- All Implemented Interfaces:
Serializable
,Comparable<Duration>
,TemporalAmount
This class models a quantity or amount of time in terms of seconds and nanoseconds.
It can be accessed using other duration-based 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 date-based 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 nanosecond-of-second, 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 leap-second and should not affect
most applications.
See Instant
for a discussion as to the meaning of the second and time-scales.
This is a value-based
class; programmers should treat instances that are
equal as interchangeable and should not
use instances for synchronization, or unpredictable behavior may
occur. For example, in a future release, synchronization may fail.
The equals
method should be used for comparisons.
- Implementation Requirements:
- This class is immutable and thread-safe.
- Since:
- 1.8
- See Also:
-
Field Summary
-
Method Summary
Modifier and TypeMethodDescriptionabs()
Returns a copy of this duration with a positive length.Adds this duration to the specified temporal object.static Duration
Obtains aDuration
representing the duration between two temporal objects.int
Compares this duration to the specifiedDuration
.dividedBy
(long divisor) Returns a copy of this duration divided by the specified value.long
Returns number of whole times a specified Duration occurs within this Duration.boolean
Checks if this duration is equal to the specifiedDuration
.static Duration
from
(TemporalAmount amount) Obtains an instance ofDuration
from a temporal amount.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
Gets the number of seconds in this duration.getUnits()
Gets the set of units supported by this duration.int
hashCode()
A hash code for this duration.boolean
Checks if this duration is negative, excluding zero.boolean
Checks if this duration is positive, excluding zero.boolean
isZero()
Checks if this duration is zero length.minus
(long amountToSubtract, TemporalUnit unit) Returns a copy of this duration with the specified duration subtracted.Returns a copy of this duration with the specified duration subtracted.minusDays
(long daysToSubtract) Returns a copy of this duration with the specified duration in standard 24 hour days subtracted.minusHours
(long hoursToSubtract) Returns a copy of this duration with the specified duration in hours subtracted.minusMillis
(long millisToSubtract) Returns a copy of this duration with the specified duration in milliseconds subtracted.minusMinutes
(long minutesToSubtract) Returns a copy of this duration with the specified duration in minutes subtracted.minusNanos
(long nanosToSubtract) Returns a copy of this duration with the specified duration in nanoseconds subtracted.minusSeconds
(long secondsToSubtract) Returns a copy of this duration with the specified duration in seconds subtracted.multipliedBy
(long multiplicand) Returns a copy of this duration multiplied by the scalar.negated()
Returns a copy of this duration with the length negated.static Duration
of
(long amount, TemporalUnit unit) Obtains aDuration
representing an amount in the specified unit.static Duration
ofDays
(long days) Obtains aDuration
representing a number of standard 24 hour days.static Duration
ofHours
(long hours) Obtains aDuration
representing a number of standard hours.static Duration
ofMillis
(long millis) Obtains aDuration
representing a number of milliseconds.static Duration
ofMinutes
(long minutes) Obtains aDuration
representing a number of standard minutes.static Duration
ofNanos
(long nanos) Obtains aDuration
representing a number of nanoseconds.static Duration
ofSeconds
(long seconds) Obtains aDuration
representing a number of seconds.static Duration
ofSeconds
(long seconds, long nanoAdjustment) Obtains aDuration
representing a number of seconds and an adjustment in nanoseconds.static Duration
parse
(CharSequence text) Obtains aDuration
from a text string such asPnDTnHnMn.nS
.plus
(long amountToAdd, TemporalUnit unit) Returns a copy of this duration with the specified duration added.Returns a copy of this duration with the specified duration added.plusDays
(long daysToAdd) Returns a copy of this duration with the specified duration in standard 24 hour days added.plusHours
(long hoursToAdd) Returns a copy of this duration with the specified duration in hours added.plusMillis
(long millisToAdd) Returns a copy of this duration with the specified duration in milliseconds added.plusMinutes
(long minutesToAdd) Returns a copy of this duration with the specified duration in minutes added.plusNanos
(long nanosToAdd) Returns a copy of this duration with the specified duration in nanoseconds added.plusSeconds
(long secondsToAdd) Returns a copy of this duration with the specified duration in seconds added.subtractFrom
(Temporal temporal) Subtracts this duration from the specified temporal object.long
toDays()
Gets the number of days in this duration.long
Extracts the number of days in the duration.long
toHours()
Gets the number of hours in this duration.int
Extracts the number of hours part in the duration.long
toMillis()
Converts this duration to the total length in milliseconds.int
Extracts the number of milliseconds part of the duration.long
Gets the number of minutes in this duration.int
Extracts the number of minutes part in the duration.long
toNanos()
Converts this duration to the total length in nanoseconds expressed as along
.int
Get the nanoseconds part within seconds of the duration.long
Gets the number of seconds in this duration.int
Extracts the number of seconds part in the duration.toString()
A string representation of this duration using ISO-8601 seconds based representation, such asPT8H6M12.345S
.truncatedTo
(TemporalUnit unit) Returns a copy of thisDuration
truncated to the specified unit.withNanos
(int nanoOfSecond) Returns a copy of this duration with the specified nano-of-second.withSeconds
(long seconds) Returns a copy of this duration with the specified amount of seconds.
-
Field Details
-
ZERO
Constant for a duration of zero.
-
-
Method Details
-
ofDays
Obtains aDuration
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
- the number of days, positive or negative- Returns:
- a
Duration
, not null - Throws:
ArithmeticException
- if the input days exceeds the capacity ofDuration
-
ofHours
Obtains aDuration
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
- the number of hours, positive or negative- Returns:
- a
Duration
, not null - Throws:
ArithmeticException
- if the input hours exceeds the capacity ofDuration
-
ofMinutes
Obtains aDuration
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
- the number of minutes, positive or negative- Returns:
- a
Duration
, not null - Throws:
ArithmeticException
- if the input minutes exceeds the capacity ofDuration
-
ofSeconds
Obtains aDuration
representing a number of seconds.The nanosecond in second field is set to zero.
- Parameters:
seconds
- the number of seconds, positive or negative- Returns:
- a
Duration
, not null
-
ofSeconds
Obtains aDuration
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 exactly the same duration:
Duration.ofSeconds(3, 1); Duration.ofSeconds(4, -999_999_999); Duration.ofSeconds(2, 1000_000_001);
- Parameters:
seconds
- the number of seconds, positive or negativenanoAdjustment
- the nanosecond adjustment to the number of seconds, positive or negative- Returns:
- a
Duration
, not null - Throws:
ArithmeticException
- if the adjustment causes the seconds to exceed the capacity ofDuration
-
ofMillis
Obtains aDuration
representing a number of milliseconds.The seconds and nanoseconds are extracted from the specified milliseconds.
- Parameters:
millis
- the number of milliseconds, positive or negative- Returns:
- a
Duration
, not null
-
ofNanos
Obtains aDuration
representing a number of nanoseconds.The seconds and nanoseconds are extracted from the specified nanoseconds.
- Parameters:
nanos
- the number of nanoseconds, positive or negative- Returns:
- a
Duration
, not null
-
of
Obtains aDuration
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 beChronoUnit.DAYS
which is treated as 24 hours. Other units throw an exception.- Parameters:
amount
- the amount of the duration, measured in terms of the unit, positive or negativeunit
- the unit that the duration is measured in, must have an exact duration, not null- Returns:
- a
Duration
, not null - Throws:
DateTimeException
- if the unit has an estimated durationArithmeticException
- if a numeric overflow occurs
-
from
Obtains an instance ofDuration
from a temporal amount.This obtains a duration based on the specified amount. A
TemporalAmount
represents an amount of time, which may be date-based or time-based, 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 beChronoUnit.DAYS
which is treated as 24 hours. If any other units are found then an exception is thrown.- Parameters:
amount
- the temporal amount to convert, not null- Returns:
- the equivalent duration, not null
- Throws:
DateTimeException
- if unable to convert to aDuration
ArithmeticException
- if numeric overflow occurs
-
parse
Obtains aDuration
from a text string such asPnDTnHnMn.nS
.This will parse a textual representation of a duration, including the string produced by
toString()
. The formats accepted are based on the ISO-8601 duration formatPnDTnHnMn.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 duration 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 a
long
. The number of seconds must parse to along
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 ISO-8601 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" "PT-6H3M" -- parses as "-6 hours and +3 minutes" "-PT6H3M" -- parses as "-6 hours and -3 minutes" "-PT-6H+3M" -- parses as "+6 hours and -3 minutes"
- Parameters:
text
- the text to parse, not null- Returns:
- the parsed duration, not null
- Throws:
DateTimeParseException
- if the text cannot be parsed to a duration
-
between
Obtains aDuration
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 aLocalTime
.The specified temporal objects must support the
SECONDS
unit. For full accuracy, either theNANOS
unit or theNANO_OF_SECOND
field should be supported.The result of this method can be a negative duration if the end is before the start. To guarantee to obtain a positive duration call
abs()
on the result.- Parameters:
startInclusive
- the start instant, inclusive, not nullendExclusive
- the end instant, exclusive, not null- Returns:
- a
Duration
, not null - Throws:
DateTimeException
- if the seconds between the temporals cannot be obtainedArithmeticException
- if the calculation exceeds the capacity ofDuration
-
get
Gets the value of the requested unit.This returns a value for each of the two supported units,
SECONDS
andNANOS
. All other units throw an exception.- Specified by:
get
in interfaceTemporalAmount
- Parameters:
unit
- theTemporalUnit
for which to return the value- Returns:
- the long value of the unit
- Throws:
DateTimeException
- if the unit is not supportedUnsupportedTemporalTypeException
- if the unit is not supported
-
getUnits
Gets the set of units supported by this duration.The supported units are
SECONDS
, andNANOS
. 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.- Specified by:
getUnits
in interfaceTemporalAmount
- Returns:
- a list containing the seconds and nanos units, not null
-
isPositive
public boolean isPositive()Checks if this duration is positive, excluding zero.A
Duration
represents a directed distance between two points on the time-line and can therefore be positive, zero or negative. This method checks whether the length is greater than zero.- Returns:
- true if this duration has a total length greater than zero
- Since:
- 18
-
isZero
public boolean isZero()Checks if this duration is zero length.A
Duration
represents a directed distance between two points on the time-line and can therefore be positive, zero or negative. This method checks whether the length is zero.- Returns:
- true if this duration has a total length equal to zero
-
isNegative
public boolean isNegative()Checks if this duration is negative, excluding zero.A
Duration
represents a directed distance between two points on the time-line and can therefore be positive, zero or negative. This method checks whether the length is less than zero.- Returns:
- true if this duration has a total length less than zero
-
getSeconds
public 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 time-line. 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:
- the whole seconds part of the length of the duration, positive or negative
-
getNano
public 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 time-line. 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:
- the nanoseconds within the second part of the length of the duration, from 0 to 999,999,999
-
withSeconds
Returns a copy of this duration with the specified amount of seconds.This returns a duration with the specified seconds, retaining the nano-of-second part of this duration.
This instance is immutable and unaffected by this method call.
- Parameters:
seconds
- the seconds to represent, may be negative- Returns:
- a
Duration
based on this duration with the requested seconds, not null
-
withNanos
Returns a copy of this duration with the specified nano-of-second.This returns a duration with the specified nano-of-second, retaining the seconds part of this duration.
This instance is immutable and unaffected by this method call.
- Parameters:
nanoOfSecond
- the nano-of-second to represent, from 0 to 999,999,999- Returns:
- a
Duration
based on this duration with the requested nano-of-second, not null - Throws:
DateTimeException
- if the nano-of-second is invalid
-
plus
Returns a copy of this duration with the specified duration added.This instance is immutable and unaffected by this method call.
- Parameters:
duration
- the duration to add, positive or negative, not null- Returns:
- a
Duration
based on this duration with the specified duration added, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
plus
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
ChronoUnit.DAYS
which is treated as 24 hours. Other units throw an exception.This instance is immutable and unaffected by this method call.
- Parameters:
amountToAdd
- the amount to add, measured in terms of the unit, positive or negativeunit
- the unit that the amount is measured in, must have an exact duration, not null- Returns:
- a
Duration
based on this duration with the specified duration added, not null - Throws:
UnsupportedTemporalTypeException
- if the unit is not supportedArithmeticException
- if numeric overflow occurs
-
plusDays
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
- the days to add, positive or negative- Returns:
- a
Duration
based on this duration with the specified days added, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
plusHours
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
- the hours to add, positive or negative- Returns:
- a
Duration
based on this duration with the specified hours added, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
plusMinutes
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
- the minutes to add, positive or negative- Returns:
- a
Duration
based on this duration with the specified minutes added, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
plusSeconds
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
- the seconds to add, positive or negative- Returns:
- a
Duration
based on this duration with the specified seconds added, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
plusMillis
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
- the milliseconds to add, positive or negative- Returns:
- a
Duration
based on this duration with the specified milliseconds added, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
plusNanos
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
- the nanoseconds to add, positive or negative- Returns:
- a
Duration
based on this duration with the specified nanoseconds added, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
minus
Returns a copy of this duration with the specified duration subtracted.This instance is immutable and unaffected by this method call.
- Parameters:
duration
- the duration to subtract, positive or negative, not null- Returns:
- a
Duration
based on this duration with the specified duration subtracted, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
minus
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
ChronoUnit.DAYS
which is treated as 24 hours. Other units throw an exception.This instance is immutable and unaffected by this method call.
- Parameters:
amountToSubtract
- the amount to subtract, measured in terms of the unit, positive or negativeunit
- the unit that the amount is measured in, must have an exact duration, not null- Returns:
- a
Duration
based on this duration with the specified duration subtracted, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
minusDays
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
- the days to subtract, positive or negative- Returns:
- a
Duration
based on this duration with the specified days subtracted, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
minusHours
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
- the hours to subtract, positive or negative- Returns:
- a
Duration
based on this duration with the specified hours subtracted, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
minusMinutes
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
- the minutes to subtract, positive or negative- Returns:
- a
Duration
based on this duration with the specified minutes subtracted, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
minusSeconds
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
- the seconds to subtract, positive or negative- Returns:
- a
Duration
based on this duration with the specified seconds subtracted, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
minusMillis
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
- the milliseconds to subtract, positive or negative- Returns:
- a
Duration
based on this duration with the specified milliseconds subtracted, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
minusNanos
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
- the nanoseconds to subtract, positive or negative- Returns:
- a
Duration
based on this duration with the specified nanoseconds subtracted, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
multipliedBy
Returns a copy of this duration multiplied by the scalar.This instance is immutable and unaffected by this method call.
- Parameters:
multiplicand
- the value to multiply the duration by, positive or negative- Returns:
- a
Duration
based on this duration multiplied by the specified scalar, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
dividedBy
Returns a copy of this duration divided by the specified value.This instance is immutable and unaffected by this method call.
- Parameters:
divisor
- the value to divide the duration by, positive or negative, not zero- Returns:
- 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
-
dividedBy
Returns number of whole times a specified Duration occurs within this Duration.This instance is immutable and unaffected by this method call.
- Parameters:
divisor
- the value to divide the duration by, positive or negative, not null- Returns:
- number of whole times, rounded toward zero, a specified
Duration
occurs within this Duration, may be negative - Throws:
ArithmeticException
- if the divisor is zero, or if numeric overflow occurs- Since:
- 9
-
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 asPT-1.3S
.This instance is immutable and unaffected by this method call.
- Returns:
- a
Duration
based on this duration with the amount negated, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
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,
PT-1.3S
will be returned asPT1.3S
.This instance is immutable and unaffected by this method call.
- Returns:
- a
Duration
based on this duration with an absolute length, not null - Throws:
ArithmeticException
- if numeric overflow occurs
-
addTo
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
Temporal.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 non-zero amounts will be added.
This instance is immutable and unaffected by this method call.
- Specified by:
addTo
in interfaceTemporalAmount
- Parameters:
temporal
- the temporal object to adjust, not null- Returns:
- an object of the same type with the adjustment made, not null
- Throws:
DateTimeException
- if unable to addArithmeticException
- if numeric overflow occurs
-
subtractFrom
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
Temporal.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 non-zero amounts will be added.
This instance is immutable and unaffected by this method call.
- Specified by:
subtractFrom
in interfaceTemporalAmount
- Parameters:
temporal
- the temporal object to adjust, not null- Returns:
- an object of the same type with the adjustment made, not null
- Throws:
DateTimeException
- if unable to subtractArithmeticException
- if numeric overflow occurs
-
toDays
public 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:
- the number of days in the duration, may be negative
-
toHours
public 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:
- the number of hours in the duration, may be negative
-
toMinutes
public 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:
- the number of minutes in the duration, may be negative
-
toSeconds
public long toSeconds()Gets the number of seconds in this duration.This returns the total number of whole seconds in the duration.
This instance is immutable and unaffected by this method call.
- Returns:
- the whole seconds part of the length of the duration, positive or negative
- Since:
- 9
-
toMillis
public 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:
- the total length of the duration in milliseconds
- Throws:
ArithmeticException
- if numeric overflow occurs
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toNanos
public long toNanos()Converts this duration to the total length in nanoseconds expressed as along
.If this duration is too large to fit in a
long
nanoseconds, then an exception is thrown.- Returns:
- the total length of the duration in nanoseconds
- Throws:
ArithmeticException
- if numeric overflow occurs
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toDaysPart
public long toDaysPart()Extracts the number of days in the 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.
- API Note:
- This method behaves exactly the same way as
toDays()
. - Returns:
- the number of days in the duration, may be negative
- Since:
- 9
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toHoursPart
public int toHoursPart()Extracts the number of hours part in the duration.This returns the number of remaining hours when dividing
toHours()
by hours in a day. This is based on the standard definition of a day as 24 hours.This instance is immutable and unaffected by this method call.
- Returns:
- the number of hours part in the duration, may be negative
- Since:
- 9
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toMinutesPart
public int toMinutesPart()Extracts the number of minutes part in the duration.This returns the number of remaining minutes when dividing
toMinutes()
by minutes in an hour. This is based on the standard definition of an hour as 60 minutes.This instance is immutable and unaffected by this method call.
- Returns:
- the number of minutes parts in the duration, may be negative
- Since:
- 9
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toSecondsPart
public int toSecondsPart()Extracts the number of seconds part in the duration.This returns the remaining seconds when dividing
toSeconds()
by seconds in a minute. This is based on the standard definition of a minute as 60 seconds.This instance is immutable and unaffected by this method call.
- Returns:
- the number of seconds parts in the duration, may be negative
- Since:
- 9
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toMillisPart
public int toMillisPart()Extracts the number of milliseconds part of the duration.This returns the milliseconds part by dividing the number of nanoseconds by 1,000,000. 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
getNano()
andgetSeconds()
.This instance is immutable and unaffected by this method call.
- Returns:
- the number of milliseconds part of the duration.
- Since:
- 9
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toNanosPart
public int toNanosPart()Get the nanoseconds part within seconds of the 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
getNano()
andgetSeconds()
.This instance is immutable and unaffected by this method call.
- Returns:
- the nanoseconds within the second part of the length of the duration, from 0 to 999,999,999
- Since:
- 9
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truncatedTo
Returns a copy of thisDuration
truncated to the specified unit.Truncating the duration returns a copy of the original with conceptual fields smaller than the specified unit set to zero. For example, truncating with the
MINUTES
unit will round down towards zero to the nearest minute, setting the seconds and nanoseconds to zero.The unit must have a duration that divides into the length of a standard day without remainder. This includes all time-based units on
ChronoUnit
andDAYS
. Other ChronoUnits throw an exception.This instance is immutable and unaffected by this method call.
- Parameters:
unit
- the unit to truncate to, not null- Returns:
- a
Duration
based on this duration with the time truncated, not null - Throws:
DateTimeException
- if the unit is invalid for truncationUnsupportedTemporalTypeException
- if the unit is not supported- Since:
- 9
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compareTo
Compares this duration to the specifiedDuration
.The comparison is based on the total length of the durations. It is "consistent with equals", as defined by
Comparable
.- Specified by:
compareTo
in interfaceComparable<Duration>
- Parameters:
otherDuration
- the other duration to compare to, not null- Returns:
- the comparator value, that is less than zero if this duration is less than
otherDuration
, zero if they are equal, greater than zero if this duration is greater thanotherDuration
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equals
Checks if this duration is equal to the specifiedDuration
.The comparison is based on the total length of the durations.
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hashCode
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toString
A string representation of this duration using ISO-8601 seconds based representation, such asPT8H6M12.345S
.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 in 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 withPeriod
.
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