Module java.base
Package java.time

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
See Also:
Serialized Form
  • Field Summary

    Fields
    Modifier and Type Field Description
    static LocalTime MAX
    The maximum supported LocalTime, '23:59:59.999999999'.
    static LocalTime MIDNIGHT
    The time of midnight at the start of the day, '00:00'.
    static LocalTime MIN
    The minimum supported LocalTime, '00:00'.
    static LocalTime NOON
    The time of noon in the middle of the day, '12:00'.
  • Method Summary

    Modifier and Type Method Description
    Temporal adjustInto​(Temporal temporal)
    Adjusts the specified temporal object to have the same time as this object.
    LocalDateTime atDate​(LocalDate date)
    Combines this time with a date to create a LocalDateTime.
    OffsetTime atOffset​(ZoneOffset offset)
    Combines this time with an offset to create an OffsetTime.
    int compareTo​(LocalTime other)
    Compares this time to another time.
    boolean equals​(Object obj)
    Checks if this time is equal to another time.
    String format​(DateTimeFormatter formatter)
    Formats this time using the specified formatter.
    static LocalTime from​(TemporalAccessor temporal)
    Obtains an instance of LocalTime from a temporal object.
    int get​(TemporalField field)
    Gets the value of the specified field from this time as an int.
    int getHour()
    Gets the hour-of-day field.
    long getLong​(TemporalField field)
    Gets the value of the specified field from this time as a long.
    int getMinute()
    Gets the minute-of-hour field.
    int getNano()
    Gets the nano-of-second field.
    int getSecond()
    Gets the second-of-minute field.
    int hashCode()
    A hash code for this time.
    boolean isAfter​(LocalTime other)
    Checks if this time is after the specified time.
    boolean isBefore​(LocalTime other)
    Checks if this time is before the specified time.
    boolean isSupported​(TemporalField field)
    Checks if the specified field is supported.
    boolean isSupported​(TemporalUnit unit)
    Checks if the specified unit is supported.
    LocalTime minus​(long amountToSubtract, TemporalUnit unit)
    Returns a copy of this time with the specified amount subtracted.
    LocalTime minus​(TemporalAmount amountToSubtract)
    Returns a copy of this time with the specified amount subtracted.
    LocalTime minusHours​(long hoursToSubtract)
    Returns a copy of this LocalTime with the specified number of hours subtracted.
    LocalTime minusMinutes​(long minutesToSubtract)
    Returns a copy of this LocalTime with the specified number of minutes subtracted.
    LocalTime minusNanos​(long nanosToSubtract)
    Returns a copy of this LocalTime with the specified number of nanoseconds subtracted.
    LocalTime minusSeconds​(long secondsToSubtract)
    Returns a copy of this LocalTime with the specified number of seconds subtracted.
    static LocalTime now()
    Obtains the current time from the system clock in the default time-zone.
    static LocalTime now​(Clock clock)
    Obtains the current time from the specified clock.
    static LocalTime now​(ZoneId zone)
    Obtains the current time from the system clock in the specified time-zone.
    static LocalTime of​(int hour, int minute)
    Obtains an instance of LocalTime from an hour and minute.
    static LocalTime of​(int hour, int minute, int second)
    Obtains an instance of LocalTime from an hour, minute and second.
    static LocalTime of​(int hour, int minute, int second, int nanoOfSecond)
    Obtains an instance of LocalTime from an hour, minute, second and nanosecond.
    static LocalTime ofInstant​(Instant instant, ZoneId zone)
    Obtains an instance of LocalTime from an Instant and zone ID.
    static LocalTime ofNanoOfDay​(long nanoOfDay)
    Obtains an instance of LocalTime from a nanos-of-day value.
    static LocalTime ofSecondOfDay​(long secondOfDay)
    Obtains an instance of LocalTime from a second-of-day value.
    static LocalTime parse​(CharSequence text)
    Obtains an instance of LocalTime from a text string such as 10:15.
    static LocalTime parse​(CharSequence text, DateTimeFormatter formatter)
    Obtains an instance of LocalTime from a text string using a specific formatter.
    LocalTime plus​(long amountToAdd, TemporalUnit unit)
    Returns a copy of this time with the specified amount added.
    LocalTime plus​(TemporalAmount amountToAdd)
    Returns a copy of this time with the specified amount added.
    LocalTime plusHours​(long hoursToAdd)
    Returns a copy of this LocalTime with the specified number of hours added.
    LocalTime plusMinutes​(long minutesToAdd)
    Returns a copy of this LocalTime with the specified number of minutes added.
    LocalTime plusNanos​(long nanosToAdd)
    Returns a copy of this LocalTime with the specified number of nanoseconds added.
    LocalTime plusSeconds​(long secondstoAdd)
    Returns a copy of this LocalTime with the specified number of seconds added.
    <R> R query​(TemporalQuery<R> query)
    Queries this time using the specified query.
    ValueRange range​(TemporalField field)
    Gets the range of valid values for the specified field.
    long toEpochSecond​(LocalDate date, ZoneOffset offset)
    Converts this LocalTime to the number of seconds since the epoch of 1970-01-01T00:00:00Z.
    long toNanoOfDay()
    Extracts the time as nanos of day, from 0 to 24 * 60 * 60 * 1,000,000,000 - 1.
    int toSecondOfDay()
    Extracts the time as seconds of day, from 0 to 24 * 60 * 60 - 1.
    String toString()
    Outputs this time as a String, such as 10:15.
    LocalTime truncatedTo​(TemporalUnit unit)
    Returns a copy of this LocalTime with the time truncated.
    long until​(Temporal endExclusive, TemporalUnit unit)
    Calculates the amount of time until another time in terms of the specified unit.
    LocalTime with​(TemporalAdjuster adjuster)
    Returns an adjusted copy of this time.
    LocalTime with​(TemporalField field, long newValue)
    Returns a copy of this time with the specified field set to a new value.
    LocalTime withHour​(int hour)
    Returns a copy of this LocalTime with the hour-of-day altered.
    LocalTime withMinute​(int minute)
    Returns a copy of this LocalTime with the minute-of-hour altered.
    LocalTime withNano​(int nanoOfSecond)
    Returns a copy of this LocalTime with the nano-of-second altered.
    LocalTime withSecond​(int second)
    Returns a copy of this LocalTime with the second-of-minute altered.

    Methods declared in class java.lang.Object

    clone, finalize, getClass, notify, notifyAll, wait, wait, wait
  • Field Details

    • 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'.
  • Method Details

    • 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
    • ofInstant

      public static LocalTime ofInstant​(Instant instant, ZoneId zone)
      Obtains an instance of LocalTime from an Instant and zone ID.

      This creates a local time based on the specified instant. First, the offset from UTC/Greenwich is obtained using the zone ID and instant, which is simple as there is only one valid offset for each instant. Then, the instant and offset are used to calculate the local time.

      Parameters:
      instant - the instant to create the time from, not null
      zone - the time-zone, which may be an offset, not null
      Returns:
      the local time, not null
      Since:
      9
    • 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 an UnsupportedTemporalTypeException. 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.

      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:
      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
    • toEpochSecond

      public long toEpochSecond​(LocalDate date, ZoneOffset offset)
      Converts this LocalTime to the number of seconds since the epoch of 1970-01-01T00:00:00Z.

      This combines this local time with the specified date and offset to calculate the epoch-second value, which is the number of elapsed seconds from 1970-01-01T00:00:00Z. Instants on the time-line after the epoch are positive, earlier are negative.

      Parameters:
      date - the local date, not null
      offset - the zone offset, not null
      Returns:
      the number of seconds since the epoch of 1970-01-01T00:00:00Z, may be negative
      Since:
      9
    • 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
    • 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
    • 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
    • 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