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link管理  ›  LocalDate (Joda-Time 2.12.5 API)
date
https://www.joda.org/joda-time/apidocs/org/joda/time/LocalDate.html
淡定的鸭蛋
1 年前
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:

  • getMonthOfYear()
  • monthOfYear().get() The second technique also provides access to other useful methods on the field:
  • numeric value
  • text value
  • short text value
  • maximum/minimum values
  • add/subtract
  • rounding LocalDate is thread-safe and immutable, provided that the Chronology is as well. All standard Chronology classes supplied are thread-safe and immutable.

    • Since:
    See Also:
    Serialized Form
    static class LocalDate.Property
    LocalDate.Property binds a LocalDate to a DateTimeField allowing powerful datetime functionality to be easily accessed.
    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.
    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 ( 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.

    Method Summary

    All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method and Description LocalDate.Property centuryOfEra ()
    Get the century of era property which provides access to advanced functionality.
    compareTo ( ReadablePartial 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.
    static LocalDate fromDateFields ( Date date)
    Constructs a LocalDate from a java.util.Date using exactly the same field values.
    get ( DateTimeFieldType fieldType)
    Get the value of one of the fields of a datetime.
    getCenturyOfEra ()
    Get the year of era field value.
    Chronology getChronology ()
    Gets the chronology of the date.
    getDayOfMonth ()
    Get the day of month field value.
    getDayOfWeek ()
    Get the day of week field value.
    getDayOfYear ()
    Get the day of year field value.
    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).
    getMonthOfYear ()
    Get the month of year field value.
    getValue (int index)
    Gets the value of the field at the specified index.
    getWeekOfWeekyear ()
    Get the week of weekyear field value.
    getWeekyear ()
    Get the weekyear field value.
    getYear ()
    Get the year field value.
    getYearOfCentury ()
    Get the year of century field value.
    getYearOfEra ()
    Get the year of era field value.
    hashCode ()
    Gets a hash code for the instant as defined in ReadablePartial .
    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.
    static LocalDate now ()
    Obtains a LocalDate set to the current system millisecond time using ISOChronology in the default time zone.
    static LocalDate now ( Chronology chronology)
    Obtains a LocalDate set to the current system millisecond time using the specified chronology.
    static LocalDate now ( DateTimeZone zone)
    Obtains a LocalDate set to the current system millisecond time using ISOChronology in the specified time zone.
    static LocalDate parse ( String str)
    Parses a LocalDate from the specified string.
    static LocalDate parse ( String str, DateTimeFormatter formatter)
    Parses a LocalDate from the specified string using a formatter.
    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.
    size ()
    Gets the number of fields in this partial, which is three.
    toDate ()
    Get the date time as a java.util.Date .
    DateMidnight toDateMidnight ()
    Deprecated.
    DateMidnight is deprecated
    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 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.

    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.

    See Also:
    now()

    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
    See Also:
    now(DateTimeZone)

    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
    See Also:
    now(Chronology)

    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 
    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 
    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(Object instant)
    Constructs an instance from an Object that represents a datetime. The time zone will be retrieved from the object if possible, otherwise the default time zone will be used. If the object contains no chronology, ISOChronology 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
    Throws:
    IllegalArgumentException - if the instant is invalid 
    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
    Throws:
    IllegalArgumentException - if the instant is invalid 
    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. If the instant contains a chronology, it will be ignored. For example, passing a LocalDate and a different chronology will return a date with the year/month/day from the date applied unaltered to the specified chronology. 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
    Throws:
    IllegalArgumentException - if the instant is invalid
    int dayOfMonth)
    Constructs an instance set to the specified date and time using ISOChronology .
    Parameters:
    year - the year
    monthOfYear - the month of the year, from 1 to 12
    dayOfMonth - the day of the month, from 1 to 31
    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, valid values defined by the chronology
    monthOfYear - the month of the year, valid values defined by the chronology
    dayOfMonth - the day of the month, valid values defined by the chronology
    chronology - the chronology, null means ISOChronology in default zone 
    public static LocalDate now()
    Obtains a LocalDate set to the current system millisecond time using ISOChronology in the default time zone.
    Returns:
    the current date-time, not null
    Since: 
    public static LocalDate now(DateTimeZone zone)
    Obtains a LocalDate set to the current system millisecond time using ISOChronology in the specified time zone.
    Parameters:
    zone - the time zone, not null
    Returns:
    the current date-time, not null
    Since: 
    public static LocalDate now(Chronology chronology)
    Obtains a LocalDate set to the current system millisecond time using the specified chronology.
    Parameters:
    chronology - the chronology, not null
    Returns:
    the current date-time, not null
    Since:

    parse 

    public static LocalDate parse(String str)
    Parses a LocalDate from the specified string. This uses ISODateTimeFormat.localDateParser() .

    Parameters:
    str - the string to parse, not null
    Returns:
    the parsed date, not null
    Since: 
    public static LocalDate parse(String str,
                              DateTimeFormatter formatter)
    Parses a LocalDate from the specified string using a formatter.
    Parameters:
    str - the string to parse, not null
    formatter - the formatter to use, not null
    Returns:
    the parsed date, not null
    Since:

    fromCalendarFields 

    public static LocalDate fromCalendarFields(Calendar calendar)
    Constructs a LocalDate from a java.util.Calendar using exactly the same field values. 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, ignoring the zone. One advantage of this method is that this method is unaffected if the version of the time zone data differs between the JDK and Joda-Time. That is because the local field values are transferred, calculated using the JDK time zone data and without using the Joda-Time time zone data. 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, not null
    Returns:
    the created local date, not null
    Throws:
    IllegalArgumentException - if the calendar is null
    IllegalArgumentException - if the date is invalid for the ISO chronology

    fromDateFields 

    public static LocalDate fromDateFields(Date date)
    Constructs a LocalDate from a java.util.Date using exactly the same field values. 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, ignoring the zone. One advantage of this method is that this method is unaffected if the version of the time zone data differs between the JDK and Joda-Time. That is because the local field values are transferred, calculated using the JDK time zone data and without using the Joda-Time time zone data. This factory method always creates a LocalDate with ISO chronology.

    Parameters:
    date - the Date to extract fields from, not null
    Returns:
    the created local date, not null
    Throws:
    IllegalArgumentException - if the calendar is null
    IllegalArgumentException - if the date is invalid for the ISO chronology 
    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 
    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.

    Specified by:
    getField in class AbstractPartial
    Parameters:
    index - the index to retrieve
    chrono - the chronology to use
    Returns:
    the field

    getValue 

    public int getValue(int index)
    Gets the value of the field at the specified 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
    Throws:
    IndexOutOfBoundsException - if the index is invalid 
    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 class AbstractPartial
    Parameters:
    fieldType - a field type, usually obtained from DateTimeFieldType, not null
    Returns:
    the value of that field
    Throws:
    IllegalArgumentException - if the field type is null or unsupported

    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 class 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

    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).
    Specified by:
    getLocalMillis in class BaseLocal
    Returns:
    the number of milliseconds since 1970-01-01T00:00:00
    Since:
    1.5 (previously private)

    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 class AbstractPartial
    Parameters:
    partial - an object to check against
    Returns:
    true if fields and values are equal

    hashCode 

    public int hashCode()
    Gets a hash code for the instant as defined in ReadablePartial .
    Specified by:
    hashCode in interface ReadablePartial
    Overrides:
    hashCode in class AbstractPartial
    Returns:
    a suitable hash code

    compareTo 

    public int compareTo(ReadablePartial 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.

    Specified by:
    compareTo in interface Comparable < ReadablePartial >
    Overrides:
    compareTo in class AbstractPartial
    Parameters:
    partial - an object to check against
    Returns:
    negative if this is less, zero if equal, positive if greater
    Throws:
    ClassCastException - if the partial is the wrong class or if it has field types that don't match
    NullPointerException - if the partial is null

    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:

    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: 
    @Deprecated
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 

    @Deprecated
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

    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 
    @Deprecated
public DateMidnight toDateMidnight()
    Deprecated. DateMidnight is deprecated
    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 
    @Deprecated
public DateMidnight toDateMidnight(DateTimeZone zone)
    Deprecated. DateMidnight is deprecated
    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

    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
    Throws:
    IllegalArgumentException - if the time is null
    IllegalArgumentException - if the chronology of the time does not match
    Since:

    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, this method delegates to toDateTimeAtCurrentTime(DateTimeZone) and the following documentation does not apply. When the time zone is applied, the local date-time may be affected by daylight saving. In a daylight saving gap, when the local time does not exist, this method will throw an exception. In a daylight saving overlap, when the same local time occurs twice, this method returns the first occurrence of the local time. This instance is immutable and unaffected by this method call.

    Parameters:
    time - the time of day to use, null uses current time
    Returns:
    the DateTime instance
    Throws:
    IllegalArgumentException - if the chronology of the time does not match
    IllegalInstantException - if the local time does not exist when the time zone is applied 
    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, this method delegates to toDateTimeAtCurrentTime(DateTimeZone) and the following documentation does not apply. When the time zone is applied, the local date-time may be affected by daylight saving. In a daylight saving gap, when the local time does not exist, this method will throw an exception. In a daylight saving overlap, when the same local time occurs twice, this method returns the first occurrence of the local time. This instance is immutable and unaffected by this method call.

    Parameters:
    time - the time of day to use, null uses current time
    zone - the zone to get the DateTime in, null means default
    Returns:
    the DateTime instance
    Throws:
    IllegalArgumentException - if the chronology of the time does not match
    IllegalInstantException - if the local time does not exist when the time zone is applied

    toInterval 

    public Interval toInterval()
    Converts this object to an Interval representing the whole day in the default time zone. The interval may have more or less than 24 hours if this is a daylight savings cutover date. 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. The interval may have more or less than 24 hours if this is a daylight savings cutover date. 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
    Get the date time as a java.util.Date . The Date object created has exactly the same year, month and day as this date. The time will be set to the earliest valid time for that date. Converting to a JDK Date is full of complications as the JDK Date constructor doesn't behave as you might expect around DST transitions. This method works by taking a first guess and then adjusting the JDK date until it has the earliest valid instant. This also handles the situation where the JDK time zone data differs from the Joda-Time time zone data.

    Returns:
    a Date initialised with this date, never null
    Since:

    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
    Throws:
    IllegalArgumentException - if any value is invalid 
    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
    Throws:
    IllegalArgumentException - if the field is null or unsupported

    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
    Throws:
    IllegalArgumentException - if the field is null or unsupported
    ArithmeticException - if the result exceeds the internal capacity 
    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
    Throws:
    ArithmeticException - if the result exceeds the internal capacity 
    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
    Throws:
    ArithmeticException - if the result exceeds the internal capacity

    plusYears 

    public LocalDate plusYears(int years)
    Returns a copy of this date plus the specified number of years. This adds the specified number of years to the date. If adding years makes the day-of-month invalid, it is adjusted to the last valid day in the month. 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

    plusMonths 

    public LocalDate plusMonths(int months)
    Returns a copy of this date plus the specified number of months. This adds the specified number of months to the date. The addition may change the year, but the day-of-month is normally unchanged. If adding months makes the day-of-month invalid, it is adjusted to the last valid day in the month. 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

    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

    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
    Throws:
    ArithmeticException - if the result exceeds the internal capacity

    minusYears 

    public LocalDate minusYears(int years)
    Returns a copy of this date minus the specified number of years. This subtracts the specified number of years from the date. If subtracting years makes the day-of-month invalid, it is adjusted to the last valid day in the month. 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

    minusMonths 

    public LocalDate minusMonths(int months)
    Returns a copy of this date minus the specified number of months. This subtracts the specified number of months from the date. The subtraction may change the year, but the day-of-month is normally unchanged. If subtracting months makes the day-of-month invalid, it is adjusted to the last valid day in the month. 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

    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

    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
    Throws:
    IllegalArgumentException - if the field is null or unsupported
    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
    Get the week of weekyear field value. This field is associated with the "weekyear" via getWeekyear() . 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.

    Returns:
    the week of a week based year
    Get the day of month field value. The values for the day of month are defined in DateTimeConstants .

    Returns:
    the day of month
    Get the day of week field value. The values for the day of week are defined in DateTimeConstants .

    Returns:
    the day of week

    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
    Throws:
    IllegalArgumentException - if the value is invalid

    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 century of era to set
    Returns:
    a copy of this object with the field set
    Throws:
    IllegalArgumentException - if the value is invalid

    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
    Throws:
    IllegalArgumentException - if the value is invalid

    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
    Throws:
    IllegalArgumentException - if the value is invalid

    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
    Throws:
    IllegalArgumentException - if the value is invalid

    withWeekyear 

    public LocalDate withWeekyear(int weekyear)
    Returns a copy of this date with the weekyear field updated. 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. 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
    Throws:
    IllegalArgumentException - if the value is invalid

    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
    Throws:
    IllegalArgumentException - if the value is invalid

    withWeekOfWeekyear 

    public LocalDate withWeekOfWeekyear(int weekOfWeekyear)
    Returns a copy of this date with the week of weekyear field updated. This field is associated with the "weekyear" via withWeekyear(int) . 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. 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
    Throws:
    IllegalArgumentException - if the value is invalid

    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
    Throws:
    IllegalArgumentException - if the value is invalid

    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
    Throws:
    IllegalArgumentException - if the value is invalid

    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
    Throws:
    IllegalArgumentException - if the value is invalid 
    public LocalDate.Property era()
    Get the era property which provides access to advanced functionality.
    Returns:
    the era property

    centuryOfEra 

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

    weekyear 

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

    monthOfYear 

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

    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

    dayOfYear 

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

    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

    toString 

    public String toString(String pattern)
    Output the date using the specified format pattern.
    Parameters:
    pattern - the pattern specification, null means use toString
    Returns:
    the formatted output
    See Also:
    DateTimeFormat
    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
    Returns:
    the formatted output
    Throws:
    IllegalArgumentException - if the pattern is invalid
    See Also:
    DateTimeFormat
     
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