JapaneseEra
Class JapaneseEra
- java.lang.Object
-
- java.time.chrono.JapaneseEra
- All Implemented Interfaces:
- Serializable, Era, TemporalAccessor, TemporalAdjuster
public final class JapaneseEra extends Object implements Era, 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.
- Implementation Requirements:
- This class is immutable and thread-safe.
- Since:
- 1.8
Fields
MEIJI
public static final JapaneseEra MEIJI
The singleton instance for the 'Meiji' era (1868-01-01 - 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.
Methods
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(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:
-
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()
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
)).
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.
- Specified by:
-
range
in interfaceEra
- Specified by:
-
range
in interfaceTemporalAccessor
- Parameters:
-
field
- the field to query the range for, not null - Returns:
- 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()
Description copied from class: Object
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())
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