JulianDate (ThreeTen-extra 0.9 API)

java.lang.Object
- org.threeten.extra.chrono.JulianDate

All Implemented Interfaces:

Serializable, Comparable<java.time.chrono.ChronoLocalDate>, java.time.chrono.ChronoLocalDate, java.time.temporal.Temporal, java.time.temporal.TemporalAccessor, java.time.temporal.TemporalAdjuster
```
public final class JulianDate
extends Object
implements java.time.chrono.ChronoLocalDate, Serializable
```
A date in the Julian calendar system.
This date operates using the Julian calendar. This calendar system is the forerunner to the modern Gregorian and ISO calendars. The Julian differs from the Gregorian only in terms of the leap year rule. Dates are aligned such that 0001-01-01 (Julian) is 0000-12-30 (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 and Description
`java.time.chrono.ChronoLocalDateTime<JulianDate>`	`atTime(java.time.LocalTime localTime)`
`boolean`	`equals(Object obj)` Compares this date to another date, including the chronology.
`static JulianDate`	`from(java.time.temporal.TemporalAccessor temporal)` Obtains a `JulianDate` from a temporal object.
`JulianChronology`	`getChronology()` Gets the chronology of this date, which is the Julian calendar system.
`JulianEra`	`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.
`JulianDate`	`minus(long amountToSubtract, java.time.temporal.TemporalUnit unit)`
`JulianDate`	`minus(java.time.temporal.TemporalAmount amount)`
`static JulianDate`	`now()` Obtains the current `JulianDate` from the system clock in the default time-zone.
`static JulianDate`	`now(java.time.Clock clock)` Obtains the current `JulianDate` from the specified clock.
`static JulianDate`	`now(java.time.ZoneId zone)` Obtains the current `JulianDate` from the system clock in the specified time-zone.
`static JulianDate`	`of(int prolepticYear, int month, int dayOfMonth)` Obtains a `JulianDate` representing a date in the Julian calendar system from the proleptic-year, month-of-year and day-of-month fields.
`JulianDate`	`plus(long amountToAdd, java.time.temporal.TemporalUnit unit)`
`JulianDate`	`plus(java.time.temporal.TemporalAmount amount)`
`java.time.temporal.ValueRange`	`range(java.time.temporal.TemporalField field)`
`long`	`toEpochDay()`
`String`	`toString()`
`java.time.chrono.ChronoPeriod`	`until(java.time.chrono.ChronoLocalDate endDateExclusive)`
`long`	`until(java.time.temporal.Temporal endExclusive, java.time.temporal.TemporalUnit unit)`
`JulianDate`	`with(java.time.temporal.TemporalAdjuster adjuster)`
`JulianDate`	`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, lengthOfYear, query, timeLineOrder, toString

Methods inherited from interface java.time.temporal.TemporalAccessor
get, getLong, range

- Method Detail
  - now
```
public static JulianDate now()
```
    Obtains the current JulianDate 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 JulianDate now(java.time.ZoneId zone)
```
    Obtains the current JulianDate 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 JulianDate now(java.time.Clock clock)
```
    Obtains the current JulianDate 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 JulianDate of(int prolepticYear,
                            int month,
                            int dayOfMonth)
```
    Obtains a JulianDate representing a date in the Julian calendar system from the proleptic-year, month-of-year and day-of-month fields.
    This returns a JulianDate with the specified fields. The day must be valid for the year and month, otherwise an exception will be thrown.
    
    Parameters:
    
    prolepticYear - the Julian proleptic-year
    
    month - the Julian month-of-year, from 1 to 12
    
    dayOfMonth - the Julian day-of-month, from 1 to 31
    
    Returns:
    
    the date in Julian 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 JulianDate from(java.time.temporal.TemporalAccessor temporal)
```
    Obtains a JulianDate from a temporal object.
    This obtains a date in the Julian 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 JulianDate.
    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, JulianDate::from.
    
    Specified by:
    
    from in interface java.time.chrono.ChronoLocalDate
    
    Parameters:
    
    temporal - the temporal object to convert, not null
    
    Returns:
    
    the date in Julian calendar system, not null
    
    Throws:
    
    java.time.DateTimeException - if unable to convert to a JulianDate
  - getChronology
```
public JulianChronology getChronology()
```
    Gets the chronology of this date, which is the Julian 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 Julian chronology, not null
  - getEra
```
public JulianEra getEra()
```
    Gets the era applicable at this date.
    The Julian calendar system has two eras, 'AD' and 'BC', defined by JulianEra.
    
    Specified by:
    
    getEra in interface java.time.chrono.ChronoLocalDate
    
    Returns:
    
    the era applicable at this date, not null
  - lengthOfMonth
```
public int lengthOfMonth()
```
    Returns the length of the month represented by this date.
    This returns the length of the month in days. Month lengths match those of the ISO calendar system.
    
    Specified by:
    
    lengthOfMonth in interface java.time.chrono.ChronoLocalDate
    
    Returns:
    
    the length of the month in days, from 28 to 31
  - with
```
public JulianDate 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 JulianDate 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 JulianDate 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 JulianDate 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 JulianDate 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 JulianDate 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<JulianDate> 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
  - toEpochDay
```
public long toEpochDay()
```
    Specified by:
    
    toEpochDay in interface java.time.chrono.ChronoLocalDate
  - 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(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 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 Object
    
    Returns:
    
    a suitable hash code based only on the Chronology and the date
  - toString
```
public String toString()
```
    Specified by:
    
    toString in interface java.time.chrono.ChronoLocalDate
    
    Overrides:
    
    toString in class Object

Class JulianDate

Implementation Requirements

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface java.time.chrono.ChronoLocalDate

Methods inherited from interface java.time.temporal.TemporalAccessor

Method Detail

now

now

now

of

from

getChronology

getEra

lengthOfMonth

with

with

plus

plus

minus

minus

atTime

until

until

toEpochDay

range

getLong

equals

hashCode

toString