Class EthiopicDate

  • All Implemented Interfaces:
    java.io.Serializable, java.lang.Comparable<java.time.chrono.ChronoLocalDate>, java.time.chrono.ChronoLocalDate, java.time.temporal.Temporal, java.time.temporal.TemporalAccessor, java.time.temporal.TemporalAdjuster

    public final class EthiopicDate
    extends java.lang.Object
    implements java.time.chrono.ChronoLocalDate, java.io.Serializable
    A date in the Ethiopic calendar system.

    This date operates using the Ethiopic calendar. This calendar system is primarily used in Ethiopia. Dates are aligned such that 0001-01-01 (Ethiopic) is 0008-08-27 (ISO).

    Implementation Requirements

    This class is immutable and thread-safe.

    This class must be treated as a value type. Do not synchronize, rely on the identity hash code or use the distinction between equals() and ==.

    See Also:
    Serialized Form
    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.time.chrono.ChronoLocalDateTime<EthiopicDate> atTime​(java.time.LocalTime localTime)  
      boolean equals​(java.lang.Object obj)
      Compares this date to another date, including the chronology.
      static EthiopicDate from​(java.time.temporal.TemporalAccessor temporal)
      Obtains a EthiopicDate from a temporal object.
      EthiopicChronology getChronology()
      Gets the chronology of this date, which is the Ethiopic calendar system.
      EthiopicEra getEra()
      Gets the era applicable at this date.
      long getLong​(java.time.temporal.TemporalField field)  
      int hashCode()
      A hash code for this date.
      int lengthOfMonth()
      Returns the length of the month represented by this date.
      EthiopicDate minus​(long amountToSubtract, java.time.temporal.TemporalUnit unit)  
      EthiopicDate minus​(java.time.temporal.TemporalAmount amount)  
      static EthiopicDate now()
      Obtains the current EthiopicDate from the system clock in the default time-zone.
      static EthiopicDate now​(java.time.Clock clock)
      Obtains the current EthiopicDate from the specified clock.
      static EthiopicDate now​(java.time.ZoneId zone)
      Obtains the current EthiopicDate from the system clock in the specified time-zone.
      static EthiopicDate of​(int prolepticYear, int month, int dayOfMonth)
      Obtains a EthiopicDate representing a date in the Ethiopic calendar system from the proleptic-year, month-of-year and day-of-month fields.
      EthiopicDate plus​(long amountToAdd, java.time.temporal.TemporalUnit unit)  
      EthiopicDate plus​(java.time.temporal.TemporalAmount amount)  
      java.time.temporal.ValueRange range​(java.time.temporal.TemporalField field)  
      long toEpochDay()  
      java.lang.String toString()  
      java.time.chrono.ChronoPeriod until​(java.time.chrono.ChronoLocalDate endDateExclusive)  
      long until​(java.time.temporal.Temporal endExclusive, java.time.temporal.TemporalUnit unit)  
      EthiopicDate with​(java.time.temporal.TemporalAdjuster adjuster)  
      EthiopicDate with​(java.time.temporal.TemporalField field, long newValue)  
      • Methods inherited from class java.lang.Object

        clone, finalize, getClass, notify, notifyAll, wait, wait, wait
      • Methods inherited from interface java.time.chrono.ChronoLocalDate

        adjustInto, compareTo, equals, format, hashCode, isAfter, isBefore, isEqual, isLeapYear, isSupported, isSupported, lengthOfMonth, lengthOfYear, query, toEpochDay, toString
      • Methods inherited from interface java.time.temporal.TemporalAccessor

        get, getLong, range
    • Method Detail

      • now

        public static EthiopicDate now()
        Obtains the current EthiopicDate from the system clock in the default time-zone.

        This will query the system clock in the default time-zone to obtain the current date.

        Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.

        Returns:
        the current date using the system clock and default time-zone, not null
      • now

        public static EthiopicDate now​(java.time.ZoneId zone)
        Obtains the current EthiopicDate from the system clock in the specified time-zone.

        This will query the system clock to obtain the current date. Specifying the time-zone avoids dependence on the default time-zone.

        Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.

        Parameters:
        zone - the zone ID to use, not null
        Returns:
        the current date using the system clock, not null
      • now

        public static EthiopicDate now​(java.time.Clock clock)
        Obtains the current EthiopicDate from the specified clock.

        This will query the specified clock to obtain the current date - today. Using this method allows the use of an alternate clock for testing. The alternate clock may be introduced using dependency injection.

        Parameters:
        clock - the clock to use, not null
        Returns:
        the current date, not null
        Throws:
        java.time.DateTimeException - if the current date cannot be obtained
      • of

        public static EthiopicDate of​(int prolepticYear,
                                      int month,
                                      int dayOfMonth)
        Obtains a EthiopicDate representing a date in the Ethiopic calendar system from the proleptic-year, month-of-year and day-of-month fields.

        This returns a EthiopicDate with the specified fields. The day must be valid for the year and month, otherwise an exception will be thrown.

        Parameters:
        prolepticYear - the Ethiopic proleptic-year
        month - the Ethiopic month-of-year, from 1 to 13
        dayOfMonth - the Ethiopic day-of-month, from 1 to 30
        Returns:
        the date in Ethiopic calendar system, not null
        Throws:
        java.time.DateTimeException - if the value of any field is out of range, or if the day-of-month is invalid for the month-year
      • from

        public static EthiopicDate from​(java.time.temporal.TemporalAccessor temporal)
        Obtains a EthiopicDate from a temporal object.

        This obtains a date in the Ethiopic calendar system based on the specified temporal. A TemporalAccessor represents an arbitrary set of date and time information, which this factory converts to an instance of EthiopicDate.

        The conversion typically uses the EPOCH_DAY field, which is standardized across calendar systems.

        This method matches the signature of the functional interface TemporalQuery allowing it to be used as a query via method reference, EthiopicDate::from.

        Parameters:
        temporal - the temporal object to convert, not null
        Returns:
        the date in Ethiopic calendar system, not null
        Throws:
        java.time.DateTimeException - if unable to convert to a EthiopicDate
      • getChronology

        public EthiopicChronology getChronology()
        Gets the chronology of this date, which is the Ethiopic calendar system.

        The Chronology represents the calendar system in use. The era and other fields in ChronoField are defined by the chronology.

        Specified by:
        getChronology in interface java.time.chrono.ChronoLocalDate
        Returns:
        the Ethiopic chronology, not null
      • getEra

        public EthiopicEra getEra()
        Gets the era applicable at this date.

        The Ethiopic calendar system has two eras, 'INCARNATION' and 'BEFORE_INCARNATION', defined by EthiopicEra.

        Specified by:
        getEra in interface java.time.chrono.ChronoLocalDate
        Returns:
        the era applicable at this date, not null
      • with

        public EthiopicDate with​(java.time.temporal.TemporalAdjuster adjuster)
        Specified by:
        with in interface java.time.chrono.ChronoLocalDate
        Specified by:
        with in interface java.time.temporal.Temporal
      • with

        public EthiopicDate with​(java.time.temporal.TemporalField field,
                                 long newValue)
        Specified by:
        with in interface java.time.chrono.ChronoLocalDate
        Specified by:
        with in interface java.time.temporal.Temporal
      • plus

        public EthiopicDate plus​(java.time.temporal.TemporalAmount amount)
        Specified by:
        plus in interface java.time.chrono.ChronoLocalDate
        Specified by:
        plus in interface java.time.temporal.Temporal
      • plus

        public EthiopicDate plus​(long amountToAdd,
                                 java.time.temporal.TemporalUnit unit)
        Specified by:
        plus in interface java.time.chrono.ChronoLocalDate
        Specified by:
        plus in interface java.time.temporal.Temporal
      • minus

        public EthiopicDate minus​(java.time.temporal.TemporalAmount amount)
        Specified by:
        minus in interface java.time.chrono.ChronoLocalDate
        Specified by:
        minus in interface java.time.temporal.Temporal
      • minus

        public EthiopicDate minus​(long amountToSubtract,
                                  java.time.temporal.TemporalUnit unit)
        Specified by:
        minus in interface java.time.chrono.ChronoLocalDate
        Specified by:
        minus in interface java.time.temporal.Temporal
      • atTime

        public java.time.chrono.ChronoLocalDateTime<EthiopicDate> atTime​(java.time.LocalTime localTime)
        Specified by:
        atTime in interface java.time.chrono.ChronoLocalDate
      • until

        public long until​(java.time.temporal.Temporal endExclusive,
                          java.time.temporal.TemporalUnit unit)
        Specified by:
        until in interface java.time.chrono.ChronoLocalDate
        Specified by:
        until in interface java.time.temporal.Temporal
      • until

        public java.time.chrono.ChronoPeriod until​(java.time.chrono.ChronoLocalDate endDateExclusive)
        Specified by:
        until in interface java.time.chrono.ChronoLocalDate
      • lengthOfMonth

        public int lengthOfMonth()
        Returns the length of the month represented by this date.

        This returns the length of the month in days. Months 1 to 12 have 30 days. Month 13 has 5 or 6 days.

        Returns:
        the length of the month in days, from 5 to 30
      • toEpochDay

        public long toEpochDay()
      • range

        public java.time.temporal.ValueRange range​(java.time.temporal.TemporalField field)
        Specified by:
        range in interface java.time.temporal.TemporalAccessor
      • getLong

        public long getLong​(java.time.temporal.TemporalField field)
        Specified by:
        getLong in interface java.time.temporal.TemporalAccessor
      • equals

        public boolean equals​(java.lang.Object obj)
        Compares this date to another date, including the chronology.

        Compares this date with another ensuring that the date is the same.

        Only objects of this concrete type are compared, other types return false. To compare the dates of two TemporalAccessor instances, including dates in two different chronologies, use ChronoField.EPOCH_DAY as a comparator.

        Specified by:
        equals in interface java.time.chrono.ChronoLocalDate
        Overrides:
        equals in class java.lang.Object
        Parameters:
        obj - the object to check, null returns false
        Returns:
        true if this is equal to the other date
      • hashCode

        public int hashCode()
        A hash code for this date.
        Specified by:
        hashCode in interface java.time.chrono.ChronoLocalDate
        Overrides:
        hashCode in class java.lang.Object
        Returns:
        a suitable hash code based only on the Chronology and the date
      • toString

        public java.lang.String toString()
        Specified by:
        toString in interface java.time.chrono.ChronoLocalDate
        Overrides:
        toString in class java.lang.Object