.

The range of valid Japanese eras can change over time due to the nature of the Japanese calendar system.

Parameters
`field`	`TemporalField`: the field to query the range for, not null

Returns
`ValueRange`	the range of valid values for the field, not null

Throws
`DateTimeException`	if the range for the field cannot be obtained
`UnsupportedTemporalTypeException`	if the unit is not supported

toString

public String toString ()

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())

Returns
`String`	a string representation of the object.

valueOf

public static JapaneseEra valueOf (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`	`String`: the japaneseEra name; non-null

Returns
`JapaneseEra`	the `JapaneseEra` singleton, never null

Throws
`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
`JapaneseEra[]`	an array of JapaneseEras

Interfaces

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JapaneseEra

Summary

Fields

Public methods

Inherited methods

Fields

HEISEI

MEIJI

REIWA

SHOWA

TAISHO

Public methods

getDisplayName

getValue

of

range

toString

valueOf

values