Package org.joda.time

Class MutablePeriod

All Implemented Interfaces:
Serializable, Cloneable, ReadablePeriod, ReadWritablePeriod

public class MutablePeriod extends BasePeriod implements ReadWritablePeriod, Cloneable, Serializable
Standard mutable time period implementation.

A time period is divided into a number of fields, such as hours and seconds. Which fields are supported is defined by the PeriodType class. The default is the standard period type, which supports years, months, weeks, days, hours, minutes, seconds and millis.

When this time period is added to an instant, the effect is of adding each field in turn. As a result, this takes into account daylight savings time. Adding a time period of 1 day to the day before daylight savings starts will only add 23 hours rather than 24 to ensure that the time remains the same. If this is not the behaviour you want, then see Duration.

The definition of a period also affects the equals method. A period of 1 day is not equal to a period of 24 hours, nor 1 hour equal to 60 minutes. This is because periods represent an abstracted definition of a time period (eg. a day may not actually be 24 hours, it might be 23 or 25 at daylight savings boundary). To compare the actual duration of two periods, convert both to durations using toDuration, an operation that emphasises that the result may differ according to the date you choose.

MutablePeriod is mutable and not thread-safe, unless concurrent threads are not invoking mutator methods.

Since:
1.0
Author:
Brian S O'Neill, Stephen Colebourne
See Also:
  • Constructor Details

    • MutablePeriod

      public MutablePeriod()
      Creates a zero-length period using the standard period type.
    • MutablePeriod

      public MutablePeriod(PeriodType type)
      Creates a zero-length period using the specified period type.
      Parameters:
      type - which set of fields this period supports
    • MutablePeriod

      public MutablePeriod(int hours, int minutes, int seconds, int millis)
      Create a period from a set of field values using the standard set of fields.
      Parameters:
      hours - amount of hours in this period
      minutes - amount of minutes in this period
      seconds - amount of seconds in this period
      millis - amount of milliseconds in this period
    • MutablePeriod

      public MutablePeriod(int years, int months, int weeks, int days, int hours, int minutes, int seconds, int millis)
      Create a period from a set of field values using the standard set of fields.
      Parameters:
      years - amount of years in this period
      months - amount of months in this period
      weeks - amount of weeks in this period
      days - amount of days in this period
      hours - amount of hours in this period
      minutes - amount of minutes in this period
      seconds - amount of seconds in this period
      millis - amount of milliseconds in this period
    • MutablePeriod

      public MutablePeriod(int years, int months, int weeks, int days, int hours, int minutes, int seconds, int millis, PeriodType type)
      Create a period from a set of field values.
      Parameters:
      years - amount of years in this period, which must be zero if unsupported
      months - amount of months in this period, which must be zero if unsupported
      weeks - amount of weeks in this period, which must be zero if unsupported
      days - amount of days in this period, which must be zero if unsupported
      hours - amount of hours in this period, which must be zero if unsupported
      minutes - amount of minutes in this period, which must be zero if unsupported
      seconds - amount of seconds in this period, which must be zero if unsupported
      millis - amount of milliseconds in this period, which must be zero if unsupported
      type - which set of fields this period supports, null means AllType
      Throws:
      IllegalArgumentException - if an unsupported field's value is non-zero
    • MutablePeriod

      public MutablePeriod(long duration)
      Creates a period from the given millisecond duration using the standard set of fields.

      Only precise fields in the period type will be used. For the standard period type this is the time fields only. Thus the year, month, week and day fields will not be populated.

      If the duration is small, less than one day, then this method will perform as you might expect and split the fields evenly.

      If the duration is larger than one day then all the remaining duration will be stored in the largest available precise field, hours in this case.

      For example, a duration equal to (365 + 60 + 5) days will be converted to ((365 + 60 + 5) * 24) hours by this constructor.

      For more control over the conversion process, you have two options:

      • convert the duration to an Interval, and from there obtain the period
      • specify a period type that contains precise definitions of the day and larger fields, such as the UTC or precise types.
      Parameters:
      duration - the duration, in milliseconds
    • MutablePeriod

      public MutablePeriod(long duration, PeriodType type)
      Creates a period from the given millisecond duration.

      Only precise fields in the period type will be used. Imprecise fields will not be populated.

      If the duration is small then this method will perform as you might expect and split the fields evenly.

      If the duration is large then all the remaining duration will be stored in the largest available precise field. For details as to which fields are precise, review the period type javadoc.

      Parameters:
      duration - the duration, in milliseconds
      type - which set of fields this period supports, null means standard
    • MutablePeriod

      public MutablePeriod(long duration, Chronology chronology)
      Creates a period from the given millisecond duration using the standard set of fields.

      Only precise fields in the period type will be used. Imprecise fields will not be populated.

      If the duration is small then this method will perform as you might expect and split the fields evenly.

      If the duration is large then all the remaining duration will be stored in the largest available precise field. For details as to which fields are precise, review the period type javadoc.

      Parameters:
      duration - the duration, in milliseconds
      chronology - the chronology to use to split the duration, null means ISO default
    • MutablePeriod

      public MutablePeriod(long duration, PeriodType type, Chronology chronology)
      Creates a period from the given millisecond duration.

      Only precise fields in the period type will be used. Imprecise fields will not be populated.

      If the duration is small then this method will perform as you might expect and split the fields evenly.

      If the duration is large then all the remaining duration will be stored in the largest available precise field. For details as to which fields are precise, review the period type javadoc.

      Parameters:
      duration - the duration, in milliseconds
      type - which set of fields this period supports, null means standard
      chronology - the chronology to use to split the duration, null means ISO default
    • MutablePeriod

      public MutablePeriod(long startInstant, long endInstant)
      Creates a period from the given interval endpoints using the standard set of fields.
      Parameters:
      startInstant - interval start, in milliseconds
      endInstant - interval end, in milliseconds
    • MutablePeriod

      public MutablePeriod(long startInstant, long endInstant, PeriodType type)
      Creates a period from the given interval endpoints.
      Parameters:
      startInstant - interval start, in milliseconds
      endInstant - interval end, in milliseconds
      type - which set of fields this period supports, null means standard
    • MutablePeriod

      public MutablePeriod(long startInstant, long endInstant, Chronology chrono)
      Creates a period from the given interval endpoints using the standard set of fields.
      Parameters:
      startInstant - interval start, in milliseconds
      endInstant - interval end, in milliseconds
      chrono - the chronology to use, null means ISO in default zone
    • MutablePeriod

      public MutablePeriod(long startInstant, long endInstant, PeriodType type, Chronology chrono)
      Creates a period from the given interval endpoints.
      Parameters:
      startInstant - interval start, in milliseconds
      endInstant - interval end, in milliseconds
      type - which set of fields this period supports, null means standard
      chrono - the chronology to use, null means ISO in default zone
    • MutablePeriod

      public MutablePeriod(ReadableInstant startInstant, ReadableInstant endInstant)
      Creates a period from the given interval endpoints using the standard set of fields.

      The chronology of the start instant is used, unless that is null when the chronology of the end instant is used instead.

      Parameters:
      startInstant - interval start, null means now
      endInstant - interval end, null means now
    • MutablePeriod

      public MutablePeriod(ReadableInstant startInstant, ReadableInstant endInstant, PeriodType type)
      Creates a period from the given interval endpoints.

      The chronology of the start instant is used, unless that is null when the chronology of the end instant is used instead.

      Parameters:
      startInstant - interval start, null means now
      endInstant - interval end, null means now
      type - which set of fields this period supports, null means AllType
    • MutablePeriod

      public MutablePeriod(ReadableInstant startInstant, ReadableDuration duration)
      Creates a period from the given start point and the duration.
      Parameters:
      startInstant - the interval start, null means now
      duration - the duration of the interval, null means zero-length
    • MutablePeriod

      public MutablePeriod(ReadableInstant startInstant, ReadableDuration duration, PeriodType type)
      Creates a period from the given start point and the duration.
      Parameters:
      startInstant - the interval start, null means now
      duration - the duration of the interval, null means zero-length
      type - which set of fields this period supports, null means standard
    • MutablePeriod

      public MutablePeriod(ReadableDuration duration, ReadableInstant endInstant)
      Creates a period from the given duration and end point.
      Parameters:
      duration - the duration of the interval, null means zero-length
      endInstant - the interval end, null means now
    • MutablePeriod

      public MutablePeriod(ReadableDuration duration, ReadableInstant endInstant, PeriodType type)
      Creates a period from the given duration and end point.
      Parameters:
      duration - the duration of the interval, null means zero-length
      endInstant - the interval end, null means now
      type - which set of fields this period supports, null means standard
    • MutablePeriod

      public MutablePeriod(Object period)
      Creates a period by converting or copying from another object.

      The recognised object types are defined in ConverterManager and include ReadablePeriod, ReadableInterval and String. The String formats are described by ISOPeriodFormat.standard().

      Parameters:
      period - period to convert
      Throws:
      IllegalArgumentException - if period is invalid
      UnsupportedOperationException - if an unsupported field's value is non-zero
    • MutablePeriod

      public MutablePeriod(Object period, PeriodType type)
      Creates a period by converting or copying from another object.

      The recognised object types are defined in ConverterManager and include ReadablePeriod, ReadableInterval and String. The String formats are described by ISOPeriodFormat.standard().

      Parameters:
      period - period to convert
      type - which set of fields this period supports, null means use converter
      Throws:
      IllegalArgumentException - if period is invalid
      UnsupportedOperationException - if an unsupported field's value is non-zero
    • MutablePeriod

      public MutablePeriod(Object period, Chronology chrono)
      Creates a period by converting or copying from another object.

      The recognised object types are defined in ConverterManager and include ReadablePeriod, ReadableInterval and String. The String formats are described by ISOPeriodFormat.standard().

      Parameters:
      period - period to convert
      chrono - the chronology to use, null means ISO in default zone
      Throws:
      IllegalArgumentException - if period is invalid
      UnsupportedOperationException - if an unsupported field's value is non-zero
    • MutablePeriod

      public MutablePeriod(Object period, PeriodType type, Chronology chrono)
      Creates a period by converting or copying from another object.

      The recognised object types are defined in ConverterManager and include ReadablePeriod, ReadableInterval and String. The String formats are described by ISOPeriodFormat.standard().

      Parameters:
      period - period to convert
      type - which set of fields this period supports, null means use converter
      chrono - the chronology to use, null means ISO in default zone
      Throws:
      IllegalArgumentException - if period is invalid
      UnsupportedOperationException - if an unsupported field's value is non-zero
  • Method Details

    • parse

      public static MutablePeriod parse(String str)
      Parses a MutablePeriod from the specified string.

      This uses ISOPeriodFormat.standard().

      Parameters:
      str - the string to parse, not null
      Since:
      2.0
    • parse

      public static MutablePeriod parse(String str, PeriodFormatter formatter)
      Parses a MutablePeriod from the specified string using a formatter.
      Parameters:
      str - the string to parse, not null
      formatter - the formatter to use, not null
      Since:
      2.0
    • clear

      public void clear()
      Clears the period, setting all values back to zero.
      Specified by:
      clear in interface ReadWritablePeriod
    • setValue

      public void setValue(int index, int value)
      Sets the value of one of the fields by index.
      Specified by:
      setValue in interface ReadWritablePeriod
      Overrides:
      setValue in class BasePeriod
      Parameters:
      index - the field index
      value - the new value for the field
      Throws:
      IndexOutOfBoundsException - if the index is invalid
    • set

      public void set(DurationFieldType field, int value)
      Sets the value of one of the fields.

      The field type specified must be one of those that is supported by the period.

      Specified by:
      set in interface ReadWritablePeriod
      Parameters:
      field - a DurationFieldType instance that is supported by this period, not null
      value - the new value for the field
      Throws:
      IllegalArgumentException - if the field is null or not supported
    • setPeriod

      public void setPeriod(ReadablePeriod period)
      Sets all the fields in one go from another ReadablePeriod.
      Specified by:
      setPeriod in interface ReadWritablePeriod
      Overrides:
      setPeriod in class BasePeriod
      Parameters:
      period - the period to set, null means zero length period
      Throws:
      IllegalArgumentException - if an unsupported field's value is non-zero
    • setPeriod

      public void setPeriod(int years, int months, int weeks, int days, int hours, int minutes, int seconds, int millis)
      Sets all the fields in one go.
      Specified by:
      setPeriod in interface ReadWritablePeriod
      Overrides:
      setPeriod in class BasePeriod
      Parameters:
      years - amount of years in this period, which must be zero if unsupported
      months - amount of months in this period, which must be zero if unsupported
      weeks - amount of weeks in this period, which must be zero if unsupported
      days - amount of days in this period, which must be zero if unsupported
      hours - amount of hours in this period, which must be zero if unsupported
      minutes - amount of minutes in this period, which must be zero if unsupported
      seconds - amount of seconds in this period, which must be zero if unsupported
      millis - amount of milliseconds in this period, which must be zero if unsupported
      Throws:
      IllegalArgumentException - if an unsupported field's value is non-zero
    • setPeriod

      public void setPeriod(ReadableInterval interval)
      Sets all the fields in one go from an interval using the ISO chronology and dividing the fields using the period type.
      Specified by:
      setPeriod in interface ReadWritablePeriod
      Parameters:
      interval - the interval to set, null means zero length
      Throws:
      ArithmeticException - if the set exceeds the capacity of the period
    • setPeriod

      public void setPeriod(ReadableInstant start, ReadableInstant end)
      Sets all the fields in one go from two instants representing an interval.

      The chronology of the start instant is used, unless that is null when the chronology of the end instant is used instead.

      Parameters:
      start - the start instant, null means now
      end - the end instant, null means now
      Throws:
      ArithmeticException - if the set exceeds the capacity of the period
    • setPeriod

      public void setPeriod(long startInstant, long endInstant)
      Sets all the fields in one go from a millisecond interval using ISOChronology and dividing the fields using the period type.
      Parameters:
      startInstant - interval start, in milliseconds
      endInstant - interval end, in milliseconds
      Throws:
      ArithmeticException - if the set exceeds the capacity of the period
    • setPeriod

      public void setPeriod(long startInstant, long endInstant, Chronology chrono)
      Sets all the fields in one go from a millisecond interval.
      Parameters:
      startInstant - interval start, in milliseconds
      endInstant - interval end, in milliseconds
      chrono - the chronology to use, null means ISO chronology
      Throws:
      ArithmeticException - if the set exceeds the capacity of the period
    • setPeriod

      public void setPeriod(ReadableDuration duration)
      Sets all the fields in one go from a duration dividing the fields using the period type.

      When dividing the duration, only precise fields in the period type will be used. For large durations, all the remaining duration will be stored in the largest available precise field.

      Parameters:
      duration - the duration to set, null means zero length
      Throws:
      ArithmeticException - if the set exceeds the capacity of the period
    • setPeriod

      public void setPeriod(ReadableDuration duration, Chronology chrono)
      Sets all the fields in one go from a duration dividing the fields using the period type.

      When dividing the duration, only precise fields in the period type will be used. For large durations, all the remaining duration will be stored in the largest available precise field.

      Parameters:
      duration - the duration to set, null means zero length
      chrono - the chronology to use, null means ISO default
      Throws:
      ArithmeticException - if the set exceeds the capacity of the period
    • setPeriod

      public void setPeriod(long duration)
      Sets all the fields in one go from a millisecond duration dividing the fields using the period type.

      When dividing the duration, only precise fields in the period type will be used. For large durations, all the remaining duration will be stored in the largest available precise field.

      Parameters:
      duration - the duration, in milliseconds
      Throws:
      ArithmeticException - if the set exceeds the capacity of the period
    • setPeriod

      public void setPeriod(long duration, Chronology chrono)
      Sets all the fields in one go from a millisecond duration.

      When dividing the duration, only precise fields in the period type will be used. For large durations, all the remaining duration will be stored in the largest available precise field.

      Parameters:
      duration - the duration, in milliseconds
      chrono - the chronology to use, null means ISO chronology
      Throws:
      ArithmeticException - if the set exceeds the capacity of the period
    • add

      public void add(DurationFieldType field, int value)
      Adds to the value of one of the fields.

      The field type specified must be one of those that is supported by the period.

      Specified by:
      add in interface ReadWritablePeriod
      Parameters:
      field - a DurationFieldType instance that is supported by this period, not null
      value - the value to add to the field
      Throws:
      IllegalArgumentException - if the field is null or not supported
    • add

      public void add(ReadablePeriod period)
      Adds a period to this one by adding each field in turn.
      Specified by:
      add in interface ReadWritablePeriod
      Parameters:
      period - the period to add, null means add nothing
      Throws:
      IllegalArgumentException - if the period being added contains a field not supported by this period
      ArithmeticException - if the addition exceeds the capacity of the period
    • add

      public void add(int years, int months, int weeks, int days, int hours, int minutes, int seconds, int millis)
      Adds to each field of this period.
      Specified by:
      add in interface ReadWritablePeriod
      Parameters:
      years - amount of years to add to this period, which must be zero if unsupported
      months - amount of months to add to this period, which must be zero if unsupported
      weeks - amount of weeks to add to this period, which must be zero if unsupported
      days - amount of days to add to this period, which must be zero if unsupported
      hours - amount of hours to add to this period, which must be zero if unsupported
      minutes - amount of minutes to add to this period, which must be zero if unsupported
      seconds - amount of seconds to add to this period, which must be zero if unsupported
      millis - amount of milliseconds to add to this period, which must be zero if unsupported
      Throws:
      IllegalArgumentException - if the period being added contains a field not supported by this period
      ArithmeticException - if the addition exceeds the capacity of the period
    • add

      public void add(ReadableInterval interval)
      Adds an interval to this one by dividing the interval into fields and calling add(ReadablePeriod).
      Specified by:
      add in interface ReadWritablePeriod
      Parameters:
      interval - the interval to add, null means add nothing
      Throws:
      ArithmeticException - if the addition exceeds the capacity of the period
    • add

      public void add(ReadableDuration duration)
      Adds a duration to this one by dividing the duration into fields and calling add(ReadablePeriod).
      Parameters:
      duration - the duration to add, null means add nothing
      Throws:
      ArithmeticException - if the addition exceeds the capacity of the period
    • add

      public void add(long duration)
      Adds a millisecond duration to this one by dividing the duration into fields and calling add(ReadablePeriod).

      When dividing the duration, only precise fields in the period type will be used. For large durations, all the remaining duration will be stored in the largest available precise field.

      Parameters:
      duration - the duration, in milliseconds
      Throws:
      ArithmeticException - if the addition exceeds the capacity of the period
    • add

      public void add(long duration, Chronology chrono)
      Adds a millisecond duration to this one by dividing the duration into fields and calling add(ReadablePeriod).

      When dividing the duration, only precise fields in the period type will be used. For large durations, all the remaining duration will be stored in the largest available precise field.

      Parameters:
      duration - the duration, in milliseconds
      chrono - the chronology to use, null means ISO default
      Throws:
      ArithmeticException - if the addition exceeds the capacity of the period
    • mergePeriod

      public void mergePeriod(ReadablePeriod period)
      Merges all the fields from the specified period into this one.

      Fields that are not present in the specified period are left unaltered.

      Overrides:
      mergePeriod in class BasePeriod
      Parameters:
      period - the period to set, null ignored
      Throws:
      IllegalArgumentException - if an unsupported field's value is non-zero
    • getYears

      public int getYears()
      Gets the years field part of the period.
      Returns:
      the number of years in the period, zero if unsupported
    • getMonths

      public int getMonths()
      Gets the months field part of the period.
      Returns:
      the number of months in the period, zero if unsupported
    • getWeeks

      public int getWeeks()
      Gets the weeks field part of the period.
      Returns:
      the number of weeks in the period, zero if unsupported
    • getDays

      public int getDays()
      Gets the days field part of the period.
      Returns:
      the number of days in the period, zero if unsupported
    • getHours

      public int getHours()
      Gets the hours field part of the period.
      Returns:
      the number of hours in the period, zero if unsupported
    • getMinutes

      public int getMinutes()
      Gets the minutes field part of the period.
      Returns:
      the number of minutes in the period, zero if unsupported
    • getSeconds

      public int getSeconds()
      Gets the seconds field part of the period.
      Returns:
      the number of seconds in the period, zero if unsupported
    • getMillis

      public int getMillis()
      Gets the millis field part of the period.
      Returns:
      the number of millis in the period, zero if unsupported
    • setYears

      public void setYears(int years)
      Sets the number of years of the period.
      Specified by:
      setYears in interface ReadWritablePeriod
      Parameters:
      years - the number of years
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
    • addYears

      public void addYears(int years)
      Adds the specified years to the number of years in the period.
      Specified by:
      addYears in interface ReadWritablePeriod
      Parameters:
      years - the number of years
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
      ArithmeticException - if the addition exceeds the capacity of the period
    • setMonths

      public void setMonths(int months)
      Sets the number of months of the period.
      Specified by:
      setMonths in interface ReadWritablePeriod
      Parameters:
      months - the number of months
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
    • addMonths

      public void addMonths(int months)
      Adds the specified months to the number of months in the period.
      Specified by:
      addMonths in interface ReadWritablePeriod
      Parameters:
      months - the number of months
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
      ArithmeticException - if the addition exceeds the capacity of the period
    • setWeeks

      public void setWeeks(int weeks)
      Sets the number of weeks of the period.
      Specified by:
      setWeeks in interface ReadWritablePeriod
      Parameters:
      weeks - the number of weeks
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
    • addWeeks

      public void addWeeks(int weeks)
      Adds the specified weeks to the number of weeks in the period.
      Specified by:
      addWeeks in interface ReadWritablePeriod
      Parameters:
      weeks - the number of weeks
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
      ArithmeticException - if the addition exceeds the capacity of the period
    • setDays

      public void setDays(int days)
      Sets the number of days of the period.
      Specified by:
      setDays in interface ReadWritablePeriod
      Parameters:
      days - the number of days
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
    • addDays

      public void addDays(int days)
      Adds the specified days to the number of days in the period.
      Specified by:
      addDays in interface ReadWritablePeriod
      Parameters:
      days - the number of days
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
      ArithmeticException - if the addition exceeds the capacity of the period
    • setHours

      public void setHours(int hours)
      Sets the number of hours of the period.
      Specified by:
      setHours in interface ReadWritablePeriod
      Parameters:
      hours - the number of hours
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
    • addHours

      public void addHours(int hours)
      Adds the specified hours to the number of hours in the period.
      Specified by:
      addHours in interface ReadWritablePeriod
      Parameters:
      hours - the number of hours
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
      ArithmeticException - if the addition exceeds the capacity of the period
    • setMinutes

      public void setMinutes(int minutes)
      Sets the number of minutes of the period.
      Specified by:
      setMinutes in interface ReadWritablePeriod
      Parameters:
      minutes - the number of minutes
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
    • addMinutes

      public void addMinutes(int minutes)
      Adds the specified minutes to the number of minutes in the period.
      Specified by:
      addMinutes in interface ReadWritablePeriod
      Parameters:
      minutes - the number of minutes
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
      ArithmeticException - if the addition exceeds the capacity of the period
    • setSeconds

      public void setSeconds(int seconds)
      Sets the number of seconds of the period.
      Specified by:
      setSeconds in interface ReadWritablePeriod
      Parameters:
      seconds - the number of seconds
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
    • addSeconds

      public void addSeconds(int seconds)
      Adds the specified seconds to the number of seconds in the period.
      Specified by:
      addSeconds in interface ReadWritablePeriod
      Parameters:
      seconds - the number of seconds
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
      ArithmeticException - if the addition exceeds the capacity of the period
    • setMillis

      public void setMillis(int millis)
      Sets the number of millis of the period.
      Specified by:
      setMillis in interface ReadWritablePeriod
      Parameters:
      millis - the number of millis
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
    • addMillis

      public void addMillis(int millis)
      Adds the specified millis to the number of millis in the period.
      Specified by:
      addMillis in interface ReadWritablePeriod
      Parameters:
      millis - the number of millis
      Throws:
      IllegalArgumentException - if field is not supported and the value is non-zero
      ArithmeticException - if the addition exceeds the capacity of the period
    • copy

      public MutablePeriod copy()
      Clone this object without having to cast the returned object.
      Returns:
      a clone of the this object.
    • clone

      public Object clone()
      Clone this object.
      Overrides:
      clone in class Object
      Returns:
      a clone of this object.