org.threeten.bp.chrono

ChronoDateImpl

abstract class ChronoDateImpl[D <: ChronoLocalDate] extends ChronoLocalDate with Temporal with TemporalAdjuster with Serializable

A date expressed in terms of a standard year-month-day calendar system.

This class is used by applications seeking to handle dates in non-ISO calendar systems. For example, the Japanese, Minguo, Thai Buddhist and others.

ChronoLocalDate is built on the generic concepts of year, month and day. The calendar system, represented by a Chronology, expresses the relationship between the fields and this class allows the resulting date to be manipulated.

Note that not all calendar systems are suitable for use with this class. For example, the Mayan calendar uses a system that bears no relation to years, months and days.

The API design encourages the use of LocalDate for the majority of the application. This includes code to read and write from a persistent data store, such as a database, and to send dates and times across a network. The ChronoLocalDate instance is then used at the user interface level to deal with localized input/output.

Example:

System.out.printf("Example()%n");
// Enumerate the list of available calendars and print today for each
Set<Chrono> chronos = Chrono.getAvailableChronologies();
for (Chrono chrono : chronos) {
ChronoLocalDate date = chrono.dateNow();
System.out.printf("   %20s: %s%n", chrono.getID(), date.toString());
}

// Print the Hijrah date and calendar
ChronoLocalDate date = Chrono.of("Hijrah").dateNow();
int day = date.get(ChronoField.DAY_OF_MONTH);
int dow = date.get(ChronoField.DAY_OF_WEEK);
int month = date.get(ChronoField.MONTH_OF_YEAR);
int year = date.get(ChronoField.YEAR);
System.out.printf("  Today is %s %s %d-%s-%d%n", date.getChrono().getID(),
dow, day, month, year);

// Print today's date and the last day of the year
ChronoLocalDate now1 = Chrono.of("Hijrah").dateNow();
ChronoLocalDate first = now1.with(ChronoField.DAY_OF_MONTH, 1)
.with(ChronoField.MONTH_OF_YEAR, 1);
ChronoLocalDate last = first.plus(1, ChronoUnit.YEARS)
.minus(1, ChronoUnit.DAYS);
System.out.printf("  Today is %s: start: %s; end: %s%n", last.getChrono().getID(),
first, last);

Adding Calendars

The set of calendars is extensible by defining a subclass of ChronoLocalDate to represent a date instance and an implementation of Chronology to be the factory for the ChronoLocalDate subclass.

To permit the discovery of the additional calendar types the implementation of Chronology must be registered as a Service implementing the Chronology interface in the META-INF/Services file as per the specification of java.util.ServiceLoader. The subclass must function according to the Chronology class description and must provide its Chronology#getID calendar name and Chronology#getCalendarType() calendar type.

Specification for implementors

This abstract class must be implemented with care to ensure other classes operate correctly. All implementations that can be instantiated must be final, immutable and thread-safe. Subclasses should be Serializable wherever possible.

D

the date type

Annotations
@SerialVersionUID( 6282433883239719096L )
Linear Supertypes
Serializable, ChronoLocalDate, Ordered[ChronoLocalDate], Comparable[ChronoLocalDate], TemporalAdjuster, Temporal, TemporalAccessor, AnyRef, Any
Known Subclasses
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Inherited
  1. ChronoDateImpl
  2. Serializable
  3. ChronoLocalDate
  4. Ordered
  5. Comparable
  6. TemporalAdjuster
  7. Temporal
  8. TemporalAccessor
  9. AnyRef
  10. Any
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Abstract Value Members

  1. abstract def getChronology: Chronology

    Gets the chronology of this date.

    Gets the chronology of this date.

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

    returns

    the chronology, not null

    Definition Classes
    ChronoLocalDate
  2. abstract def getLong(field: TemporalField): Long

    Gets the value of the specified field as a long.

    Gets the value of the specified field as a long.

    This queries the date-time for the value for the specified field. The returned value may be outside the valid range of values for the field. If the date-time cannot return the value, because the field is unsupported or for some other reason, an exception will be thrown.

    Specification for implementors

    Implementations must check and handle all fields defined in ChronoField. If the field is supported, then the value of the field must be returned. If unsupported, then a DateTimeException must be thrown.

    If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.getFrom(TemporalAccessor) passing this as the argument.

    Implementations must not alter either this object.

    field

    the field to get, not null

    returns

    the value for the field

    Definition Classes
    TemporalAccessor
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if a value for the field cannot be obtained

  3. abstract def lengthOfMonth: Int

    Returns the length of the month represented by this date, as defined by the calendar system.

    Returns the length of the month represented by this date, as defined by the calendar system.

    This returns the length of the month in days.

    returns

    the length of the month in days

    Definition Classes
    ChronoLocalDate
  4. abstract def with(field: TemporalField, newValue: Long): ChronoLocalDate

    Returns an object of the same type as this object with the specified field altered.

    Returns an object of the same type as this object with the specified field altered.

    This returns a new object based on this one with the value for the specified field changed. For example, on a LocalDate, this could be used to set the year, month or day-of-month. The returned object will have the same observable type as this object.

    In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st January, then changing the month to February would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.

    Specification for implementors

    Implementations must check and handle all fields defined in ChronoField. If the field is supported, then the adjustment must be performed. If unsupported, then a DateTimeException must be thrown.

    If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.adjustInto(Temporal, long) passing this as the first argument.

    Implementations must not alter either this object or the specified temporal object. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable implementations.

    field

    the field to set in the result, not null

    newValue

    the new value of the field in the result

    returns

    an object of the same type with the specified field set, not null

    Definition Classes
    ChronoLocalDateTemporal
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if the field cannot be set

Concrete Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any
  3. final def ##(): Int

    Definition Classes
    AnyRef → Any
  4. def <(that: ChronoLocalDate): Boolean

    Definition Classes
    Ordered
  5. def <=(that: ChronoLocalDate): Boolean

    Definition Classes
    Ordered
  6. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  7. final def ==(arg0: Any): Boolean

    Definition Classes
    Any
  8. def >(that: ChronoLocalDate): Boolean

    Definition Classes
    Ordered
  9. def >=(that: ChronoLocalDate): Boolean

    Definition Classes
    Ordered
  10. def adjustInto(temporal: Temporal): Temporal

    Adjusts the specified temporal object.

    Adjusts the specified temporal object.

    This adjusts the specified temporal object using the logic encapsulated in the implementing class. Examples might be an adjuster that sets the date avoiding weekends, or one that sets the date to the last day of the month.

    There are two equivalent ways of using this method. The first is to invoke this method directly. The second is to use Temporal#with(TemporalAdjuster):

    // these two lines are equivalent, but the second approach is recommended
    temporal = thisAdjuster.adjustInto(temporal);
    temporal = temporal.with(thisAdjuster);
    
    It is recommended to use the second approach, with(TemporalAdjuster), as it is a lot clearer to read in code.

    Specification for implementors

    The implementation must take the input object and adjust it. The implementation defines the logic of the adjustment and is responsible for documenting that logic. It may use any method on Temporal to query the temporal object and perform the adjustment. The returned object must have the same observable type as the input object

    The input object must not be altered. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable temporal objects.

    The input temporal object may be in a calendar system other than ISO. Implementations may choose to document compatibility with other calendar systems, or reject non-ISO temporal objects by TemporalQueries#chronology() querying the chronology.

    This method may be called from multiple threads in parallel. It must be thread-safe when invoked.

    temporal

    the temporal object to adjust, not null

    returns

    an object of the same observable type with the adjustment made, not null

    Definition Classes
    ChronoLocalDateTemporalAdjuster
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if unable to make the adjustment

  11. final def asInstanceOf[T0]: T0

    Definition Classes
    Any
  12. def atTime(localTime: LocalTime): ChronoLocalDateTime[_ <: ChronoLocalDate]

    Combines this date with a time to create a ChronoLocalDateTime.

    Combines this date with a time to create a ChronoLocalDateTime.

    This returns a ChronoLocalDateTime formed from this date at the specified time. All possible combinations of date and time are valid.

    localTime

    the local time to use, not null

    returns

    the local date-time formed from this date and the specified time, not null

    Definition Classes
    ChronoDateImplChronoLocalDate
  13. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  14. def compare(other: ChronoLocalDate): Int

    Compares this date to another date, including the chronology.

    Compares this date to another date, including the chronology.

    The comparison is based first on the underlying time-line date, then on the chronology. It is "consistent with equals", as defined by Comparable.

    For example, the following is the comparator order:

    • 2012-12-03 (ISO)
    • 2012-12-04 (ISO)
    • 2555-12-04 (ThaiBuddhist)
    • 2012-12-05 (ISO)

    Values #2 and #3 represent the same date on the time-line. When two values represent the same date, the chronology ID is compared to distinguish them. This step is needed to make the ordering "consistent with equals".

    If all the date objects being compared are in the same chronology, then the additional chronology stage is not required and only the local date is used. To compare the dates of two TemporalAccessor instances, including dates in two different chronologies, use ChronoField#EPOCH_DAY as a comparator.

    other

    the other date to compare to, not null

    returns

    the comparator value, negative if less, positive if greater

    Definition Classes
    ChronoLocalDate → Ordered
  15. def compareTo(that: ChronoLocalDate): Int

    Definition Classes
    Ordered → Comparable
  16. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  17. def equals(obj: Any): Boolean

    Checks if this date is equal to another date, including the chronology.

    Checks if this date is equal to another date, including the chronology.

    Compares this date with another ensuring that the date and chronology are the same.

    To compare the dates of two TemporalAccessor instances, including dates in two different chronologies, use ChronoField#EPOCH_DAY as a comparator.

    obj

    the object to check, null returns false

    returns

    true if this is equal to the other date

    Definition Classes
    ChronoLocalDate → AnyRef → Any
  18. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  19. def format(formatter: DateTimeFormatter): String

    Formats this date using the specified formatter.

    Formats this date using the specified formatter.

    This date will be passed to the formatter to produce a string.

    The default implementation must behave as follows:

    return formatter.format(this);
    

    formatter

    the formatter to use, not null

    returns

    the formatted date string, not null

    Definition Classes
    ChronoLocalDate
    Exceptions thrown
    DateTimeException

    if an error occurs during printing

  20. def get(field: TemporalField): Int

    Gets the value of the specified field as an int.

    Gets the value of the specified field as an int.

    This queries the date-time for the value for the specified field. The returned value will always be within the valid range of values for the field. If the date-time cannot return the value, because the field is unsupported or for some other reason, an exception will be thrown.

    Specification for implementors

    Implementations must check and handle all fields defined in ChronoField. If the field is supported and has an int range, then the value of the field must be returned. If unsupported, then a DateTimeException must be thrown.

    If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.getFrom(TemporalAccessor) passing this as the argument.

    Implementations must not alter either this object.

    field

    the field to get, not null

    returns

    the value for the field, within the valid range of values

    Definition Classes
    TemporalAccessor
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if the value is outside the range of valid values for the field

  21. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  22. def getEra: Era

    Gets the era, as defined by the chronology.

    Gets the era, as defined by the chronology.

    The era is, conceptually, the largest division of the time-line. Most calendar systems have a single epoch dividing the time-line into two eras. However, some have multiple eras, such as one for the reign of each leader. The exact meaning is determined by the Chronology.

    All correctly implemented Era classes are singletons, thus it is valid code to write date.getEra() == SomeEra.NAME).

    returns

    the chronology specific era constant applicable at this date, not null

    Definition Classes
    ChronoLocalDate
  23. def hashCode(): Int

    A hash code for this date.

    A hash code for this date.

    returns

    a suitable hash code

    Definition Classes
    ChronoLocalDate → AnyRef → Any
  24. def isAfter(other: ChronoLocalDate): Boolean

    Checks if this date is after the specified date ignoring the chronology.

    Checks if this date is after the specified date ignoring the chronology.

    This method differs from the comparison in #compareTo in that it only compares the underlying date and not the chronology. This allows dates in different calendar systems to be compared based on the time-line position. This is equivalent to using date1.toEpochDay() > date2.toEpochDay().

    other

    the other date to compare to, not null

    returns

    true if this is after the specified date

    Definition Classes
    ChronoLocalDate
  25. def isBefore(other: ChronoLocalDate): Boolean

    Checks if this date is before the specified date ignoring the chronology.

    Checks if this date is before the specified date ignoring the chronology.

    This method differs from the comparison in #compareTo in that it only compares the underlying date and not the chronology. This allows dates in different calendar systems to be compared based on the time-line position. This is equivalent to using date1.toEpochDay() < date2.toEpochDay().

    other

    the other date to compare to, not null

    returns

    true if this is before the specified date

    Definition Classes
    ChronoLocalDate
  26. def isEqual(other: ChronoLocalDate): Boolean

    Checks if this date is equal to the specified date ignoring the chronology.

    Checks if this date is equal to the specified date ignoring the chronology.

    This method differs from the comparison in #compareTo in that it only compares the underlying date and not the chronology. This allows dates in different calendar systems to be compared based on the time-line position. This is equivalent to using date1.toEpochDay() == date2.toEpochDay().

    other

    the other date to compare to, not null

    returns

    true if the underlying date is equal to the specified date

    Definition Classes
    ChronoLocalDate
  27. final def isInstanceOf[T0]: Boolean

    Definition Classes
    Any
  28. def isLeapYear: Boolean

    Checks if the year is a leap year, as defined by the calendar system.

    Checks if the year is a leap year, as defined by the calendar system.

    A leap-year is a year of a longer length than normal. The exact meaning is determined by the chronology with the constraint that a leap-year must imply a year-length longer than a non leap-year.

    The default implementation uses Chronology#isLeapYear(long).

    returns

    true if this date is in a leap year, false otherwise

    Definition Classes
    ChronoLocalDate
  29. def isSupported(unit: TemporalUnit): Boolean

    Checks if the specified unit is supported.

    Checks if the specified unit is supported.

    This checks if the date-time can be queried for the specified unit. If false, then calling the #plus(TemporalAmount) plus and #minus(TemporalAmount) minus methods will throw an exception.

    Specification for implementors

    Implementations must check and handle all fields defined in ChronoUnit. If the field is supported, then true is returned, otherwise false

    If the field is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.isSupportedBy(Temporal) passing this as the argument.

    Implementations must not alter this object.

    unit

    the unit to check, null returns false

    returns

    true if this date-time can be queried for the unit, false if not

    Definition Classes
    ChronoLocalDateTemporal
  30. def isSupported(field: TemporalField): Boolean

    Checks if the specified field is supported.

    Checks if the specified field is supported.

    This checks if the date-time can be queried for the specified field. If false, then calling the #range(TemporalField) range and #get(TemporalField) get methods will throw an exception.

    Specification for implementors

    Implementations must check and handle all fields defined in ChronoField. If the field is supported, then true is returned, otherwise false

    If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.isSupportedBy(TemporalAccessor) passing this as the argument.

    Implementations must not alter this object.

    field

    the field to check, null returns false

    returns

    true if this date-time can be queried for the field, false if not

    Definition Classes
    ChronoLocalDateTemporalAccessor
  31. def lengthOfYear: Int

    Returns the length of the year represented by this date, as defined by the calendar system.

    Returns the length of the year represented by this date, as defined by the calendar system.

    This returns the length of the year in days.

    The default implementation uses #isLeapYear() and returns 365 or 366.

    returns

    the length of the year in days

    Definition Classes
    ChronoLocalDate
  32. def minus(amountToSubtract: Long, unit: TemporalUnit): ChronoLocalDate

    Returns an object of the same type as this object with the specified period subtracted.

    Returns an object of the same type as this object with the specified period subtracted.

    This method returns a new object based on this one with the specified period subtracted. For example, on a LocalDate, this could be used to subtract a number of years, months or days. The returned object will have the same observable type as this object.

    In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st March, then subtracting one month would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.

    If the implementation represents a date-time that has boundaries, such as LocalTime, then the permitted units must include the boundary unit, but no multiples of the boundary unit. For example, LocalTime must accept DAYS but not WEEKS or MONTHS.

    Specification for implementors

    Implementations must behave in a manor equivalent to the default method behavior.

    Implementations must not alter either this object or the specified temporal object. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable implementations.

    amountToSubtract

    the amount of the specified unit to subtract, may be negative

    unit

    the unit of the period to subtract, not null

    returns

    an object of the same type with the specified period subtracted, not null

    Definition Classes
    ChronoLocalDateTemporal
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if the unit cannot be subtracted

  33. def minus(amount: TemporalAmount): ChronoLocalDate

    Returns an object of the same type as this object with an amount subtracted.

    Returns an object of the same type as this object with an amount subtracted.

    This adjusts this temporal, subtracting according to the rules of the specified amount. The amount is typically a Period but may be any other type implementing the TemporalAmount interface, such as Duration.

    Some example code indicating how and why this method is used:

    date = date.minus(period);                  // subtract a Period instance
    date = date.minus(duration);                // subtract a Duration instance
    date = date.minus(workingDays(6));          // example user-written workingDays method
    

    Note that calling plus followed by minus is not guaranteed to return the same date-time.

    Specification for implementors

    Implementations must not alter either this object. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable implementations.

    amount

    the amount to subtract, not null

    returns

    an object of the same type with the specified adjustment made, not null

    Definition Classes
    ChronoLocalDateTemporal
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if the subtraction cannot be made

  34. final def ne(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  35. final def notify(): Unit

    Definition Classes
    AnyRef
  36. final def notifyAll(): Unit

    Definition Classes
    AnyRef
  37. def plus(amountToAdd: Long, unit: TemporalUnit): ChronoDateImpl[D]

    Returns an object of the same type as this object with the specified period added.

    Returns an object of the same type as this object with the specified period added.

    This method returns a new object based on this one with the specified period added. For example, on a LocalDate, this could be used to add a number of years, months or days. The returned object will have the same observable type as this object.

    In some cases, changing a field is not fully defined. For example, if the target object is a date representing the 31st January, then adding one month would be unclear. In cases like this, the field is responsible for resolving the result. Typically it will choose the previous valid date, which would be the last valid day of February in this example.

    If the implementation represents a date-time that has boundaries, such as LocalTime, then the permitted units must include the boundary unit, but no multiples of the boundary unit. For example, LocalTime must accept DAYS but not WEEKS or MONTHS.

    Specification for implementors

    Implementations must check and handle all units defined in ChronoUnit. If the unit is supported, then the addition must be performed. If unsupported, then a DateTimeException must be thrown.

    If the unit is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.addTo(Temporal, long) passing this as the first argument.

    Implementations must not alter either this object or the specified temporal object. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable implementations.

    amountToAdd

    the amount of the specified unit to add, may be negative

    unit

    the unit of the period to add, not null

    returns

    an object of the same type with the specified period added, not null

    Definition Classes
    ChronoDateImplChronoLocalDateTemporal
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if the unit cannot be added

  38. def plus(amount: TemporalAmount): ChronoLocalDate

    Returns an object of the same type as this object with an amount added.

    Returns an object of the same type as this object with an amount added.

    This adjusts this temporal, adding according to the rules of the specified amount. The amount is typically a Period but may be any other type implementing the TemporalAmount interface, such as Duration.

    Some example code indicating how and why this method is used:

    date = date.plus(period);                  // add a Period instance
    date = date.plus(duration);                // add a Duration instance
    date = date.plus(workingDays(6));          // example user-written workingDays method
    

    Note that calling plus followed by minus is not guaranteed to return the same date-time.

    Specification for implementors

    Implementations must not alter either this object. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable implementations.

    amount

    the amount to add, not null

    returns

    an object of the same type with the specified adjustment made, not null

    Definition Classes
    ChronoLocalDateTemporal
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if the addition cannot be made

  39. def query[R >: Null](query: TemporalQuery[R]): R

    Queries this date-time.

    Queries this date-time.

    This queries this date-time using the specified query strategy object.

    Queries are a key tool for extracting information from date-times. They exists to externalize the process of querying, permitting different approaches, as per the strategy design pattern. Examples might be a query that checks if the date is the day before February 29th in a leap year, or calculates the number of days to your next birthday.

    The most common query implementations are method references, such as LocalDate::from and ZoneId::from. Further implementations are on TemporalQueries. Queries may also be defined by applications.

    Specification for implementors

    Implementations of this method must behave as follows:

    public <R> R query(TemporalQuery<R> type) {
    // only include an if statement if the implementation can return it
    if (query == TemporalQueries.zoneId())  return // the ZoneId
    if (query == TemporalQueries.chronology())  return // the Chrono
    if (query == TemporalQueries.precision())  return // the precision
    // call default method
    return super.query(query);
    }
    

    R

    the type of the result

    query

    the query to invoke, not null

    returns

    the query result, null may be returned (defined by the query)

    Definition Classes
    ChronoLocalDateTemporalAccessor
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if unable to query

  40. def range(field: TemporalField): ValueRange

    Gets the range of valid values for the specified field.

    Gets the range of valid values for the specified field.

    All fields can be expressed as a long integer. This method returns an object that describes the valid range for that value. The value of this temporal object is used to enhance the accuracy of the returned range. If the date-time cannot return the range, because the field is unsupported or for some other reason, an exception will be thrown.

    Note that the result only describes the minimum and maximum valid values and it is important not to read too much into them. For example, there could be values within the range that are invalid for the field.

    Specification for implementors

    Implementations must check and handle all fields defined in ChronoField. If the field is supported, then the range of the field must be returned. If unsupported, then a DateTimeException must be thrown.

    If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.rangeRefinedBy(TemporalAccessorl) passing this as the argument.

    Implementations must not alter either this object.

    field

    the field to query the range for, not null

    returns

    the range of valid values for the field, not null

    Definition Classes
    TemporalAccessor
    Exceptions thrown
    DateTimeException

    if the range for the field cannot be obtained

  41. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  42. def toEpochDay: Long

    Converts this date to the Epoch Day.

    Converts this date to the Epoch Day.

    The ChronoField#EPOCH_DAY Epoch Day count is a simple incrementing count of days where day 0 is 1970-01-01 (ISO). This definition is the same for all chronologies, enabling conversion.

    returns

    the Epoch Day equivalent to this date

    Definition Classes
    ChronoLocalDate
  43. def toString(): String

    Outputs this date as a String.

    Outputs this date as a String.

    The output will include the full local date and the chronology ID.

    returns

    the formatted date, not null

    Definition Classes
    ChronoLocalDate → AnyRef → Any
  44. def until(endDate: ChronoLocalDate): ChronoPeriod

    Calculates the period between this date and another date as a ChronoPeriod.

    Calculates the period between this date and another date as a ChronoPeriod.

    This calculates the period between two dates. All supplied chronologies calculate the period using years, months and days, however the ChronoPeriod API allows the period to be represented using other units.

    The start and end points are this and the specified date. The result will be negative if the end is before the start. The negative sign will be the same in each of year, month and day.

    The calculation is performed using the chronology of this date. If necessary, the input date will be converted to match.

    This instance is immutable and unaffected by this method call.

    returns

    the period between this date and the end date, not null

    Definition Classes
    ChronoDateImplChronoLocalDate
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if the period cannot be calculated

  45. def until(endExclusive: Temporal, unit: TemporalUnit): Long

    Calculates the period between this temporal and another temporal in terms of the specified unit.

    Calculates the period between this temporal and another temporal in terms of the specified unit.

    This calculates the period between two temporals in terms of a single unit. The start and end points are this and the specified temporal. The result will be negative if the end is before the start. For example, the period in hours between two temporal objects can be calculated using startTime.until(endTime, HOURS).

    The calculation returns a whole number, representing the number of complete units between the two temporals. For example, the period in hours between the times 11:30 and 13:29 will only be one hour as it is one minute short of two hours.

    There are two equivalent ways of using this method. The first is to invoke this method directly. The second is to use TemporalUnit#between(Temporal, Temporal):

    // these two lines are equivalent
    between = thisUnit.between(start, end);
    between = start.until(end, thisUnit);
    
    The choice should be made based on which makes the code more readable.

    For example, this method allows the number of days between two dates to be calculated:

    val daysBetween: Long = DAYS.between(start, end);
    // or alternatively
    val daysBetween: Long = start.until(end, DAYS);
    

    Specification for implementors

    Implementations must begin by checking to ensure that the input temporal object is of the same observable type as the implementation. They must then perform the calculation for all instances of ChronoUnit. A DateTimeException must be thrown for ChronoUnit instances that are unsupported.

    If the unit is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.between(Temporal, Temporal) passing this as the first argument and the input temporal as the second argument.

    In summary, implementations must behave in a manner equivalent to this code:

    // check input temporal is the same type as this class
    if (unit instanceof ChronoUnit) {
    // if unit is supported, then calculate and return result
    // else throw DateTimeException for unsupported units
    }
    return unit.between(this, endTemporal);
    

    The target object must not be altered by this method.

    unit

    the unit to measure the period in, not null

    returns

    the amount of the period between this and the end

    Definition Classes
    ChronoDateImplTemporal
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if the period cannot be calculated

  46. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  47. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  48. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  49. def with(adjuster: TemporalAdjuster): ChronoLocalDate

    Returns an adjusted object of the same type as this object with the adjustment made.

    Returns an adjusted object of the same type as this object with the adjustment made.

    This adjusts this date-time according to the rules of the specified adjuster. A simple adjuster might simply set the one of the fields, such as the year field. A more complex adjuster might set the date to the last day of the month. A selection of common adjustments is provided in TemporalAdjusters. These include finding the "last day of the month" and "next Wednesday". The adjuster is responsible for handling special cases, such as the varying lengths of month and leap years.

    Some example code indicating how and why this method is used:

    date = date.with(Month.JULY);        // most key classes implement TemporalAdjuster
    date = date.with(lastDayOfMonth());  // static import from TemporalAdjusters
    date = date.with(next(WEDNESDAY));   // static import from TemporalAdjusters and DayOfWeek
    

    Specification for implementors

    Implementations must not alter either this object. Instead, an adjusted copy of the original must be returned. This provides equivalent, safe behavior for immutable and mutable implementations.

    adjuster

    the adjuster to use, not null

    returns

    an object of the same type with the specified adjustment made, not null

    Definition Classes
    ChronoLocalDateTemporal
    Exceptions thrown
    ArithmeticException

    if numeric overflow occurs

    DateTimeException

    if unable to make the adjustment

Inherited from Serializable

Inherited from ChronoLocalDate

Inherited from Ordered[ChronoLocalDate]

Inherited from Comparable[ChronoLocalDate]

Inherited from TemporalAdjuster

Inherited from Temporal

Inherited from TemporalAccessor

Inherited from AnyRef

Inherited from Any

Ungrouped