org.joda.time

Class LocalDate

Implemented Interfaces:
Comparable, ReadablePartial, Serializable

public final class LocalDate
extends BaseLocal
implements ReadablePartial, Serializable

LocalDate is an immutable datetime class representing a date without a time zone.

LocalDate implements the ReadablePartial interface. To do this, the interface methods focus on the key fields - Year, MonthOfYear and DayOfMonth. However, all date fields may in fact be queried.

LocalDate differs from DateMidnight in that this class does not have a time zone and does not represent a single instant in time.

Calculations on LocalDate are performed using a Chronology. This chronology will be set internally to be in the UTC time zone for all calculations.

Each individual field can be queried in two ways:

The second technique also provides access to other useful methods on the field:

LocalDate is thread-safe and immutable, provided that the Chronology is as well. All standard Chronology classes supplied are thread-safe and immutable.

Author:
Stephen Colebourne
Since:
1.3

Nested Class Summary

static class
LocalDate.Property
LocalDate.Property binds a LocalDate to a DateTimeField allowing powerful datetime functionality to be easily accessed.

Constructor Summary

LocalDate()
Constructs an instance set to the current local time evaluated using ISO chronology in the default zone.
LocalDate(Object instant)
Constructs an instance from an Object that represents a datetime.
LocalDate(Object instant, Chronology chronology)
Constructs an instance from an Object that represents a datetime, using the specified chronology.
LocalDate(Object instant, DateTimeZone zone)
Constructs an instance from an Object that represents a datetime, forcing the time zone to that specified.
LocalDate(int year, int monthOfYear, int dayOfMonth)
Constructs an instance set to the specified date and time using ISOChronology.
LocalDate(int year, int monthOfYear, int dayOfMonth, Chronology chronology)
Constructs an instance set to the specified date and time using the specified chronology, whose zone is ignored.
LocalDate(long instant)
Constructs an instance set to the local time defined by the specified instant evaluated using ISO chronology in the default zone.
LocalDate(long instant, Chronology chronology)
Constructs an instance set to the local time defined by the specified instant evaluated using the specified chronology.
LocalDate(long instant, DateTimeZone zone)
Constructs an instance set to the local time defined by the specified instant evaluated using ISO chronology in the specified zone.
LocalDate(Chronology chronology)
Constructs an instance set to the current local time evaluated using specified chronology.
LocalDate(DateTimeZone zone)
Constructs an instance set to the current local time evaluated using ISO chronology in the specified zone.

Method Summary

LocalDate.Property
centuryOfEra()
Get the century of era property which provides access to advanced functionality.
int
compareTo(Object partial)
Compares this partial with another returning an integer indicating the order.
LocalDate.Property
dayOfMonth()
Get the day of month property which provides access to advanced functionality.
LocalDate.Property
dayOfWeek()
Get the day of week property which provides access to advanced functionality.
LocalDate.Property
dayOfYear()
Get the day of year property which provides access to advanced functionality.
boolean
equals(Object partial)
Compares this ReadablePartial with another returning true if the chronology, field types and values are equal.
LocalDate.Property
era()
Get the era property which provides access to advanced functionality.
static LocalDate
fromCalendarFields(Calendar calendar)
Constructs a LocalDate from a java.util.Calendar using exactly the same field values avoiding any time zone effects.
static LocalDate
fromDateFields(Date date)
Constructs a LocalDate from a java.util.Date using exactly the same field values avoiding any time zone effects.
int
get(DateTimeFieldType fieldType)
Get the value of one of the fields of a datetime.
int
getCenturyOfEra()
Get the year of era field value.
Chronology
getChronology()
Gets the chronology of the date.
int
getDayOfMonth()
Get the day of month field value.
int
getDayOfWeek()
Get the day of week field value.
int
getDayOfYear()
Get the day of year field value.
int
getEra()
Get the era field value.
protected DateTimeField
getField(int index, Chronology chrono)
Gets the field for a specific index in the chronology specified.
protected long
getLocalMillis()
Gets the local milliseconds from the Java epoch of 1970-01-01T00:00:00 (not fixed to any specific time zone).
int
getMonthOfYear()
Get the month of year field value.
int
getValue(int index)
Gets the value of the field at the specifed index.
int
getWeekOfWeekyear()
Get the week of weekyear field value.
int
getWeekyear()
Get the weekyear field value.
int
getYear()
Get the year field value.
int
getYearOfCentury()
Get the year of century field value.
int
getYearOfEra()
Get the year of era field value.
boolean
isSupported(DateTimeFieldType type)
Checks if the field type specified is supported by this local date and chronology.
boolean
isSupported(DurationFieldType type)
Checks if the duration type specified is supported by this local date and chronology.
LocalDate
minus(ReadablePeriod period)
Returns a copy of this date with the specified period taken away.
LocalDate
minusDays(int days)
Returns a copy of this date minus the specified number of days.
LocalDate
minusMonths(int months)
Returns a copy of this date minus the specified number of months.
LocalDate
minusWeeks(int weeks)
Returns a copy of this date minus the specified number of weeks.
LocalDate
minusYears(int years)
Returns a copy of this date minus the specified number of years.
LocalDate.Property
monthOfYear()
Get the month of year property which provides access to advanced functionality.
LocalDate
plus(ReadablePeriod period)
Returns a copy of this date with the specified period added.
LocalDate
plusDays(int days)
Returns a copy of this date plus the specified number of days.
LocalDate
plusMonths(int months)
Returns a copy of this date plus the specified number of months.
LocalDate
plusWeeks(int weeks)
Returns a copy of this date plus the specified number of weeks.
LocalDate
plusYears(int years)
Returns a copy of this date plus the specified number of years.
LocalDate.Property
property(DateTimeFieldType fieldType)
Gets the property object for the specified type, which contains many useful methods.
int
size()
Gets the number of fields in this partial, which is three.
DateMidnight
toDateMidnight()
Converts this LocalDate to a DateMidnight in the default time zone.
DateMidnight
toDateMidnight(DateTimeZone zone)
Converts this LocalDate to a DateMidnight.
DateTime
toDateTime(LocalTime time)
Converts this object to a DateTime using a LocalTime to fill in the missing fields and using the default time zone.
DateTime
toDateTime(LocalTime time, DateTimeZone zone)
Converts this object to a DateTime using a LocalTime to fill in the missing fields.
DateTime
toDateTimeAtCurrentTime()
Converts this LocalDate to a full datetime using the default time zone setting the date fields from this instance and the time fields from the current time.
DateTime
toDateTimeAtCurrentTime(DateTimeZone zone)
Converts this LocalDate to a full datetime using the specified time zone setting the date fields from this instance and the time fields from the current time.
DateTime
toDateTimeAtMidnight()
Deprecated. Use toDateTimeAtStartOfDay() which won't throw an exception
DateTime
toDateTimeAtMidnight(DateTimeZone zone)
Deprecated. Use toDateTimeAtStartOfDay(DateTimeZone) which won't throw an exception
DateTime
toDateTimeAtStartOfDay()
Converts this LocalDate to a full datetime at the earliest valid time for the date using the default time zone.
DateTime
toDateTimeAtStartOfDay(DateTimeZone zone)
Converts this LocalDate to a full datetime at the earliest valid time for the date using the specified time zone.
Interval
toInterval()
Converts this object to an Interval representing the whole day in the default time zone.
Interval
toInterval(DateTimeZone zone)
Converts this object to an Interval representing the whole day.
LocalDateTime
toLocalDateTime(LocalTime time)
Converts this object to a LocalDateTime using a LocalTime to fill in the missing fields.
String
toString()
Output the date time in ISO8601 format (yyyy-MM-dd).
String
toString(String pattern)
Output the date using the specified format pattern.
String
toString(String pattern, Locale locale)
Output the date using the specified format pattern.
LocalDate.Property
weekOfWeekyear()
Get the week of a week based year property which provides access to advanced functionality.
LocalDate.Property
weekyear()
Get the weekyear property which provides access to advanced functionality.
LocalDate
withCenturyOfEra(int centuryOfEra)
Returns a copy of this date with the century of era field updated.
LocalDate
withDayOfMonth(int dayOfMonth)
Returns a copy of this date with the day of month field updated.
LocalDate
withDayOfWeek(int dayOfWeek)
Returns a copy of this date with the day of week field updated.
LocalDate
withDayOfYear(int dayOfYear)
Returns a copy of this date with the day of year field updated.
LocalDate
withEra(int era)
Returns a copy of this date with the era field updated.
LocalDate
withField(DateTimeFieldType fieldType, int value)
Returns a copy of this date with the specified field set to a new value.
LocalDate
withFieldAdded(DurationFieldType fieldType, int amount)
Returns a copy of this date with the value of the specified field increased.
LocalDate
withFields(ReadablePartial partial)
Returns a copy of this date with the partial set of fields replacing those from this instance.
LocalDate
withMonthOfYear(int monthOfYear)
Returns a copy of this date with the month of year field updated.
LocalDate
withPeriodAdded(ReadablePeriod period, int scalar)
Returns a copy of this date with the specified period added.
LocalDate
withWeekOfWeekyear(int weekOfWeekyear)
Returns a copy of this date with the week of weekyear field updated.
LocalDate
withWeekyear(int weekyear)
Returns a copy of this date with the weekyear field updated.
LocalDate
withYear(int year)
Returns a copy of this date with the year field updated.
LocalDate
withYearOfCentury(int yearOfCentury)
Returns a copy of this date with the year of century field updated.
LocalDate
withYearOfEra(int yearOfEra)
Returns a copy of this date with the year of era field updated.
LocalDate.Property
year()
Get the year property which provides access to advanced functionality.
LocalDate.Property
yearOfCentury()
Get the year of century property which provides access to advanced functionality.
LocalDate.Property
yearOfEra()
Get the year of era property which provides access to advanced functionality.

Methods inherited from class org.joda.time.base.BaseLocal

getLocalMillis

Methods inherited from class org.joda.time.base.AbstractPartial

compareTo, equals, get, getField, getField, getFieldType, getFieldTypes, getFields, getValues, hashCode, indexOf, indexOf, indexOfSupported, indexOfSupported, isAfter, isBefore, isEqual, isSupported, toDateTime, toString

Constructor Details

LocalDate

public LocalDate()
Constructs an instance set to the current local time evaluated using ISO chronology in the default zone.

Once the constructor is completed, the zone is no longer used.


LocalDate

public LocalDate(Object instant)
Parameters:
instant - the datetime object

LocalDate

public LocalDate(Object instant,
                 Chronology chronology)
Constructs an instance from an Object that represents a datetime, using the specified chronology.

If the chronology is null, ISO in the default time zone is used. Once the constructor is completed, the zone is no longer used.

The recognised object types are defined in ConverterManager and include ReadablePartial, ReadableInstant, String, Calendar and Date. The String formats are described by ISODateTimeFormat.localDateParser(). The default String converter ignores the zone and only parses the field values.

Parameters:
instant - the datetime object
chronology - the chronology

LocalDate

public LocalDate(Object instant,
                 DateTimeZone zone)
Constructs an instance from an Object that represents a datetime, forcing the time zone to that specified.

If the object contains no chronology, ISOChronology is used. If the specified time zone is null, the default zone is used. Once the constructor is completed, the zone is no longer used.

The recognised object types are defined in ConverterManager and include ReadablePartial, ReadableInstant, String, Calendar and Date. The String formats are described by ISODateTimeFormat.localDateParser(). The default String converter ignores the zone and only parses the field values.

Parameters:
instant - the datetime object
zone - the time zone

LocalDate

public LocalDate(int year,
                 int monthOfYear,
                 int dayOfMonth)
Constructs an instance set to the specified date and time using ISOChronology.
Parameters:
year - the year
monthOfYear - the month of the year
dayOfMonth - the day of the month

LocalDate

public LocalDate(int year,
                 int monthOfYear,
                 int dayOfMonth,
                 Chronology chronology)
Constructs an instance set to the specified date and time using the specified chronology, whose zone is ignored.

If the chronology is null, ISOChronology is used.

Parameters:
year - the year
monthOfYear - the month of the year
dayOfMonth - the day of the month
chronology - the chronology, null means ISOChronology in default zone

LocalDate

public LocalDate(long instant)
Constructs an instance set to the local time defined by the specified instant evaluated using ISO chronology in the default zone.

Once the constructor is completed, the zone is no longer used.

Parameters:
instant - the milliseconds from 1970-01-01T00:00:00Z

LocalDate

public LocalDate(long instant,
                 Chronology chronology)
Constructs an instance set to the local time defined by the specified instant evaluated using the specified chronology.

If the chronology is null, ISO chronology in the default zone is used. Once the constructor is completed, the zone is no longer used.

Parameters:
instant - the milliseconds from 1970-01-01T00:00:00Z
chronology - the chronology, null means ISOChronology in default zone

LocalDate

public LocalDate(long instant,
                 DateTimeZone zone)
Constructs an instance set to the local time defined by the specified instant evaluated using ISO chronology in the specified zone.

If the specified time zone is null, the default zone is used. Once the constructor is completed, the zone is no longer used.

Parameters:
instant - the milliseconds from 1970-01-01T00:00:00Z
zone - the time zone, null means default zone

LocalDate

public LocalDate(Chronology chronology)
Constructs an instance set to the current local time evaluated using specified chronology.

If the chronology is null, ISO chronology in the default time zone is used. Once the constructor is completed, the zone is no longer used.

Parameters:
chronology - the chronology, null means ISOChronology in default zone

LocalDate

public LocalDate(DateTimeZone zone)
Constructs an instance set to the current local time evaluated using ISO chronology in the specified zone.

If the specified time zone is null, the default zone is used. Once the constructor is completed, the zone is no longer used.

Parameters:
zone - the time zone, null means default zone

Method Details

centuryOfEra

public LocalDate.Property centuryOfEra()
Get the century of era property which provides access to advanced functionality.
Returns:
the year of era property

compareTo

public int compareTo(Object partial)
Compares this partial with another returning an integer indicating the order.

The fields are compared in order, from largest to smallest. The first field that is non-equal is used to determine the result.

The specified object must be a partial instance whose field types match those of this partial.

NOTE: This implementation violates the Comparable contract. This method will accept any instance of ReadablePartial as input. However, it is possible that some implementations of ReadablePartial exist that do not extend AbstractPartial, and thus will throw a ClassCastException if compared in the opposite direction. The cause of this problem is that ReadablePartial doesn't define the compareTo() method, however we can't change that until v2.0.

Overrides:
compareTo in interface AbstractPartial
Parameters:
partial - an object to check against
Returns:
negative if this is less, zero if equal, positive if greater

dayOfMonth

public LocalDate.Property dayOfMonth()
Get the day of month property which provides access to advanced functionality.
Returns:
the day of month property

dayOfWeek

public LocalDate.Property dayOfWeek()
Get the day of week property which provides access to advanced functionality.
Returns:
the day of week property

dayOfYear

public LocalDate.Property dayOfYear()
Get the day of year property which provides access to advanced functionality.
Returns:
the day of year property

equals

public boolean equals(Object partial)
Compares this ReadablePartial with another returning true if the chronology, field types and values are equal.
Specified by:
equals in interface ReadablePartial
Overrides:
equals in interface AbstractPartial
Parameters:
partial - an object to check against
Returns:
true if fields and values are equal

era

public LocalDate.Property era()
Get the era property which provides access to advanced functionality.
Returns:
the era property

fromCalendarFields

public static LocalDate fromCalendarFields(Calendar calendar)
Constructs a LocalDate from a java.util.Calendar using exactly the same field values avoiding any time zone effects.

Each field is queried from the Calendar and assigned to the LocalDate. This is useful if you have been using the Calendar as a local date, ignoing the zone.

This factory method ignores the type of the calendar and always creates a LocalDate with ISO chronology. It is expected that you will only pass in instances of GregorianCalendar however this is not validated.

Parameters:
calendar - the Calendar to extract fields from
Returns:
the created LocalDate

fromDateFields

public static LocalDate fromDateFields(Date date)
Constructs a LocalDate from a java.util.Date using exactly the same field values avoiding any time zone effects.

Each field is queried from the Date and assigned to the LocalDate. This is useful if you have been using the Date as a local date, ignoing the zone.

This factory method always creates a LocalDate with ISO chronology.

Parameters:
date - the Date to extract fields from
Returns:
the created LocalDate

get

public int get(DateTimeFieldType fieldType)
Get the value of one of the fields of a datetime.

This method gets the value of the specified field. For example:

 LocalDate dt = LocalDate.nowDefaultZone();
 int year = dt.get(DateTimeFieldType.year());
 
Specified by:
get in interface ReadablePartial
Overrides:
get in interface AbstractPartial
Parameters:
fieldType - a field type, usually obtained from DateTimeFieldType, not null
Returns:
the value of that field

getCenturyOfEra

public int getCenturyOfEra()
Get the year of era field value.
Returns:
the year of era

getChronology

public Chronology getChronology()
Gets the chronology of the date.
Specified by:
getChronology in interface ReadablePartial
Returns:
the Chronology that the date is using

getDayOfMonth

public int getDayOfMonth()
Returns:
the day of month

getDayOfWeek

public int getDayOfWeek()
Returns:
the day of week

getDayOfYear

public int getDayOfYear()
Get the day of year field value.
Returns:
the day of year

getEra

public int getEra()
Get the era field value.
Returns:
the era

getField

protected DateTimeField getField(int index,
                                 Chronology chrono)
Gets the field for a specific index in the chronology specified.

This method must not use any instance variables.

Overrides:
getField in interface AbstractPartial
Parameters:
index - the index to retrieve
chrono - the chronology to use
Returns:
the field

getLocalMillis

protected long getLocalMillis()
Gets the local milliseconds from the Java epoch of 1970-01-01T00:00:00 (not fixed to any specific time zone).
Overrides:
getLocalMillis in interface BaseLocal
Returns:
the number of milliseconds since 1970-01-01T00:00:00
Since:
1.5 (previously private)

getMonthOfYear

public int getMonthOfYear()
Get the month of year field value.
Returns:
the month of year

getValue

public int getValue(int index)
Gets the value of the field at the specifed index.

This method is required to support the ReadablePartial interface. The supported fields are Year, MonthOfYear and DayOfMonth. Note that all fields from day and above may in fact be queried via other methods.

Specified by:
getValue in interface ReadablePartial
Parameters:
index - the index, zero to two
Returns:
the value

getWeekOfWeekyear

public int getWeekOfWeekyear()
Get the week of weekyear field value.
Returns:
the week of a week based year

getWeekyear

public int getWeekyear()
Get the weekyear field value.

The weekyear is the year that matches with the weekOfWeekyear field. In the standard ISO8601 week algorithm, the first week of the year is that in which at least 4 days are in the year. As a result of this definition, day 1 of the first week may be in the previous year. The weekyear allows you to query the effective year for that day.

Returns:
the weekyear

getYear

public int getYear()
Get the year field value.
Returns:
the year

getYearOfCentury

public int getYearOfCentury()
Get the year of century field value.
Returns:
the year of century

getYearOfEra

public int getYearOfEra()
Get the year of era field value.
Returns:
the year of era

isSupported

public boolean isSupported(DateTimeFieldType type)
Checks if the field type specified is supported by this local date and chronology. This can be used to avoid exceptions in get(DateTimeFieldType).
Specified by:
isSupported in interface ReadablePartial
Overrides:
isSupported in interface AbstractPartial
Parameters:
type - a field type, usually obtained from DateTimeFieldType
Returns:
true if the field type is supported

isSupported

public boolean isSupported(DurationFieldType type)
Checks if the duration type specified is supported by this local date and chronology.
Parameters:
type - a duration type, usually obtained from DurationFieldType
Returns:
true if the field type is supported

minus

public LocalDate minus(ReadablePeriod period)
Returns a copy of this date with the specified period taken away.

If the amount is zero or null, then this is returned.

This method is typically used to subtract complex period instances. Subtracting one field is best achieved using methods like minusYears(int).

Unsupported time fields are ignored, thus subtracting a period of 24 hours will not have any effect.

Parameters:
period - the period to reduce this instant by
Returns:
a copy of this LocalDate with the period taken away

minusDays

public LocalDate minusDays(int days)
Returns a copy of this date minus the specified number of days.

This LocalDate instance is immutable and unaffected by this method call.

The following three lines are identical in effect:

 LocalDate subtracted = dt.minusDays(6);
 LocalDate subtracted = dt.minus(Period.days(6));
 LocalDate subtracted = dt.withFieldAdded(DurationFieldType.days(), -6);
 
Parameters:
days - the amount of days to subtract, may be negative
Returns:
the new LocalDate minus the increased days

minusMonths

public LocalDate minusMonths(int months)
Returns a copy of this date minus the specified number of months.

This LocalDate instance is immutable and unaffected by this method call.

The following three lines are identical in effect:

 LocalDate subtracted = dt.minusMonths(6);
 LocalDate subtracted = dt.minus(Period.months(6));
 LocalDate subtracted = dt.withFieldAdded(DurationFieldType.months(), -6);
 
Parameters:
months - the amount of months to subtract, may be negative
Returns:
the new LocalDate minus the increased months

minusWeeks

public LocalDate minusWeeks(int weeks)
Returns a copy of this date minus the specified number of weeks.

This LocalDate instance is immutable and unaffected by this method call.

The following three lines are identical in effect:

 LocalDate subtracted = dt.minusWeeks(6);
 LocalDate subtracted = dt.minus(Period.weeks(6));
 LocalDate subtracted = dt.withFieldAdded(DurationFieldType.weeks(), -6);
 
Parameters:
weeks - the amount of weeks to subtract, may be negative
Returns:
the new LocalDate minus the increased weeks

minusYears

public LocalDate minusYears(int years)
Returns a copy of this date minus the specified number of years.

This LocalDate instance is immutable and unaffected by this method call.

The following three lines are identical in effect:

 LocalDate subtracted = dt.minusYears(6);
 LocalDate subtracted = dt.minus(Period.years(6));
 LocalDate subtracted = dt.withFieldAdded(DurationFieldType.years(), -6);
 
Parameters:
years - the amount of years to subtract, may be negative
Returns:
the new LocalDate minus the increased years

monthOfYear

public LocalDate.Property monthOfYear()
Get the month of year property which provides access to advanced functionality.
Returns:
the month of year property

plus

public LocalDate plus(ReadablePeriod period)
Returns a copy of this date with the specified period added.

If the amount is zero or null, then this is returned.

This method is typically used to add complex period instances. Adding one field is best achieved using methods like plusYears(int).

Unsupported time fields are ignored, thus adding a period of 24 hours will not have any effect.

Parameters:
period - the period to add to this one, null means zero
Returns:
a copy of this date with the period added

plusDays

public LocalDate plusDays(int days)
Returns a copy of this date plus the specified number of days.

This LocalDate instance is immutable and unaffected by this method call.

The following three lines are identical in effect:

 LocalDate added = dt.plusDays(6);
 LocalDate added = dt.plus(Period.days(6));
 LocalDate added = dt.withFieldAdded(DurationFieldType.days(), 6);
 
Parameters:
days - the amount of days to add, may be negative
Returns:
the new LocalDate plus the increased days

plusMonths

public LocalDate plusMonths(int months)
Returns a copy of this date plus the specified number of months.

This LocalDate instance is immutable and unaffected by this method call.

The following three lines are identical in effect:

 LocalDate added = dt.plusMonths(6);
 LocalDate added = dt.plus(Period.months(6));
 LocalDate added = dt.withFieldAdded(DurationFieldType.months(), 6);
 
Parameters:
months - the amount of months to add, may be negative
Returns:
the new LocalDate plus the increased months

plusWeeks

public LocalDate plusWeeks(int weeks)
Returns a copy of this date plus the specified number of weeks.

This LocalDate instance is immutable and unaffected by this method call.

The following three lines are identical in effect:

 LocalDate added = dt.plusWeeks(6);
 LocalDate added = dt.plus(Period.weeks(6));
 LocalDate added = dt.withFieldAdded(DurationFieldType.weeks(), 6);
 
Parameters:
weeks - the amount of weeks to add, may be negative
Returns:
the new LocalDate plus the increased weeks

plusYears

public LocalDate plusYears(int years)
Returns a copy of this date plus the specified number of years.

This LocalDate instance is immutable and unaffected by this method call.

The following three lines are identical in effect:

 LocalDate added = dt.plusYears(6);
 LocalDate added = dt.plus(Period.years(6));
 LocalDate added = dt.withFieldAdded(DurationFieldType.years(), 6);
 
Parameters:
years - the amount of years to add, may be negative
Returns:
the new LocalDate plus the increased years

property

public LocalDate.Property property(DateTimeFieldType fieldType)
Gets the property object for the specified type, which contains many useful methods.
Parameters:
fieldType - the field type to get the chronology for
Returns:
the property object

size

public int size()
Gets the number of fields in this partial, which is three. The supported fields are Year, MonthOfYear and DayOfMonth. Note that all fields from day and above may in fact be queried via other methods.
Specified by:
size in interface ReadablePartial
Returns:
the field count, three

toDateMidnight

public DateMidnight toDateMidnight()
Converts this LocalDate to a DateMidnight in the default time zone.

As from v1.5, you are recommended to avoid DateMidnight and use toDateTimeAtStartOfDay() instead because of the exception detailed below.

This method will throw an exception if the default time zone switches to Daylight Savings Time at midnight and this LocalDate represents that switchover date. The problem is that there is no such time as midnight on the required date, and as such an exception is thrown.

This instance is immutable and unaffected by this method call.

Returns:
the DateMidnight instance in the default zone

toDateMidnight

public DateMidnight toDateMidnight(DateTimeZone zone)
Converts this LocalDate to a DateMidnight.

As from v1.5, you are recommended to avoid DateMidnight and use toDateTimeAtStartOfDay() instead because of the exception detailed below.

This method will throw an exception if the time zone switches to Daylight Savings Time at midnight and this LocalDate represents that switchover date. The problem is that there is no such time as midnight on the required date, and as such an exception is thrown.

This instance is immutable and unaffected by this method call.

Parameters:
zone - the zone to get the DateMidnight in, null means default zone
Returns:
the DateMidnight instance

toDateTime

public DateTime toDateTime(LocalTime time)
Converts this object to a DateTime using a LocalTime to fill in the missing fields and using the default time zone.

The resulting chronology is determined by the chronology of this LocalDate. The chronology of the time must match. If the time is null, the current time in the date's chronology is used.

This method will throw an exception if the datetime that would be created does not exist when the time zone is taken into account.

This instance is immutable and unaffected by this method call.

Parameters:
time - the time of day to use, null means current time
Returns:
the DateTime instance

toDateTime

public DateTime toDateTime(LocalTime time,
                           DateTimeZone zone)
Converts this object to a DateTime using a LocalTime to fill in the missing fields.

The resulting chronology is determined by the chronology of this LocalDate plus the time zone. The chronology of the time must match. If the time is null, the current time in the date's chronology is used.

This method will throw an exception if the datetime that would be created does not exist when the time zone is taken into account.

This instance is immutable and unaffected by this method call.

Parameters:
time - the time of day to use, null means current time
zone - the zone to get the DateTime in, null means default
Returns:
the DateTime instance

toDateTimeAtCurrentTime

public DateTime toDateTimeAtCurrentTime()
Converts this LocalDate to a full datetime using the default time zone setting the date fields from this instance and the time fields from the current time.

This method will throw an exception if the datetime that would be created does not exist when the time zone is taken into account.

This instance is immutable and unaffected by this method call.

Returns:
this date as a datetime with the time as the current time

toDateTimeAtCurrentTime

public DateTime toDateTimeAtCurrentTime(DateTimeZone zone)
Converts this LocalDate to a full datetime using the specified time zone setting the date fields from this instance and the time fields from the current time.

This method uses the chronology from this instance plus the time zone specified.

This method will throw an exception if the datetime that would be created does not exist when the time zone is taken into account.

This instance is immutable and unaffected by this method call.

Parameters:
zone - the zone to use, null means default zone
Returns:
this date as a datetime with the time as the current time

toDateTimeAtMidnight

public DateTime toDateTimeAtMidnight()

Deprecated. Use toDateTimeAtStartOfDay() which won't throw an exception

Converts this LocalDate to a full datetime at midnight using the default time zone.

This method will throw an exception if the default time zone switches to Daylight Savings Time at midnight and this LocalDate represents that switchover date. The problem is that there is no such time as midnight on the required date, and as such an exception is thrown.

This instance is immutable and unaffected by this method call.

Returns:
this date as a datetime at midnight

toDateTimeAtMidnight

public DateTime toDateTimeAtMidnight(DateTimeZone zone)

Deprecated. Use toDateTimeAtStartOfDay(DateTimeZone) which won't throw an exception

Converts this LocalDate to a full datetime at midnight using the specified time zone.

This method will throw an exception if the time zone switches to Daylight Savings Time at midnight and this LocalDate represents that switchover date. The problem is that there is no such time as midnight on the required date, and as such an exception is thrown.

This method uses the chronology from this instance plus the time zone specified.

This instance is immutable and unaffected by this method call.

Parameters:
zone - the zone to use, null means default zone
Returns:
this date as a datetime at midnight

toDateTimeAtStartOfDay

public DateTime toDateTimeAtStartOfDay()
Converts this LocalDate to a full datetime at the earliest valid time for the date using the default time zone.

The time will normally be midnight, as that is the earliest time on any given day. However, in some time zones when Daylight Savings Time starts, there is no midnight because time jumps from 11:59 to 01:00. This method handles that situation by returning 01:00 on that date.

This instance is immutable and unaffected by this method call.

Returns:
this date as a datetime at the start of the day
Since:
1.5

toDateTimeAtStartOfDay

public DateTime toDateTimeAtStartOfDay(DateTimeZone zone)
Converts this LocalDate to a full datetime at the earliest valid time for the date using the specified time zone.

The time will normally be midnight, as that is the earliest time on any given day. However, in some time zones when Daylight Savings Time starts, there is no midnight because time jumps from 11:59 to 01:00. This method handles that situation by returning 01:00 on that date.

This method uses the chronology from this instance plus the time zone specified.

This instance is immutable and unaffected by this method call.

Parameters:
zone - the zone to use, null means default zone
Returns:
this date as a datetime at the start of the day
Since:
1.5

toInterval

public Interval toInterval()
Converts this object to an Interval representing the whole day in the default time zone.

This instance is immutable and unaffected by this method call.

Returns:
a interval over the day

toInterval

public Interval toInterval(DateTimeZone zone)
Converts this object to an Interval representing the whole day.

This instance is immutable and unaffected by this method call.

Parameters:
zone - the zone to get the Interval in, null means default
Returns:
a interval over the day

toLocalDateTime

public LocalDateTime toLocalDateTime(LocalTime time)
Converts this object to a LocalDateTime using a LocalTime to fill in the missing fields.

The resulting chronology is determined by the chronology of this LocalDate. The chronology of the time must also match. If the time is null an exception is thrown.

This instance is immutable and unaffected by this method call.

Parameters:
time - the time of day to use, must not be null
Returns:
the LocalDateTime instance
Since:
1.5

toString

public String toString()
Output the date time in ISO8601 format (yyyy-MM-dd).
Specified by:
toString in interface ReadablePartial
Returns:
ISO8601 time formatted string.

toString

public String toString(String pattern)
Output the date using the specified format pattern.
Parameters:
pattern - the pattern specification, null means use toString

toString

public String toString(String pattern,
                       Locale locale)
            throws IllegalArgumentException
Output the date using the specified format pattern.
Parameters:
pattern - the pattern specification, null means use toString
locale - Locale to use, null means default

weekOfWeekyear

public LocalDate.Property weekOfWeekyear()
Get the week of a week based year property which provides access to advanced functionality.
Returns:
the week of a week based year property

weekyear

public LocalDate.Property weekyear()
Get the weekyear property which provides access to advanced functionality.
Returns:
the weekyear property

withCenturyOfEra

public LocalDate withCenturyOfEra(int centuryOfEra)
Returns a copy of this date with the century of era field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of century of era changed.

Parameters:
centuryOfEra - the centurey of era to set
Returns:
a copy of this object with the field set

withDayOfMonth

public LocalDate withDayOfMonth(int dayOfMonth)
Returns a copy of this date with the day of month field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of day of month changed.

Parameters:
dayOfMonth - the day of month to set
Returns:
a copy of this object with the field set

withDayOfWeek

public LocalDate withDayOfWeek(int dayOfWeek)
Returns a copy of this date with the day of week field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of day of week changed.

Parameters:
dayOfWeek - the day of week to set
Returns:
a copy of this object with the field set

withDayOfYear

public LocalDate withDayOfYear(int dayOfYear)
Returns a copy of this date with the day of year field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of day of year changed.

Parameters:
dayOfYear - the day of year to set
Returns:
a copy of this object with the field set

withEra

public LocalDate withEra(int era)
Returns a copy of this date with the era field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of era changed.

Parameters:
era - the era to set
Returns:
a copy of this object with the field set

withField

public LocalDate withField(DateTimeFieldType fieldType,
                           int value)
Returns a copy of this date with the specified field set to a new value.

For example, if the field type is monthOfYear then the month of year field will be changed in the returned instance. If the field type is null, then this is returned.

These two lines are equivalent:

 LocalDate updated = dt.withDayOfMonth(6);
 LocalDate updated = dt.withField(DateTimeFieldType.dayOfMonth(), 6);
 
Parameters:
fieldType - the field type to set, not null
value - the value to set
Returns:
a copy of this date with the field set

withFieldAdded

public LocalDate withFieldAdded(DurationFieldType fieldType,
                                int amount)
Returns a copy of this date with the value of the specified field increased.

If the addition is zero or the field is null, then this is returned.

These three lines are equivalent:

 LocalDate added = dt.withFieldAdded(DurationFieldType.years(), 6);
 LocalDate added = dt.plusYears(6);
 LocalDate added = dt.plus(Period.years(6));
 
Parameters:
fieldType - the field type to add to, not null
amount - the amount to add
Returns:
a copy of this date with the field updated

withFields

public LocalDate withFields(ReadablePartial partial)
Returns a copy of this date with the partial set of fields replacing those from this instance.

For example, if the partial contains a year and a month then those two fields will be changed in the returned instance. Unsupported fields are ignored. If the partial is null, then this is returned.

Parameters:
partial - the partial set of fields to apply to this date, null ignored
Returns:
a copy of this date with a different set of fields

withMonthOfYear

public LocalDate withMonthOfYear(int monthOfYear)
Returns a copy of this date with the month of year field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of month of year changed.

Parameters:
monthOfYear - the month of year to set
Returns:
a copy of this object with the field set

withPeriodAdded

public LocalDate withPeriodAdded(ReadablePeriod period,
                                 int scalar)
Returns a copy of this date with the specified period added.

If the addition is zero, then this is returned.

This method is typically used to add multiple copies of complex period instances. Adding one field is best achieved using methods like withFieldAdded(DurationFieldType,int) or plusYears(int).

Unsupported time fields are ignored, thus adding a period of 24 hours will not have any effect.

Parameters:
period - the period to add to this one, null means zero
scalar - the amount of times to add, such as -1 to subtract once
Returns:
a copy of this date with the period added

withWeekOfWeekyear

public LocalDate withWeekOfWeekyear(int weekOfWeekyear)
Returns a copy of this date with the week of weekyear field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of week of weekyear changed.

Parameters:
weekOfWeekyear - the week of weekyear to set
Returns:
a copy of this object with the field set

withWeekyear

public LocalDate withWeekyear(int weekyear)
Returns a copy of this date with the weekyear field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of weekyear changed.

Parameters:
weekyear - the weekyear to set
Returns:
a copy of this object with the field set

withYear

public LocalDate withYear(int year)
Returns a copy of this date with the year field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of year changed.

Parameters:
year - the year to set
Returns:
a copy of this object with the field set

withYearOfCentury

public LocalDate withYearOfCentury(int yearOfCentury)
Returns a copy of this date with the year of century field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of year of century changed.

Parameters:
yearOfCentury - the year of century to set
Returns:
a copy of this object with the field set

withYearOfEra

public LocalDate withYearOfEra(int yearOfEra)
Returns a copy of this date with the year of era field updated.

LocalDate is immutable, so there are no set methods. Instead, this method returns a new instance with the value of year of era changed.

Parameters:
yearOfEra - the year of era to set
Returns:
a copy of this object with the field set

year

public LocalDate.Property year()
Get the year property which provides access to advanced functionality.
Returns:
the year property

yearOfCentury

public LocalDate.Property yearOfCentury()
Get the year of century property which provides access to advanced functionality.
Returns:
the year of era property

yearOfEra

public LocalDate.Property yearOfEra()
Get the year of era property which provides access to advanced functionality.
Returns:
the year of era property

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