Duration
public
final
class
Duration
extends Object
implements
TemporalAmount,
Comparable<Duration>,
Serializable
java.lang.Object  
↳  java.time.Duration 
A timebased amount of time, such as '34.5 seconds'.
This class models a quantity or amount of time in terms of seconds and nanoseconds.
It can be accessed using other durationbased units, such as minutes and hours.
In addition, the DAYS
unit can be used and is treated as
exactly equal to 24 hours, thus ignoring daylight savings effects.
See Period
for the datebased equivalent to this class.
A physical duration could be of infinite length.
For practicality, the duration is stored with constraints similar to Instant
.
The duration uses nanosecond resolution with a maximum value of the seconds that can
be held in a long
. This is greater than the current estimated age of the universe.
The range of a duration requires the storage of a number larger than a long
.
To achieve this, the class stores a long
representing seconds and an int
representing nanosecondofsecond, which will always be between 0 and 999,999,999.
The model is of a directed duration, meaning that the duration may be negative.
The duration is measured in "seconds", but these are not necessarily identical to
the scientific "SI second" definition based on atomic clocks.
This difference only impacts durations measured near a leapsecond and should not affect
most applications.
See Instant
for a discussion as to the meaning of the second and timescales.
Summary
Fields  

public
static
final
Duration 
ZERO
Constant for a duration of zero. 
Public methods  

Duration

abs()
Returns a copy of this duration with a positive length. 
Temporal

addTo(Temporal temporal)
Adds this duration to the specified temporal object. 
static
Duration

between(Temporal startInclusive, Temporal endExclusive)
Obtains a 
int

compareTo(Duration otherDuration)
Compares this duration to the specified 
Duration

dividedBy(long divisor)
Returns a copy of this duration divided by the specified value. 
boolean

equals(Object otherDuration)
Checks if this duration is equal to the specified 
static
Duration

from(TemporalAmount amount)
Obtains an instance of 
long

get(TemporalUnit unit)
Gets the value of the requested unit. 
int

getNano()
Gets the number of nanoseconds within the second in this duration. 
long

getSeconds()
Gets the number of seconds in this duration. 
List<TemporalUnit>

getUnits()
Gets the set of units supported by this duration. 
int

hashCode()
A hash code for this duration. 
boolean

isNegative()
Checks if this duration is negative, excluding zero. 
boolean

isZero()
Checks if this duration is zero length. 
Duration

minus(Duration duration)
Returns a copy of this duration with the specified duration subtracted. 
Duration

minus(long amountToSubtract, TemporalUnit unit)
Returns a copy of this duration with the specified duration subtracted. 
Duration

minusDays(long daysToSubtract)
Returns a copy of this duration with the specified duration in standard 24 hour days subtracted. 
Duration

minusHours(long hoursToSubtract)
Returns a copy of this duration with the specified duration in hours subtracted. 
Duration

minusMillis(long millisToSubtract)
Returns a copy of this duration with the specified duration in milliseconds subtracted. 
Duration

minusMinutes(long minutesToSubtract)
Returns a copy of this duration with the specified duration in minutes subtracted. 
Duration

minusNanos(long nanosToSubtract)
Returns a copy of this duration with the specified duration in nanoseconds subtracted. 
Duration

minusSeconds(long secondsToSubtract)
Returns a copy of this duration with the specified duration in seconds subtracted. 
Duration

multipliedBy(long multiplicand)
Returns a copy of this duration multiplied by the scalar. 
Duration

negated()
Returns a copy of this duration with the length negated. 
static
Duration

of(long amount, TemporalUnit unit)
Obtains a 
static
Duration

ofDays(long days)
Obtains a 
static
Duration

ofHours(long hours)
Obtains a 
static
Duration

ofMillis(long millis)
Obtains a 
static
Duration

ofMinutes(long minutes)
Obtains a 
static
Duration

ofNanos(long nanos)
Obtains a 
static
Duration

ofSeconds(long seconds, long nanoAdjustment)
Obtains a 
static
Duration

ofSeconds(long seconds)
Obtains a 
static
Duration

parse(CharSequence text)
Obtains a 
Duration

plus(Duration duration)
Returns a copy of this duration with the specified duration added. 
Duration

plus(long amountToAdd, TemporalUnit unit)
Returns a copy of this duration with the specified duration added. 
Duration

plusDays(long daysToAdd)
Returns a copy of this duration with the specified duration in standard 24 hour days added. 
Duration

plusHours(long hoursToAdd)
Returns a copy of this duration with the specified duration in hours added. 
Duration

plusMillis(long millisToAdd)
Returns a copy of this duration with the specified duration in milliseconds added. 
Duration

plusMinutes(long minutesToAdd)
Returns a copy of this duration with the specified duration in minutes added. 
Duration

plusNanos(long nanosToAdd)
Returns a copy of this duration with the specified duration in nanoseconds added. 
Duration

plusSeconds(long secondsToAdd)
Returns a copy of this duration with the specified duration in seconds added. 
Temporal

subtractFrom(Temporal temporal)
Subtracts this duration from the specified temporal object. 
long

toDays()
Gets the number of days in this duration. 
long

toHours()
Gets the number of hours in this duration. 
long

toMillis()
Converts this duration to the total length in milliseconds. 
long

toMinutes()
Gets the number of minutes in this duration. 
long

toNanos()
Converts this duration to the total length in nanoseconds expressed as a 
String

toString()
A string representation of this duration using ISO8601 seconds
based representation, such as 
Duration

withNanos(int nanoOfSecond)
Returns a copy of this duration with the specified nanoofsecond. 
Duration

withSeconds(long seconds)
Returns a copy of this duration with the specified amount of seconds. 
Inherited methods  

Fields
Public methods
abs
Duration abs ()
Returns a copy of this duration with a positive length.
This method returns a positive duration by effectively removing the sign from any negative total length.
For example, PT1.3S
will be returned as PT1.3S
.
This instance is immutable and unaffected by this method call.
Returns  

Duration 
a Duration based on this duration with an absolute length, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
addTo
Temporal addTo (Temporal temporal)
Adds this duration to the specified temporal object.
This returns a temporal object of the same observable type as the input with this duration added.
In most cases, it is clearer to reverse the calling pattern by using
plus(TemporalAmount)
.
// these two lines are equivalent, but the second approach is recommended dateTime = thisDuration.addTo(dateTime); dateTime = dateTime.plus(thisDuration);
The calculation will add the seconds, then nanos. Only nonzero amounts will be added.
This instance is immutable and unaffected by this method call.
Parameters  

temporal 
Temporal : the temporal object to adjust, not null 
Returns  

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

DateTimeException 
if unable to add 
ArithmeticException 
if numeric overflow occurs 
between
Duration between (Temporal startInclusive, Temporal endExclusive)
Obtains a Duration
representing the duration between two temporal objects.
This calculates the duration between two temporal objects. If the objects
are of different types, then the duration is calculated based on the type
of the first object. For example, if the first argument is a LocalTime
then the second argument is converted to a LocalTime
.
The specified temporal objects must support the SECONDS
unit.
For full accuracy, either the NANOS
unit or the
NANO_OF_SECOND
field should be supported.
The result of this method can be a negative period if the end is before the start.
To guarantee to obtain a positive duration call abs()
on the result.
Parameters  

startInclusive 
Temporal : the start instant, inclusive, not null 
endExclusive 
Temporal : the end instant, exclusive, not null 
Returns  

Duration 
a Duration , not null 
Throws  

DateTimeException 
if the seconds between the temporals cannot be obtained 
ArithmeticException 
if the calculation exceeds the capacity of Duration

compareTo
int compareTo (Duration otherDuration)
Compares this duration to the specified Duration
.
The comparison is based on the total length of the durations.
It is "consistent with equals", as defined by Comparable
.
Parameters  

otherDuration 
Duration : the other duration to compare to, not null 
Returns  

int 
the comparator value, negative if less, positive if greater 
dividedBy
Duration dividedBy (long divisor)
Returns a copy of this duration divided by the specified value.
This instance is immutable and unaffected by this method call.
Parameters  

divisor 
long : the value to divide the duration by, positive or negative, not zero 
Returns  

Duration 
a Duration based on this duration divided by the specified divisor, not null 
Throws  

ArithmeticException 
if the divisor is zero or if numeric overflow occurs 
equals
boolean equals (Object otherDuration)
Checks if this duration is equal to the specified Duration
.
The comparison is based on the total length of the durations.
Parameters  

otherDuration 
Object : the other duration, null returns false 
Returns  

boolean 
true if the other duration is equal to this one 
from
Duration from (TemporalAmount amount)
Obtains an instance of Duration
from a temporal amount.
This obtains a duration based on the specified amount.
A TemporalAmount
represents an amount of time, which may be
datebased or timebased, which this factory extracts to a duration.
The conversion loops around the set of units from the amount and uses
the duration of the unit to
calculate the total Duration
.
Only a subset of units are accepted by this method. The unit must either
have an exact duration
or be DAYS
which is treated as 24 hours.
If any other units are found then an exception is thrown.
Parameters  

amount 
TemporalAmount : the temporal amount to convert, not null 
Returns  

Duration 
the equivalent duration, not null 
Throws  

DateTimeException 
if unable to convert to a Duration 
ArithmeticException 
if numeric overflow occurs 
get
long get (TemporalUnit unit)
Gets the value of the requested unit.
This returns a value for each of the two supported units,
SECONDS
and NANOS
.
All other units throw an exception.
Parameters  

unit 
TemporalUnit : the TemporalUnit for which to return the value 
Returns  

long 
the long value of the unit 
Throws  

DateTimeException 
if the unit is not supported 
UnsupportedTemporalTypeException 
if the unit is not supported 
getNano
int getNano ()
Gets the number of nanoseconds within the second in this duration.
The length of the duration is stored using two fields  seconds and nanoseconds.
The nanoseconds part is a value from 0 to 999,999,999 that is an adjustment to
the length in seconds.
The total duration is defined by calling this method and getSeconds()
.
A Duration
represents a directed distance between two points on the timeline.
A negative duration is expressed by the negative sign of the seconds part.
A duration of 1 nanosecond is stored as 1 seconds plus 999,999,999 nanoseconds.
Returns  

int 
the nanoseconds within the second part of the length of the duration, from 0 to 999,999,999 
getSeconds
long getSeconds ()
Gets the number of seconds in this duration.
The length of the duration is stored using two fields  seconds and nanoseconds.
The nanoseconds part is a value from 0 to 999,999,999 that is an adjustment to
the length in seconds.
The total duration is defined by calling this method and getNano()
.
A Duration
represents a directed distance between two points on the timeline.
A negative duration is expressed by the negative sign of the seconds part.
A duration of 1 nanosecond is stored as 1 seconds plus 999,999,999 nanoseconds.
Returns  

long 
the whole seconds part of the length of the duration, positive or negative 
getUnits
List<TemporalUnit> getUnits ()
Gets the set of units supported by this duration.
The supported units are SECONDS
,
and NANOS
.
They are returned in the order seconds, nanos.
This set can be used in conjunction with get(TemporalUnit)
to access the entire state of the duration.
Returns  

List<TemporalUnit> 
a list containing the seconds and nanos units, not null 
hashCode
int hashCode ()
A hash code for this duration.
Returns  

int 
a suitable hash code 
isNegative
boolean isNegative ()
Checks if this duration is negative, excluding zero.
A Duration
represents a directed distance between two points on
the timeline and can therefore be positive, zero or negative.
This method checks whether the length is less than zero.
Returns  

boolean 
true if this duration has a total length less than zero 
isZero
boolean isZero ()
Checks if this duration is zero length.
A Duration
represents a directed distance between two points on
the timeline and can therefore be positive, zero or negative.
This method checks whether the length is zero.
Returns  

boolean 
true if this duration has a total length equal to zero 
minus
Duration minus (Duration duration)
Returns a copy of this duration with the specified duration subtracted.
This instance is immutable and unaffected by this method call.
Parameters  

duration 
Duration : the duration to subtract, positive or negative, not null 
Returns  

Duration 
a Duration based on this duration with the specified duration subtracted, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
minus
Duration minus (long amountToSubtract, TemporalUnit unit)
Returns a copy of this duration with the specified duration subtracted.
The duration amount is measured in terms of the specified unit.
Only a subset of units are accepted by this method.
The unit must either have an exact duration or
be DAYS
which is treated as 24 hours. Other units throw an exception.
This instance is immutable and unaffected by this method call.
Parameters  

amountToSubtract 
long : the amount to subtract, measured in terms of the unit, positive or negative 
unit 
TemporalUnit : the unit that the amount is measured in, must have an exact duration, not null 
Returns  

Duration 
a Duration based on this duration with the specified duration subtracted, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
minusDays
Duration minusDays (long daysToSubtract)
Returns a copy of this duration with the specified duration in standard 24 hour days subtracted.
The number of days is multiplied by 86400 to obtain the number of seconds to subtract. This is based on the standard definition of a day as 24 hours.
This instance is immutable and unaffected by this method call.
Parameters  

daysToSubtract 
long : the days to subtract, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified days subtracted, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
minusHours
Duration minusHours (long hoursToSubtract)
Returns a copy of this duration with the specified duration in hours subtracted.
The number of hours is multiplied by 3600 to obtain the number of seconds to subtract.
This instance is immutable and unaffected by this method call.
Parameters  

hoursToSubtract 
long : the hours to subtract, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified hours subtracted, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
minusMillis
Duration minusMillis (long millisToSubtract)
Returns a copy of this duration with the specified duration in milliseconds subtracted.
This instance is immutable and unaffected by this method call.
Parameters  

millisToSubtract 
long : the milliseconds to subtract, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified milliseconds subtracted, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
minusMinutes
Duration minusMinutes (long minutesToSubtract)
Returns a copy of this duration with the specified duration in minutes subtracted.
The number of hours is multiplied by 60 to obtain the number of seconds to subtract.
This instance is immutable and unaffected by this method call.
Parameters  

minutesToSubtract 
long : the minutes to subtract, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified minutes subtracted, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
minusNanos
Duration minusNanos (long nanosToSubtract)
Returns a copy of this duration with the specified duration in nanoseconds subtracted.
This instance is immutable and unaffected by this method call.
Parameters  

nanosToSubtract 
long : the nanoseconds to subtract, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified nanoseconds subtracted, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
minusSeconds
Duration minusSeconds (long secondsToSubtract)
Returns a copy of this duration with the specified duration in seconds subtracted.
This instance is immutable and unaffected by this method call.
Parameters  

secondsToSubtract 
long : the seconds to subtract, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified seconds subtracted, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
multipliedBy
Duration multipliedBy (long multiplicand)
Returns a copy of this duration multiplied by the scalar.
This instance is immutable and unaffected by this method call.
Parameters  

multiplicand 
long : the value to multiply the duration by, positive or negative 
Returns  

Duration 
a Duration based on this duration multiplied by the specified scalar, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
negated
Duration negated ()
Returns a copy of this duration with the length negated.
This method swaps the sign of the total length of this duration.
For example, PT1.3S
will be returned as PT1.3S
.
This instance is immutable and unaffected by this method call.
Returns  

Duration 
a Duration based on this duration with the amount negated, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
of
Duration of (long amount, TemporalUnit unit)
Obtains a Duration
representing an amount in the specified unit.
The parameters represent the two parts of a phrase like '6 Hours'. For example:
Duration.of(3, SECONDS); Duration.of(465, HOURS);Only a subset of units are accepted by this method. The unit must either have an exact duration or be
DAYS
which is treated as 24 hours. Other units throw an exception.
Parameters  

amount 
long : the amount of the duration, measured in terms of the unit, positive or negative 
unit 
TemporalUnit : the unit that the duration is measured in, must have an exact duration, not null 
Returns  

Duration 
a Duration , not null 
Throws  

DateTimeException 
if the period unit has an estimated duration 
ArithmeticException 
if a numeric overflow occurs 
ofDays
Duration ofDays (long days)
Obtains a Duration
representing a number of standard 24 hour days.
The seconds are calculated based on the standard definition of a day, where each day is 86400 seconds which implies a 24 hour day. The nanosecond in second field is set to zero.
Parameters  

days 
long : the number of days, positive or negative 
Returns  

Duration 
a Duration , not null 
Throws  

ArithmeticException 
if the input days exceeds the capacity of Duration

ofHours
Duration ofHours (long hours)
Obtains a Duration
representing a number of standard hours.
The seconds are calculated based on the standard definition of an hour, where each hour is 3600 seconds. The nanosecond in second field is set to zero.
Parameters  

hours 
long : the number of hours, positive or negative 
Returns  

Duration 
a Duration , not null 
Throws  

ArithmeticException 
if the input hours exceeds the capacity of Duration

ofMillis
Duration ofMillis (long millis)
Obtains a Duration
representing a number of milliseconds.
The seconds and nanoseconds are extracted from the specified milliseconds.
Parameters  

millis 
long : the number of milliseconds, positive or negative 
Returns  

Duration 
a Duration , not null

ofMinutes
Duration ofMinutes (long minutes)
Obtains a Duration
representing a number of standard minutes.
The seconds are calculated based on the standard definition of a minute, where each minute is 60 seconds. The nanosecond in second field is set to zero.
Parameters  

minutes 
long : the number of minutes, positive or negative 
Returns  

Duration 
a Duration , not null 
Throws  

ArithmeticException 
if the input minutes exceeds the capacity of Duration

ofNanos
Duration ofNanos (long nanos)
Obtains a Duration
representing a number of nanoseconds.
The seconds and nanoseconds are extracted from the specified nanoseconds.
Parameters  

nanos 
long : the number of nanoseconds, positive or negative 
Returns  

Duration 
a Duration , not null

ofSeconds
Duration ofSeconds (long seconds, long nanoAdjustment)
Obtains a Duration
representing a number of seconds and an
adjustment in nanoseconds.
This method allows an arbitrary number of nanoseconds to be passed in. The factory will alter the values of the second and nanosecond in order to ensure that the stored nanosecond is in the range 0 to 999,999,999. For example, the following will result in the exactly the same duration:
Duration.ofSeconds(3, 1); Duration.ofSeconds(4, 999_999_999); Duration.ofSeconds(2, 1000_000_001);
Parameters  

seconds 
long : the number of seconds, positive or negative 
nanoAdjustment 
long : the nanosecond adjustment to the number of seconds, positive or negative 
Returns  

Duration 
a Duration , not null 
Throws  

ArithmeticException 
if the adjustment causes the seconds to exceed the capacity of Duration

ofSeconds
Duration ofSeconds (long seconds)
Obtains a Duration
representing a number of seconds.
The nanosecond in second field is set to zero.
Parameters  

seconds 
long : the number of seconds, positive or negative 
Returns  

Duration 
a Duration , not null

parse
Duration parse (CharSequence text)
Obtains a Duration
from a text string such as PnDTnHnMn.nS
.
This will parse a textual representation of a duration, including the
string produced by toString()
. The formats accepted are based
on the ISO8601 duration format PnDTnHnMn.nS
with days
considered to be exactly 24 hours.
The string starts with an optional sign, denoted by the ASCII negative
or positive symbol. If negative, the whole period is negated.
The ASCII letter "P" is next in upper or lower case.
There are then four sections, each consisting of a number and a suffix.
The sections have suffixes in ASCII of "D", "H", "M" and "S" for
days, hours, minutes and seconds, accepted in upper or lower case.
The suffixes must occur in order. The ASCII letter "T" must occur before
the first occurrence, if any, of an hour, minute or second section.
At least one of the four sections must be present, and if "T" is present
there must be at least one section after the "T".
The number part of each section must consist of one or more ASCII digits.
The number may be prefixed by the ASCII negative or positive symbol.
The number of days, hours and minutes must parse to an long
.
The number of seconds must parse to an long
with optional fraction.
The decimal point may be either a dot or a comma.
The fractional part may have from zero to 9 digits.
The leading plus/minus sign, and negative values for other units are not part of the ISO8601 standard.
Examples:
"PT20.345S"  parses as "20.345 seconds" "PT15M"  parses as "15 minutes" (where a minute is 60 seconds) "PT10H"  parses as "10 hours" (where an hour is 3600 seconds) "P2D"  parses as "2 days" (where a day is 24 hours or 86400 seconds) "P2DT3H4M"  parses as "2 days, 3 hours and 4 minutes" "P6H3M"  parses as "6 hours and +3 minutes" "P6H3M"  parses as "6 hours and 3 minutes" "P6H+3M"  parses as "+6 hours and 3 minutes"
Parameters  

text 
CharSequence : the text to parse, not null 
Returns  

Duration 
the parsed duration, not null 
Throws  

DateTimeParseException 
if the text cannot be parsed to a duration 
plus
Duration plus (Duration duration)
Returns a copy of this duration with the specified duration added.
This instance is immutable and unaffected by this method call.
Parameters  

duration 
Duration : the duration to add, positive or negative, not null 
Returns  

Duration 
a Duration based on this duration with the specified duration added, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
plus
Duration plus (long amountToAdd, TemporalUnit unit)
Returns a copy of this duration with the specified duration added.
The duration amount is measured in terms of the specified unit.
Only a subset of units are accepted by this method.
The unit must either have an exact duration or
be DAYS
which is treated as 24 hours. Other units throw an exception.
This instance is immutable and unaffected by this method call.
Parameters  

amountToAdd 
long : the amount to add, measured in terms of the unit, positive or negative 
unit 
TemporalUnit : the unit that the amount is measured in, must have an exact duration, not null 
Returns  

Duration 
a Duration based on this duration with the specified duration added, not null 
Throws  

UnsupportedTemporalTypeException 
if the unit is not supported 
ArithmeticException 
if numeric overflow occurs 
plusDays
Duration plusDays (long daysToAdd)
Returns a copy of this duration with the specified duration in standard 24 hour days added.
The number of days is multiplied by 86400 to obtain the number of seconds to add. This is based on the standard definition of a day as 24 hours.
This instance is immutable and unaffected by this method call.
Parameters  

daysToAdd 
long : the days to add, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified days added, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
plusHours
Duration plusHours (long hoursToAdd)
Returns a copy of this duration with the specified duration in hours added.
This instance is immutable and unaffected by this method call.
Parameters  

hoursToAdd 
long : the hours to add, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified hours added, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
plusMillis
Duration plusMillis (long millisToAdd)
Returns a copy of this duration with the specified duration in milliseconds added.
This instance is immutable and unaffected by this method call.
Parameters  

millisToAdd 
long : the milliseconds to add, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified milliseconds added, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
plusMinutes
Duration plusMinutes (long minutesToAdd)
Returns a copy of this duration with the specified duration in minutes added.
This instance is immutable and unaffected by this method call.
Parameters  

minutesToAdd 
long : the minutes to add, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified minutes added, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
plusNanos
Duration plusNanos (long nanosToAdd)
Returns a copy of this duration with the specified duration in nanoseconds added.
This instance is immutable and unaffected by this method call.
Parameters  

nanosToAdd 
long : the nanoseconds to add, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified nanoseconds added, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
plusSeconds
Duration plusSeconds (long secondsToAdd)
Returns a copy of this duration with the specified duration in seconds added.
This instance is immutable and unaffected by this method call.
Parameters  

secondsToAdd 
long : the seconds to add, positive or negative 
Returns  

Duration 
a Duration based on this duration with the specified seconds added, not null 
Throws  

ArithmeticException 
if numeric overflow occurs 
subtractFrom
Temporal subtractFrom (Temporal temporal)
Subtracts this duration from the specified temporal object.
This returns a temporal object of the same observable type as the input with this duration subtracted.
In most cases, it is clearer to reverse the calling pattern by using
minus(TemporalAmount)
.
// these two lines are equivalent, but the second approach is recommended dateTime = thisDuration.subtractFrom(dateTime); dateTime = dateTime.minus(thisDuration);
The calculation will subtract the seconds, then nanos. Only nonzero amounts will be added.
This instance is immutable and unaffected by this method call.
Parameters  

temporal 
Temporal : the temporal object to adjust, not null 
Returns  

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

DateTimeException 
if unable to subtract 
ArithmeticException 
if numeric overflow occurs 
toDays
long toDays ()
Gets the number of days in this duration.
This returns the total number of days in the duration by dividing the number of seconds by 86400. This is based on the standard definition of a day as 24 hours.
This instance is immutable and unaffected by this method call.
Returns  

long 
the number of days in the duration, may be negative 
toHours
long toHours ()
Gets the number of hours in this duration.
This returns the total number of hours in the duration by dividing the number of seconds by 3600.
This instance is immutable and unaffected by this method call.
Returns  

long 
the number of hours in the duration, may be negative 
toMillis
long toMillis ()
Converts this duration to the total length in milliseconds.
If this duration is too large to fit in a long
milliseconds, then an
exception is thrown.
If this duration has greater than millisecond precision, then the conversion will drop any excess precision information as though the amount in nanoseconds was subject to integer division by one million.
Returns  

long 
the total length of the duration in milliseconds 
Throws  

ArithmeticException 
if numeric overflow occurs 
toMinutes
long toMinutes ()
Gets the number of minutes in this duration.
This returns the total number of minutes in the duration by dividing the number of seconds by 60.
This instance is immutable and unaffected by this method call.
Returns  

long 
the number of minutes in the duration, may be negative 
toNanos
long toNanos ()
Converts this duration to the total length in nanoseconds expressed as a long
.
If this duration is too large to fit in a long
nanoseconds, then an
exception is thrown.
Returns  

long 
the total length of the duration in nanoseconds 
Throws  

ArithmeticException 
if numeric overflow occurs 
toString
String toString ()
A string representation of this duration using ISO8601 seconds
based representation, such as PT8H6M12.345S
.
The format of the returned string will be PTnHnMnS
, where n is
the relevant hours, minutes or seconds part of the duration.
Any fractional seconds are placed after a decimal point i the seconds section.
If a section has a zero value, it is omitted.
The hours, minutes and seconds will all have the same sign.
Examples:
"20.345 seconds"  "PT20.345S "15 minutes" (15 * 60 seconds)  "PT15M" "10 hours" (10 * 3600 seconds)  "PT10H" "2 days" (2 * 86400 seconds)  "PT48H"Note that multiples of 24 hours are not output as days to avoid confusion with
Period
.
Returns  

String 
an ISO8601 representation of this duration, not null 
withNanos
Duration withNanos (int nanoOfSecond)
Returns a copy of this duration with the specified nanoofsecond.
This returns a duration with the specified nanoofsecond, retaining the seconds part of this duration.
This instance is immutable and unaffected by this method call.
Parameters  

nanoOfSecond 
int : the nanoofsecond to represent, from 0 to 999,999,999 
Returns  

Duration 
a Duration based on this period with the requested nanoofsecond, not null 
Throws  

DateTimeException 
if the nanoofsecond is invalid 
withSeconds
Duration withSeconds (long seconds)
Returns a copy of this duration with the specified amount of seconds.
This returns a duration with the specified seconds, retaining the nanoofsecond part of this duration.
This instance is immutable and unaffected by this method call.
Parameters  

seconds 
long : the seconds to represent, may be negative 
Returns  

Duration 
a Duration based on this period with the requested seconds, not null
