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/OpenJDK 8

Class LocalTime

java.lang.Object
- java.time.LocalTime

All Implemented Interfaces:: Serializable, Comparable<LocalTime>, Temporal, TemporalAccessor, TemporalAdjuster

public final class LocalTime
extends Object
implements Temporal, TemporalAdjuster, Comparable<LocalTime>, Serializable

A time without a time-zone in the ISO-8601 calendar system, such as 10:15:30.

LocalTime is an immutable date-time object that represents a time, often viewed as hour-minute-second. Time is represented to nanosecond precision. For example, the value "13:45.30.123456789" can be stored in a LocalTime.

This class does not store or represent a date or time-zone. Instead, it is a description of the local time as seen on a wall clock. It cannot represent an instant on the time-line without additional information such as an offset or time-zone.

The ISO-8601 calendar system is the modern civil calendar system used today in most of the world. This API assumes that all calendar systems use the same representation, this class, for time-of-day.

This is a value-based class; use of identity-sensitive operations (including reference equality (==), identity hash code, or synchronization) on instances of LocalTime may have unpredictable results and should be avoided. The equals method should be used for comparisons.

Implementation Requirements:: This class is immutable and thread-safe.
Since:: 1.8

Fields

MIN

public static final LocalTime MIN

The minimum supported LocalTime, '00:00'. This is the time of midnight at the start of the day.

MAX

public static final LocalTime MAX

The maximum supported LocalTime, '23:59:59.999999999'. This is the time just before midnight at the end of the day.

MIDNIGHT

public static final LocalTime MIDNIGHT

The time of midnight at the start of the day, '00:00'.

NOON

public static final LocalTime NOON

The time of noon in the middle of the day, '12:00'.

Methods

now

public static LocalTime now()

Obtains the current time from the system clock in the default time-zone.

This will query the system clock in the default time-zone to obtain the current time.

Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.

Returns:: the current time using the system clock and default time-zone, not null

now

public static LocalTime now(ZoneId zone)

Obtains the current time from the system clock in the specified time-zone.

This will query the system clock to obtain the current time. Specifying the time-zone avoids dependence on the default time-zone.

Using this method will prevent the ability to use an alternate clock for testing because the clock is hard-coded.

Parameters:: zone - the zone ID to use, not null
Returns:: the current time using the system clock, not null

now

public static LocalTime now(Clock clock)

Obtains the current time from the specified clock.

This will query the specified clock to obtain the current time. Using this method allows the use of an alternate clock for testing. The alternate clock may be introduced using dependency injection.

Parameters:: clock - the clock to use, not null
Returns:: the current time, not null

of

public static LocalTime of(int hour,
                           int minute)

Obtains an instance of LocalTime from an hour and minute.

This returns a LocalTime with the specified hour and minute. The second and nanosecond fields will be set to zero.

Parameters:: hour - the hour-of-day to represent, from 0 to 23; minute - the minute-of-hour to represent, from 0 to 59
Returns:: the local time, not null
Throws:: DateTimeException - if the value of any field is out of range

of

public static LocalTime of(int hour,
                           int minute,
                           int second)

Obtains an instance of LocalTime from an hour, minute and second.

This returns a LocalTime with the specified hour, minute and second. The nanosecond field will be set to zero.

Parameters:: hour - the hour-of-day to represent, from 0 to 23; minute - the minute-of-hour to represent, from 0 to 59; second - the second-of-minute to represent, from 0 to 59
Returns:: the local time, not null
Throws:: DateTimeException - if the value of any field is out of range

of

public static LocalTime of(int hour,
                           int minute,
                           int second,
                           int nanoOfSecond)

Obtains an instance of LocalTime from an hour, minute, second and nanosecond.

This returns a LocalTime with the specified hour, minute, second and nanosecond.

Parameters:: hour - the hour-of-day to represent, from 0 to 23; minute - the minute-of-hour to represent, from 0 to 59; second - the second-of-minute to represent, from 0 to 59; nanoOfSecond - the nano-of-second to represent, from 0 to 999,999,999
Returns:: the local time, not null
Throws:: DateTimeException - if the value of any field is out of range

ofSecondOfDay

public static LocalTime ofSecondOfDay(long secondOfDay)

Obtains an instance of LocalTime from a second-of-day value.

This returns a LocalTime with the specified second-of-day. The nanosecond field will be set to zero.

Parameters:: secondOfDay - the second-of-day, from 0 to 24 * 60 * 60 - 1
Returns:: the local time, not null
Throws:: DateTimeException - if the second-of-day value is invalid

ofNanoOfDay

public static LocalTime ofNanoOfDay(long nanoOfDay)

Obtains an instance of LocalTime from a nanos-of-day value.

This returns a LocalTime with the specified nanosecond-of-day.

Parameters:: nanoOfDay - the nano of day, from 0 to 24 * 60 * 60 * 1,000,000,000 - 1
Returns:: the local time, not null
Throws:: DateTimeException - if the nanos of day value is invalid

from

public static LocalTime from(TemporalAccessor temporal)

Obtains an instance of LocalTime from a temporal object.

This obtains a local time based on the specified temporal. A TemporalAccessor represents an arbitrary set of date and time information, which this factory converts to an instance of LocalTime.

The conversion uses the TemporalQueries.localTime() query, which relies on extracting the NANO_OF_DAY field.

This method matches the signature of the functional interface TemporalQuery allowing it to be used as a query via method reference, LocalTime::from.

Parameters:: temporal - the temporal object to convert, not null
Returns:: the local time, not null
Throws:: DateTimeException - if unable to convert to a LocalTime

parse

public static LocalTime parse(CharSequence text)

Obtains an instance of LocalTime from a text string such as 10:15.

The string must represent a valid time and is parsed using DateTimeFormatter.ISO_LOCAL_TIME.

Parameters:: text - the text to parse such as "10:15:30", not null
Returns:: the parsed local time, not null
Throws:: DateTimeParseException - if the text cannot be parsed

parse

public static LocalTime parse(CharSequence text,
                              DateTimeFormatter formatter)

Obtains an instance of LocalTime from a text string using a specific formatter.

The text is parsed using the formatter, returning a time.

Parameters:: text - the text to parse, not null; formatter - the formatter to use, not null
Returns:: the parsed local time, not null
Throws:: DateTimeParseException - if the text cannot be parsed

isSupported

public boolean isSupported(TemporalField field)

Checks if the specified field is supported.

This checks if this time can be queried for the specified field. If false, then calling the range, get and with(TemporalField, long) methods will throw an exception.

If the field is a ChronoField then the query is implemented here. The supported fields are:

NANO_OF_SECOND
NANO_OF_DAY
MICRO_OF_SECOND
MICRO_OF_DAY
MILLI_OF_SECOND
MILLI_OF_DAY
SECOND_OF_MINUTE
SECOND_OF_DAY
MINUTE_OF_HOUR
MINUTE_OF_DAY
HOUR_OF_AMPM
CLOCK_HOUR_OF_AMPM
HOUR_OF_DAY
CLOCK_HOUR_OF_DAY
AMPM_OF_DAY

All other ChronoField instances will return false.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.isSupportedBy(TemporalAccessor) passing this as the argument. Whether the field is supported is determined by the field.

Specified by:: isSupported in interface TemporalAccessor
Parameters:: field - the field to check, null returns false
Returns:: true if the field is supported on this time, false if not

isSupported

public boolean isSupported(TemporalUnit unit)

Checks if the specified unit is supported.

This checks if the specified unit can be added to, or subtracted from, this time. If false, then calling the plus(long, TemporalUnit) and minus methods will throw an exception.

If the unit is a ChronoUnit then the query is implemented here. The supported units are:

NANOS
MICROS
MILLIS
SECONDS
MINUTES
HOURS
HALF_DAYS

All other ChronoUnit instances will return false.

If the unit is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.isSupportedBy(Temporal) passing this as the argument. Whether the unit is supported is determined by the unit.

Specified by:: isSupported in interface Temporal
Parameters:: unit - the unit to check, null returns false
Returns:: true if the unit can be added/subtracted, false if not

range

public ValueRange range(TemporalField field)

Gets the range of valid values for the specified field.

The range object expresses the minimum and maximum valid values for a field. This time is used to enhance the accuracy of the returned range. If it is not possible to return the range, because the field is not supported or for some other reason, an exception is thrown.

If the field is a ChronoField then the query is implemented here. The supported fields will return appropriate range instances. All other ChronoField instances will throw an UnsupportedTemporalTypeException.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.rangeRefinedBy(TemporalAccessor) passing this as the argument. Whether the range can be obtained is determined by the field.

Specified by:: range in interface TemporalAccessor
Parameters:: field - the field to query the range for, not null
Returns:: the range of valid values for the field, not null
Throws:: DateTimeException - if the range for the field cannot be obtained; UnsupportedTemporalTypeException - if the field is not supported

get

public int get(TemporalField field)

Gets the value of the specified field from this time as an int.

This queries this time for the value of the specified field. The returned value will always be within the valid range of values for the field. If it is not possible to return the value, because the field is not supported or for some other reason, an exception is thrown.

If the field is a ChronoField then the query is implemented here. The supported fields will return valid values based on this time, except NANO_OF_DAY and MICRO_OF_DAY which are too large to fit in an int and throw a DateTimeException. All other ChronoField instances will throw an UnsupportedTemporalTypeException.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.getFrom(TemporalAccessor) passing this as the argument. Whether the value can be obtained, and what the value represents, is determined by the field.

Specified by:: get in interface TemporalAccessor
Parameters:: field - the field to get, not null
Returns:: the value for the field
Throws:: DateTimeException - if a value for the field cannot be obtained or the value is outside the range of valid values for the field; UnsupportedTemporalTypeException - if the field is not supported or the range of values exceeds an int; ArithmeticException - if numeric overflow occurs

getLong

public long getLong(TemporalField field)

Gets the value of the specified field from this time as a long.

This queries this time for the value of the specified field. If it is not possible to return the value, because the field is not supported or for some other reason, an exception is thrown.

If the field is a ChronoField then the query is implemented here. The supported fields will return valid values based on this time. All other ChronoField instances will throw an UnsupportedTemporalTypeException.

Specified by:: getLong in interface TemporalAccessor
Parameters:: field - the field to get, not null
Returns:: the value for the field
Throws:: DateTimeException - if a value for the field cannot be obtained; UnsupportedTemporalTypeException - if the field is not supported; ArithmeticException - if numeric overflow occurs

getHour

public int getHour()

Gets the hour-of-day field.

Returns:: the hour-of-day, from 0 to 23

getMinute

public int getMinute()

Gets the minute-of-hour field.

Returns:: the minute-of-hour, from 0 to 59

getSecond

public int getSecond()

Gets the second-of-minute field.

Returns:: the second-of-minute, from 0 to 59

getNano

public int getNano()

Gets the nano-of-second field.

Returns:: the nano-of-second, from 0 to 999,999,999

with

public LocalTime with(TemporalAdjuster adjuster)

Returns an adjusted copy of this time.

This returns a LocalTime, based on this one, with the time adjusted. The adjustment takes place using the specified adjuster strategy object. Read the documentation of the adjuster to understand what adjustment will be made.

A simple adjuster might simply set the one of the fields, such as the hour field. A more complex adjuster might set the time to the last hour of the day.

The result of this method is obtained by invoking the TemporalAdjuster.adjustInto(Temporal) method on the specified adjuster passing this as the argument.

This instance is immutable and unaffected by this method call.

Specified by:: with in interface Temporal
Parameters:: adjuster - the adjuster to use, not null
Returns:: a LocalTime based on this with the adjustment made, not null
Throws:: DateTimeException - if the adjustment cannot be made; ArithmeticException - if numeric overflow occurs

with

public LocalTime with(TemporalField field,
                      long newValue)

Returns a copy of this time with the specified field set to a new value.

This returns a LocalTime, based on this one, with the value for the specified field changed. This can be used to change any supported field, such as the hour, minute or second. If it is not possible to set the value, because the field is not supported or for some other reason, an exception is thrown.

If the field is a ChronoField then the adjustment is implemented here. The supported fields behave as follows:

NANO_OF_SECOND - Returns a LocalTime with the specified nano-of-second. The hour, minute and second will be unchanged.
NANO_OF_DAY - Returns a LocalTime with the specified nano-of-day. This completely replaces the time and is equivalent to ofNanoOfDay(long).
MICRO_OF_SECOND - Returns a LocalTime with the nano-of-second replaced by the specified micro-of-second multiplied by 1,000. The hour, minute and second will be unchanged.
MICRO_OF_DAY - Returns a LocalTime with the specified micro-of-day. This completely replaces the time and is equivalent to using ofNanoOfDay(long) with the micro-of-day multiplied by 1,000.
MILLI_OF_SECOND - Returns a LocalTime with the nano-of-second replaced by the specified milli-of-second multiplied by 1,000,000. The hour, minute and second will be unchanged.
MILLI_OF_DAY - Returns a LocalTime with the specified milli-of-day. This completely replaces the time and is equivalent to using ofNanoOfDay(long) with the milli-of-day multiplied by 1,000,000.
SECOND_OF_MINUTE - Returns a LocalTime with the specified second-of-minute. The hour, minute and nano-of-second will be unchanged.
SECOND_OF_DAY - Returns a LocalTime with the specified second-of-day. The nano-of-second will be unchanged.
MINUTE_OF_HOUR - Returns a LocalTime with the specified minute-of-hour. The hour, second-of-minute and nano-of-second will be unchanged.
MINUTE_OF_DAY - Returns a LocalTime with the specified minute-of-day. The second-of-minute and nano-of-second will be unchanged.
HOUR_OF_AMPM - Returns a LocalTime with the specified hour-of-am-pm. The AM/PM, minute-of-hour, second-of-minute and nano-of-second will be unchanged.
CLOCK_HOUR_OF_AMPM - Returns a LocalTime with the specified clock-hour-of-am-pm. The AM/PM, minute-of-hour, second-of-minute and nano-of-second will be unchanged.
HOUR_OF_DAY - Returns a LocalTime with the specified hour-of-day. The minute-of-hour, second-of-minute and nano-of-second will be unchanged.
CLOCK_HOUR_OF_DAY - Returns a LocalTime with the specified clock-hour-of-day. The minute-of-hour, second-of-minute and nano-of-second will be unchanged.
AMPM_OF_DAY - Returns a LocalTime with the specified AM/PM. The hour-of-am-pm, minute-of-hour, second-of-minute and nano-of-second will be unchanged.

In all cases, if the new value is outside the valid range of values for the field then a DateTimeException will be thrown.

All other ChronoField instances will throw an UnsupportedTemporalTypeException.

If the field is not a ChronoField, then the result of this method is obtained by invoking TemporalField.adjustInto(Temporal, long) passing this as the argument. In this case, the field determines whether and how to adjust the instant.

This instance is immutable and unaffected by this method call.

Specified by:: with in interface Temporal
Parameters:: field - the field to set in the result, not null; newValue - the new value of the field in the result
Returns:: a LocalTime based on this with the specified field set, not null
Throws:: DateTimeException - if the field cannot be set; UnsupportedTemporalTypeException - if the field is not supported; ArithmeticException - if numeric overflow occurs

withHour

public LocalTime withHour(int hour)

Returns a copy of this LocalTime with the hour-of-day altered.

This instance is immutable and unaffected by this method call.

Parameters:: hour - the hour-of-day to set in the result, from 0 to 23
Returns:: a LocalTime based on this time with the requested hour, not null
Throws:: DateTimeException - if the hour value is invalid

withMinute

public LocalTime withMinute(int minute)

Returns a copy of this LocalTime with the minute-of-hour altered.

This instance is immutable and unaffected by this method call.

Parameters:: minute - the minute-of-hour to set in the result, from 0 to 59
Returns:: a LocalTime based on this time with the requested minute, not null
Throws:: DateTimeException - if the minute value is invalid

withSecond

public LocalTime withSecond(int second)

Returns a copy of this LocalTime with the second-of-minute altered.

This instance is immutable and unaffected by this method call.

Parameters:: second - the second-of-minute to set in the result, from 0 to 59
Returns:: a LocalTime based on this time with the requested second, not null
Throws:: DateTimeException - if the second value is invalid

withNano

public LocalTime withNano(int nanoOfSecond)

Returns a copy of this LocalTime with the nano-of-second altered.

This instance is immutable and unaffected by this method call.

Parameters:: nanoOfSecond - the nano-of-second to set in the result, from 0 to 999,999,999
Returns:: a LocalTime based on this time with the requested nanosecond, not null
Throws:: DateTimeException - if the nanos value is invalid

truncatedTo

public LocalTime truncatedTo(TemporalUnit unit)

Returns a copy of this LocalTime with the time truncated.

Truncation returns a copy of the original time with fields smaller than the specified unit set to zero. For example, truncating with the minutes unit will set the second-of-minute and nano-of-second field to zero.

The unit must have a duration that divides into the length of a standard day without remainder. This includes all supplied time units on ChronoUnit and DAYS. Other units throw an exception.

This instance is immutable and unaffected by this method call.

Parameters:: unit - the unit to truncate to, not null
Returns:: a LocalTime based on this time with the time truncated, not null
Throws:: DateTimeException - if unable to truncate; UnsupportedTemporalTypeException - if the unit is not supported

plus

public LocalTime plus(TemporalAmount amountToAdd)

Returns a copy of this time with the specified amount added.

This returns a LocalTime, based on this one, with the specified amount added. The amount is typically Duration but may be any other type implementing the TemporalAmount interface.

The calculation is delegated to the amount object by calling TemporalAmount.addTo(Temporal). The amount implementation is free to implement the addition in any way it wishes, however it typically calls back to plus(long, TemporalUnit). Consult the documentation of the amount implementation to determine if it can be successfully added.

This instance is immutable and unaffected by this method call.

Specified by:: plus in interface Temporal
Parameters:: amountToAdd - the amount to add, not null
Returns:: a LocalTime based on this time with the addition made, not null
Throws:: DateTimeException - if the addition cannot be made; ArithmeticException - if numeric overflow occurs

plus

public LocalTime plus(long amountToAdd,
                      TemporalUnit unit)

Returns a copy of this time with the specified amount added.

This returns a LocalTime, based on this one, with the amount in terms of the unit added. If it is not possible to add the amount, because the unit is not supported or for some other reason, an exception is thrown.

If the field is a ChronoUnit then the addition is implemented here. The supported fields behave as follows:

NANOS - Returns a LocalTime with the specified number of nanoseconds added. This is equivalent to plusNanos(long).
MICROS - Returns a LocalTime with the specified number of microseconds added. This is equivalent to plusNanos(long) with the amount multiplied by 1,000.
MILLIS - Returns a LocalTime with the specified number of milliseconds added. This is equivalent to plusNanos(long) with the amount multiplied by 1,000,000.
SECONDS - Returns a LocalTime with the specified number of seconds added. This is equivalent to plusSeconds(long).
MINUTES - Returns a LocalTime with the specified number of minutes added. This is equivalent to plusMinutes(long).
HOURS - Returns a LocalTime with the specified number of hours added. This is equivalent to plusHours(long).
HALF_DAYS - Returns a LocalTime with the specified number of half-days added. This is equivalent to plusHours(long) with the amount multiplied by 12.

All other ChronoUnit instances will throw an UnsupportedTemporalTypeException.

If the field is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.addTo(Temporal, long) passing this as the argument. In this case, the unit determines whether and how to perform the addition.

This instance is immutable and unaffected by this method call.

Specified by:: plus in interface Temporal
Parameters:: amountToAdd - the amount of the unit to add to the result, may be negative; unit - the unit of the amount to add, not null
Returns:: a LocalTime based on this time with the specified amount added, not null
Throws:: DateTimeException - if the addition cannot be made; UnsupportedTemporalTypeException - if the unit is not supported; ArithmeticException - if numeric overflow occurs

plusHours

public LocalTime plusHours(long hoursToAdd)

Returns a copy of this LocalTime with the specified number of hours added.

This adds the specified number of hours to this time, returning a new time. The calculation wraps around midnight.

This instance is immutable and unaffected by this method call.

Parameters:: hoursToAdd - the hours to add, may be negative
Returns:: a LocalTime based on this time with the hours added, not null

plusMinutes

public LocalTime plusMinutes(long minutesToAdd)

Returns a copy of this LocalTime with the specified number of minutes added.

This adds the specified number of minutes to this time, returning a new time. The calculation wraps around midnight.

This instance is immutable and unaffected by this method call.

Parameters:: minutesToAdd - the minutes to add, may be negative
Returns:: a LocalTime based on this time with the minutes added, not null

plusSeconds

public LocalTime plusSeconds(long secondstoAdd)

Returns a copy of this LocalTime with the specified number of seconds added.

This adds the specified number of seconds to this time, returning a new time. The calculation wraps around midnight.

This instance is immutable and unaffected by this method call.

Parameters:: secondstoAdd - the seconds to add, may be negative
Returns:: a LocalTime based on this time with the seconds added, not null

plusNanos

public LocalTime plusNanos(long nanosToAdd)

Returns a copy of this LocalTime with the specified number of nanoseconds added.

This adds the specified number of nanoseconds to this time, returning a new time. The calculation wraps around midnight.

This instance is immutable and unaffected by this method call.

Parameters:: nanosToAdd - the nanos to add, may be negative
Returns:: a LocalTime based on this time with the nanoseconds added, not null

minus

public LocalTime minus(TemporalAmount amountToSubtract)

Returns a copy of this time with the specified amount subtracted.

This returns a LocalTime, based on this one, with the specified amount subtracted. The amount is typically Duration but may be any other type implementing the TemporalAmount interface.

The calculation is delegated to the amount object by calling TemporalAmount.subtractFrom(Temporal). The amount implementation is free to implement the subtraction in any way it wishes, however it typically calls back to minus(long, TemporalUnit). Consult the documentation of the amount implementation to determine if it can be successfully subtracted.

This instance is immutable and unaffected by this method call.

Specified by:: minus in interface Temporal
Parameters:: amountToSubtract - the amount to subtract, not null
Returns:: a LocalTime based on this time with the subtraction made, not null
Throws:: DateTimeException - if the subtraction cannot be made; ArithmeticException - if numeric overflow occurs

minus

public LocalTime minus(long amountToSubtract,
                       TemporalUnit unit)

Returns a copy of this time with the specified amount subtracted.

This returns a LocalTime, based on this one, with the amount in terms of the unit subtracted. If it is not possible to subtract the amount, because the unit is not supported or for some other reason, an exception is thrown.

This method is equivalent to plus(long, TemporalUnit) with the amount negated. See that method for a full description of how addition, and thus subtraction, works.

This instance is immutable and unaffected by this method call.

Specified by:: minus in interface Temporal
Parameters:: amountToSubtract - the amount of the unit to subtract from the result, may be negative; unit - the unit of the amount to subtract, not null
Returns:: a LocalTime based on this time with the specified amount subtracted, not null
Throws:: DateTimeException - if the subtraction cannot be made; UnsupportedTemporalTypeException - if the unit is not supported; ArithmeticException - if numeric overflow occurs

minusHours

public LocalTime minusHours(long hoursToSubtract)

Returns a copy of this LocalTime with the specified number of hours subtracted.

This subtracts the specified number of hours from this time, returning a new time. The calculation wraps around midnight.

This instance is immutable and unaffected by this method call.

Parameters:: hoursToSubtract - the hours to subtract, may be negative
Returns:: a LocalTime based on this time with the hours subtracted, not null

minusMinutes

public LocalTime minusMinutes(long minutesToSubtract)

Returns a copy of this LocalTime with the specified number of minutes subtracted.

This subtracts the specified number of minutes from this time, returning a new time. The calculation wraps around midnight.

This instance is immutable and unaffected by this method call.

Parameters:: minutesToSubtract - the minutes to subtract, may be negative
Returns:: a LocalTime based on this time with the minutes subtracted, not null

minusSeconds

public LocalTime minusSeconds(long secondsToSubtract)

Returns a copy of this LocalTime with the specified number of seconds subtracted.

This subtracts the specified number of seconds from this time, returning a new time. The calculation wraps around midnight.

This instance is immutable and unaffected by this method call.

Parameters:: secondsToSubtract - the seconds to subtract, may be negative
Returns:: a LocalTime based on this time with the seconds subtracted, not null

minusNanos

public LocalTime minusNanos(long nanosToSubtract)

Returns a copy of this LocalTime with the specified number of nanoseconds subtracted.

This subtracts the specified number of nanoseconds from this time, returning a new time. The calculation wraps around midnight.

This instance is immutable and unaffected by this method call.

Parameters:: nanosToSubtract - the nanos to subtract, may be negative
Returns:: a LocalTime based on this time with the nanoseconds subtracted, not null

query

public <R> R query(TemporalQuery<R> query)

Queries this time using the specified query.

This queries this time using the specified query strategy object. The TemporalQuery object defines the logic to be used to obtain the result. Read the documentation of the query to understand what the result of this method will be.

The result of this method is obtained by invoking the TemporalQuery.queryFrom(TemporalAccessor) method on the specified query passing this as the argument.

Specified by:: query in interface TemporalAccessor
Type Parameters:: R - the type of the result
Parameters:: query - the query to invoke, not null
Returns:: the query result, null may be returned (defined by the query)
Throws:: DateTimeException - if unable to query (defined by the query); ArithmeticException - if numeric overflow occurs (defined by the query)

adjustInto

public Temporal adjustInto(Temporal temporal)

Adjusts the specified temporal object to have the same time as this object.

This returns a temporal object of the same observable type as the input with the time changed to be the same as this.

The adjustment is equivalent to using Temporal.with(TemporalField, long) passing ChronoField.NANO_OF_DAY as the field.

In most cases, it is clearer to reverse the calling pattern by using Temporal.with(TemporalAdjuster):

// these two lines are equivalent, but the second approach is recommended
   temporal = thisLocalTime.adjustInto(temporal);
   temporal = temporal.with(thisLocalTime);

This instance is immutable and unaffected by this method call.

Specified by:: adjustInto in interface TemporalAdjuster
Parameters:: temporal - the target object to be adjusted, not null
Returns:: the adjusted object, not null
Throws:: DateTimeException - if unable to make the adjustment; ArithmeticException - if numeric overflow occurs

until

public long until(Temporal endExclusive,
                  TemporalUnit unit)

Calculates the amount of time until another time in terms of the specified unit.

This calculates the amount of time between two LocalTime objects in terms of a single TemporalUnit. The start and end points are this and the specified time. The result will be negative if the end is before the start. The Temporal passed to this method is converted to a LocalTime using from(TemporalAccessor). For example, the amount in hours between two times can be calculated using startTime.until(endTime, HOURS).

The calculation returns a whole number, representing the number of complete units between the two times. For example, the amount in hours between 11:30 and 13:29 will only be one hour as it is one minute short of two hours.

There are two equivalent ways of using this method. The first is to invoke this method. The second is to use TemporalUnit.between(Temporal, Temporal):

// these two lines are equivalent
   amount = start.until(end, MINUTES);
   amount = MINUTES.between(start, end);

The choice should be made based on which makes the code more readable.

The calculation is implemented in this method for ChronoUnit. The units NANOS, MICROS, MILLIS, SECONDS, MINUTES, HOURS and HALF_DAYS are supported. Other ChronoUnit values will throw an exception.

If the unit is not a ChronoUnit, then the result of this method is obtained by invoking TemporalUnit.between(Temporal, Temporal) passing this as the first argument and the converted input temporal as the second argument.

This instance is immutable and unaffected by this method call.

Specified by:: until in interface Temporal
Parameters:: endExclusive - the end time, exclusive, which is converted to a LocalTime, not null; unit - the unit to measure the amount in, not null
Returns:: the amount of time between this time and the end time
Throws:: DateTimeException - if the amount cannot be calculated, or the end temporal cannot be converted to a LocalTime; UnsupportedTemporalTypeException - if the unit is not supported; ArithmeticException - if numeric overflow occurs

format

public String format(DateTimeFormatter formatter)

Formats this time using the specified formatter.

This time will be passed to the formatter to produce a string.

Parameters:: formatter - the formatter to use, not null
Returns:: the formatted time string, not null
Throws:: DateTimeException - if an error occurs during printing

atDate

public LocalDateTime atDate(LocalDate date)

Combines this time with a date to create a LocalDateTime.

This returns a LocalDateTime formed from this time at the specified date. All possible combinations of date and time are valid.

Parameters:: date - the date to combine with, not null
Returns:: the local date-time formed from this time and the specified date, not null

atOffset

public OffsetTime atOffset(ZoneOffset offset)

Combines this time with an offset to create an OffsetTime.

This returns an OffsetTime formed from this time at the specified offset. All possible combinations of time and offset are valid.

Parameters:: offset - the offset to combine with, not null
Returns:: the offset time formed from this time and the specified offset, not null

toSecondOfDay

public int toSecondOfDay()

Extracts the time as seconds of day, from 0 to 24 * 60 * 60 - 1.

Returns:: the second-of-day equivalent to this time

toNanoOfDay

public long toNanoOfDay()

Extracts the time as nanos of day, from 0 to 24 * 60 * 60 * 1,000,000,000 - 1.

Returns:: the nano of day equivalent to this time

compareTo

public int compareTo(LocalTime other)

Compares this time to another time.

The comparison is based on the time-line position of the local times within a day. It is "consistent with equals", as defined by Comparable.

Specified by:: compareTo in interface Comparable<LocalTime>
Parameters:: other - the other time to compare to, not null
Returns:: the comparator value, negative if less, positive if greater
Throws:: NullPointerException - if other is null

isAfter

public boolean isAfter(LocalTime other)

Checks if this time is after the specified time.

The comparison is based on the time-line position of the time within a day.

Parameters:: other - the other time to compare to, not null
Returns:: true if this is after the specified time
Throws:: NullPointerException - if other is null

isBefore

public boolean isBefore(LocalTime other)

Checks if this time is before the specified time.

The comparison is based on the time-line position of the time within a day.

Parameters:: other - the other time to compare to, not null
Returns:: true if this point is before the specified time
Throws:: NullPointerException - if other is null

equals

public boolean equals(Object obj)

Checks if this time is equal to another time.

The comparison is based on the time-line position of the time within a day.

Only objects of type LocalTime are compared, other types return false. To compare the date of two TemporalAccessor instances, use ChronoField.NANO_OF_DAY as a comparator.

Overrides:: equals in class Object
Parameters:: obj - the object to check, null returns false
Returns:: true if this is equal to the other time
See Also:: Object.hashCode(), HashMap

hashCode

public int hashCode()

A hash code for this time.

Overrides:: hashCode in class Object
Returns:: a suitable hash code
See Also:: Object.equals(java.lang.Object), System.identityHashCode(java.lang.Object)

toString

public String toString()

Outputs this time as a String, such as 10:15.

The output will be one of the following ISO-8601 formats:

HH:mm
HH:mm:ss
HH:mm:ss.SSS
HH:mm:ss.SSSSSS
HH:mm:ss.SSSSSSSSS

The format used will be the shortest that outputs the full value of the time where the omitted parts are implied to be zero.

Overrides:: toString in class Object
Returns:: a string representation of this time, not null

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