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Java Standard Edition (SE)

JapaneseEra


compact1, compact2, compact3
java.time.chrono

Class 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
    See Also:
    Serialized Form
    • Field Detail

      • 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.
    • 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(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)).

        Specified by:
        getValue in interface Era
        Returns:
        the era value
      • 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 interface Era
        Specified by:
        range in interface TemporalAccessor
        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())
         
        Overrides:
        toString in class Object
        Returns:
        a string representation of the object.


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