Module java.base
Package java.time

# Class OffsetTime

java.lang.Object
java.time.OffsetTime

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

public final class OffsetTime extends Object implements Temporal, TemporalAdjuster, Comparable<OffsetTime>, Serializable
A time with an offset from UTC/Greenwich in the ISO-8601 calendar system, such as `10:15:30+01:00`.

`OffsetTime` is an immutable date-time object that represents a time, often viewed as hour-minute-second-offset. This class stores all time fields, to a precision of nanoseconds, as well as a zone offset. For example, the value "13:45:30.123456789+02:00" can be stored in an `OffsetTime`.

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:
  - Serialized Form

## Field Summary

Fields
Modifier and Type
Field
Description
`static final OffsetTime`
`MAX`
The maximum supported `OffsetTime`, '23:59:59.999999999-18:00'.
`static final OffsetTime`
`MIN`
The minimum supported `OffsetTime`, '00:00:00+18:00'.

## Method Summary

Modifier and Type
Method
Description
`Temporal`
`adjustInto(Temporal temporal)`
Adjusts the specified temporal object to have the same offset and time as this object.
`OffsetDateTime`
`atDate(LocalDate date)`
Combines this time with a date to create an `OffsetDateTime`.
`int`
`compareTo(OffsetTime other)`
Compares this `OffsetTime` 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 OffsetTime`
`from(TemporalAccessor temporal)`
Obtains an instance of `OffsetTime` 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.
`ZoneOffset`
`getOffset()`
Gets the zone offset, such as '+01:00'.
`int`
`getSecond()`
Gets the second-of-minute field.
`int`
`hashCode()`
A hash code for this time.
`boolean`
`isAfter(OffsetTime other)`
Checks if the instant of this `OffsetTime` is after that of the specified time applying both times to a common date.
`boolean`
`isBefore(OffsetTime other)`
Checks if the instant of this `OffsetTime` is before that of the specified time applying both times to a common date.
`boolean`
`isEqual(OffsetTime other)`
Checks if the instant of this `OffsetTime` is equal to that of the specified time applying both times to a common date.
`boolean`
`isSupported(TemporalField field)`
Checks if the specified field is supported.
`boolean`
`isSupported(TemporalUnit unit)`
Checks if the specified unit is supported.
`OffsetTime`
`minus(long amountToSubtract, TemporalUnit unit)`
Returns a copy of this time with the specified amount subtracted.
`OffsetTime`
`minus(TemporalAmount amountToSubtract)`
Returns a copy of this time with the specified amount subtracted.
`OffsetTime`
`minusHours(long hours)`
Returns a copy of this `OffsetTime` with the specified number of hours subtracted.
`OffsetTime`
`minusMinutes(long minutes)`
Returns a copy of this `OffsetTime` with the specified number of minutes subtracted.
`OffsetTime`
`minusNanos(long nanos)`
Returns a copy of this `OffsetTime` with the specified number of nanoseconds subtracted.
`OffsetTime`
`minusSeconds(long seconds)`
Returns a copy of this `OffsetTime` with the specified number of seconds subtracted.
`static OffsetTime`
`now()`
Obtains the current time from the system clock in the default time-zone.
`static OffsetTime`
`now(Clock clock)`
Obtains the current time from the specified clock.
`static OffsetTime`
`now(ZoneId zone)`
Obtains the current time from the system clock in the specified time-zone.
`static OffsetTime`
`of(int hour, int minute, int second, int nanoOfSecond, ZoneOffset offset)`
Obtains an instance of `OffsetTime` from an hour, minute, second and nanosecond.
`static OffsetTime`
`of(LocalTime time, ZoneOffset offset)`
Obtains an instance of `OffsetTime` from a local time and an offset.
`static OffsetTime`
`ofInstant(Instant instant, ZoneId zone)`
Obtains an instance of `OffsetTime` from an `Instant` and zone ID.
`static OffsetTime`
`parse(CharSequence text)`
Obtains an instance of `OffsetTime` from a text string such as `10:15:30+01:00`.
`static OffsetTime`
`parse(CharSequence text, DateTimeFormatter formatter)`
Obtains an instance of `OffsetTime` from a text string using a specific formatter.
`OffsetTime`
`plus(long amountToAdd, TemporalUnit unit)`
Returns a copy of this time with the specified amount added.
`OffsetTime`
`plus(TemporalAmount amountToAdd)`
Returns a copy of this time with the specified amount added.
`OffsetTime`
`plusHours(long hours)`
Returns a copy of this `OffsetTime` with the specified number of hours added.
`OffsetTime`
`plusMinutes(long minutes)`
Returns a copy of this `OffsetTime` with the specified number of minutes added.
`OffsetTime`
`plusNanos(long nanos)`
Returns a copy of this `OffsetTime` with the specified number of nanoseconds added.
`OffsetTime`
`plusSeconds(long seconds)`
Returns a copy of this `OffsetTime` 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)`
Converts this `OffsetTime` to the number of seconds since the epoch of 1970-01-01T00:00:00Z.
`LocalTime`
`toLocalTime()`
Gets the `LocalTime` part of this date-time.
`String`
`toString()`
Outputs this time as a `String`, such as `10:15:30+01:00`.
`OffsetTime`
`truncatedTo(TemporalUnit unit)`
Returns a copy of this `OffsetTime` with the time truncated.
`long`
`until(Temporal endExclusive, TemporalUnit unit)`
Calculates the amount of time until another time in terms of the specified unit.
`OffsetTime`
`with(TemporalAdjuster adjuster)`
Returns an adjusted copy of this time.
`OffsetTime`
`with(TemporalField field, long newValue)`
Returns a copy of this time with the specified field set to a new value.
`OffsetTime`
`withHour(int hour)`
Returns a copy of this `OffsetTime` with the hour-of-day altered.
`OffsetTime`
`withMinute(int minute)`
Returns a copy of this `OffsetTime` with the minute-of-hour altered.
`OffsetTime`
`withNano(int nanoOfSecond)`
Returns a copy of this `OffsetTime` with the nano-of-second altered.
`OffsetTime`
`withOffsetSameInstant(ZoneOffset offset)`
Returns a copy of this `OffsetTime` with the specified offset ensuring that the result is at the same instant on an implied day.
`OffsetTime`
`withOffsetSameLocal(ZoneOffset offset)`
Returns a copy of this `OffsetTime` with the specified offset ensuring that the result has the same local time.
`OffsetTime`
`withSecond(int second)`
Returns a copy of this `OffsetTime` 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 OffsetTime MIN
The minimum supported `OffsetTime`, '00:00:00+18:00'. This is the time of midnight at the start of the day in the maximum offset (larger offsets are earlier on the time-line). This combines `LocalTime.MIN` and `ZoneOffset.MAX`. This could be used by an application as a "far past" date.

### MAX

public static final OffsetTime MAX
The maximum supported `OffsetTime`, '23:59:59.999999999-18:00'. This is the time just before midnight at the end of the day in the minimum offset (larger negative offsets are later on the time-line). This combines `LocalTime.MAX` and `ZoneOffset.MIN`. This could be used by an application as a "far future" date.

## Method Details

### now

public static OffsetTime 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. The offset will be calculated from the time-zone in the clock.

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 OffsetTime 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. The offset will be calculated from the specified 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 OffsetTime now(Clock clock)
Obtains the current time from the specified clock.

This will query the specified clock to obtain the current time. The offset will be calculated from the time-zone in the clock.

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 OffsetTime of(LocalTime time, ZoneOffset offset)
Obtains an instance of `OffsetTime` from a local time and an offset.

Parameters:
  `time` - the local time, not null
  `offset` - the zone offset, not null
Returns:
  the offset time, not null

### of

public static OffsetTime of(int hour, int minute, int second, int nanoOfSecond, ZoneOffset offset)
Obtains an instance of `OffsetTime` from an hour, minute, second and nanosecond.

This creates an offset time with the four specified fields.

This method exists primarily for writing test cases. Non test-code will typically use other methods to create an offset time. `LocalTime` has two additional convenience variants of the equivalent factory method taking fewer arguments. They are not provided here to reduce the footprint of the API.

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
  `offset` - the zone offset, not null
Returns:
  the offset time, not null
Throws:
  `DateTimeException` - if the value of any field is out of range

### ofInstant

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

This creates an offset time with the same instant as that specified. Finding the offset from UTC/Greenwich is simple as there is only one valid offset for each instant.

The date component of the instant is dropped during the conversion. This means that the conversion can never fail due to the instant being out of the valid range of dates.

Parameters:
  `instant` - the instant to create the time from, not null
  `zone` - the time-zone, which may be an offset, not null
Returns:
  the offset time, not null

### from

public static OffsetTime from(TemporalAccessor temporal)
Obtains an instance of `OffsetTime` from a temporal object.

This obtains an offset 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 `OffsetTime`.

The conversion extracts and combines the `ZoneOffset` and the `LocalTime` from the temporal object. Implementations are permitted to perform optimizations such as accessing those fields that are equivalent to the relevant objects.

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

Parameters:
  `temporal` - the temporal object to convert, not null
Returns:
  the offset time, not null
Throws:
  `DateTimeException` - if unable to convert to an `OffsetTime`

### parse

public static OffsetTime parse(CharSequence text)
Obtains an instance of `OffsetTime` from a text string such as `10:15:30+01:00`.

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

Parameters:
  `text` - the text to parse such as "10:15:30+01:00", not null
Returns:
  the parsed local time, not null
Throws:
  `DateTimeParseException` - if the text cannot be parsed

### parse

public static OffsetTime parse(CharSequence text, DateTimeFormatter formatter)
Obtains an instance of `OffsetTime` 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 offset 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`
- `OFFSET_SECONDS`

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 offset-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

### getOffset

public ZoneOffset getOffset()
Gets the zone offset, such as '+01:00'.

This is the offset of the local time from UTC/Greenwich.

Returns:
  the zone offset, not null

### withOffsetSameLocal

public OffsetTime withOffsetSameLocal(ZoneOffset offset)
Returns a copy of this `OffsetTime` with the specified offset ensuring that the result has the same local time.

This method returns an object with the same `LocalTime` and the specified `ZoneOffset`. No calculation is needed or performed. For example, if this time represents `10:30+02:00` and the offset specified is `+03:00`, then this method will return `10:30+03:00`.

To take into account the difference between the offsets, and adjust the time fields, use `withOffsetSameInstant(java.time.ZoneOffset)`.

This instance is immutable and unaffected by this method call.

Parameters:
  `offset` - the zone offset to change to, not null
Returns:
  an `OffsetTime` based on this time with the requested offset, not null

### withOffsetSameInstant

public OffsetTime withOffsetSameInstant(ZoneOffset offset)
Returns a copy of this `OffsetTime` with the specified offset ensuring that the result is at the same instant on an implied day.

This method returns an object with the specified `ZoneOffset` and a `LocalTime` adjusted by the difference between the two offsets. This will result in the old and new objects representing the same instant on an implied day. This is useful for finding the local time in a different offset. For example, if this time represents `10:30+02:00` and the offset specified is `+03:00`, then this method will return `11:30+03:00`.

To change the offset without adjusting the local time use `withOffsetSameLocal(java.time.ZoneOffset)`.

This instance is immutable and unaffected by this method call.

Parameters:
  `offset` - the zone offset to change to, not null
Returns:
  an `OffsetTime` based on this time with the requested offset, not null

### toLocalTime

public LocalTime toLocalTime()
Gets the `LocalTime` part of this date-time.

This returns a `LocalTime` with the same hour, minute, second and nanosecond as this date-time.

Returns:
  the time part of this date-time, not null

### 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 OffsetTime with(TemporalAdjuster adjuster)
Returns an adjusted copy of this time.

This returns an `OffsetTime`, 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 classes `LocalTime` and `ZoneOffset` implement `TemporalAdjuster`, thus this method can be used to change the time or offset:

      result = offsetTime.with(time);
      result = offsetTime.with(offset);

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:
  an `OffsetTime` based on `this` with the adjustment made, not null
Throws:
  `DateTimeException` - if the adjustment cannot be made
  `ArithmeticException` - if numeric overflow occurs

### with

public OffsetTime with(TemporalField field, long newValue)
Returns a copy of this time with the specified field set to a new value.

This returns an `OffsetTime`, 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 `OFFSET_SECONDS` field will return a time with the specified offset. The local time is unaltered. If the new offset value is outside the valid range then a `DateTimeException` will be thrown.

The other `supported fields` will behave as per the matching method on `LocalTime.with(TemporalField, long)` LocalTime}. In this case, the offset is not part of the calculation and will be unchanged.

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:
  an `OffsetTime` 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 OffsetTime withHour(int hour)
Returns a copy of this `OffsetTime` with the hour-of-day altered.

The offset does not affect the calculation and will be the same in the result.

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:
  an `OffsetTime` based on this time with the requested hour, not null
Throws:
  `DateTimeException` - if the hour value is invalid

### withMinute

public OffsetTime withMinute(int minute)
Returns a copy of this `OffsetTime` with the minute-of-hour altered.

The offset does not affect the calculation and will be the same in the result.

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:
  an `OffsetTime` based on this time with the requested minute, not null
Throws:
  `DateTimeException` - if the minute value is invalid

### withSecond

public OffsetTime withSecond(int second)
Returns a copy of this `OffsetTime` with the second-of-minute altered.

The offset does not affect the calculation and will be the same in the result.

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:
  an `OffsetTime` based on this time with the requested second, not null
Throws:
  `DateTimeException` - if the second value is invalid

### withNano

public OffsetTime withNano(int nanoOfSecond)
Returns a copy of this `OffsetTime` with the nano-of-second altered.

The offset does not affect the calculation and will be the same in the result.

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:
  an `OffsetTime` based on this time with the requested nanosecond, not null
Throws:
  `DateTimeException` - if the nanos value is invalid

### truncatedTo

public OffsetTime truncatedTo(TemporalUnit unit)
Returns a copy of this `OffsetTime` 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.

The offset does not affect the calculation and will be the same in the result.

This instance is immutable and unaffected by this method call.

Parameters:
  `unit` - the unit to truncate to, not null
Returns:
  an `OffsetTime` 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 OffsetTime plus(TemporalAmount amountToAdd)
Returns a copy of this time with the specified amount added.

This returns an `OffsetTime`, 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:
  an `OffsetTime` 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 OffsetTime plus(long amountToAdd, TemporalUnit unit)
Returns a copy of this time with the specified amount added.

This returns an `OffsetTime`, 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 by `LocalTime.plus(long, TemporalUnit)`. The offset is not part of the calculation and will be unchanged in the result.

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:
  an `OffsetTime` 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 OffsetTime plusHours(long hours)
Returns a copy of this `OffsetTime` 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:
  `hours` - the hours to add, may be negative
Returns:
  an `OffsetTime` based on this time with the hours added, not null

### plusMinutes

public OffsetTime plusMinutes(long minutes)
Returns a copy of this `OffsetTime` 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:
  `minutes` - the minutes to add, may be negative
Returns:
  an `OffsetTime` based on this time with the minutes added, not null

### plusSeconds

public OffsetTime plusSeconds(long seconds)
Returns a copy of this `OffsetTime` 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:
  `seconds` - the seconds to add, may be negative
Returns:
  an `OffsetTime` based on this time with the seconds added, not null

### plusNanos

public OffsetTime plusNanos(long nanos)
Returns a copy of this `OffsetTime` 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:
  `nanos` - the nanos to add, may be negative
Returns:
  an `OffsetTime` based on this time with the nanoseconds added, not null

### minus

public OffsetTime minus(TemporalAmount amountToSubtract)
Returns a copy of this time with the specified amount subtracted.

This returns an `OffsetTime`, 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:
  an `OffsetTime` 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 OffsetTime minus(long amountToSubtract, TemporalUnit unit)
Returns a copy of this time with the specified amount subtracted.

This returns an `OffsetTime`, 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:
  an `OffsetTime` 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 OffsetTime minusHours(long hours)
Returns a copy of this `OffsetTime` 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:
  `hours` - the hours to subtract, may be negative
Returns:
  an `OffsetTime` based on this time with the hours subtracted, not null

### minusMinutes

public OffsetTime minusMinutes(long minutes)
Returns a copy of this `OffsetTime` 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:
  `minutes` - the minutes to subtract, may be negative
Returns:
  an `OffsetTime` based on this time with the minutes subtracted, not null

### minusSeconds

public OffsetTime minusSeconds(long seconds)
Returns a copy of this `OffsetTime` 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:
  `seconds` - the seconds to subtract, may be negative
Returns:
  an `OffsetTime` based on this time with the seconds subtracted, not null

### minusNanos

public OffsetTime minusNanos(long nanos)
Returns a copy of this `OffsetTime` 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:
  `nanos` - the nanos to subtract, may be negative
Returns:
  an `OffsetTime` 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 offset and time as this object.

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

The adjustment is equivalent to using `Temporal.with(TemporalField, long)` twice, passing `ChronoField.NANO_OF_DAY` and `ChronoField.OFFSET_SECONDS` as the fields.

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 = thisOffsetTime.adjustInto(temporal);
       temporal = temporal.with(thisOffsetTime);

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 `OffsetTime` 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. For example, the amount in hours between two times can be calculated using `startTime.until(endTime, HOURS)`.

The `Temporal` passed to this method is converted to a `OffsetTime` using `from(TemporalAccessor)`. If the offset differs between the two times, then the specified end time is normalized to have the same offset as this time.

The calculation returns a whole number, representing the number of complete units between the two times. For example, the amount in hours between 11:30Z and 13:29Z 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 an `OffsetTime`, 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 an `OffsetTime`
  `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 OffsetDateTime atDate(LocalDate date)
Combines this time with a date to create an `OffsetDateTime`.

This returns an `OffsetDateTime` formed from this time and the specified date. All possible combinations of date and time are valid.

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

### toEpochSecond

public long toEpochSecond(LocalDate date)
Converts this `OffsetTime` to the number of seconds since the epoch of 1970-01-01T00:00:00Z.

This combines this offset time with the specified date 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 localdate, 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(OffsetTime other)
Compares this `OffsetTime` to another time.

The comparison is based first on the UTC equivalent instant, then on the local time. It is "consistent with equals", as defined by `Comparable`.

For example, the following is the comparator order:

1. `10:30+01:00`
2. `11:00+01:00`
3. `12:00+02:00`
4. `11:30+01:00`
5. `12:00+01:00`
6. `12:30+01:00`

Values #2 and #3 represent the same instant on the time-line. When two values represent the same instant, the local time is compared to distinguish them. This step is needed to make the ordering consistent with `equals()`.

To compare the underlying local time of two `TemporalAccessor` instances, use `ChronoField.NANO_OF_DAY` as a comparator.

Specified by:
  `compareTo` in interface `Comparable<OffsetTime>`
Parameters:
  `other` - the other time to compare to, not null
Returns:
  the comparator value, that is the comparison of the UTC equivalent `other` instant, if they are not equal, and if the UTC equivalent `other` instant is equal, the comparison of this local time with `other` local time
See Also:
  - `isBefore(java.time.OffsetTime)`
  - `isAfter(java.time.OffsetTime)`

### isAfter

public boolean isAfter(OffsetTime other)
Checks if the instant of this `OffsetTime` is after that of the specified time applying both times to a common date.

This method differs from the comparison in `compareTo(java.time.OffsetTime)` in that it only compares the instant of the time. This is equivalent to converting both times to an instant using the same date and comparing the instants.

Parameters:
  `other` - the other time to compare to, not null
Returns:
  true if this is after the instant of the specified time

### isBefore

public boolean isBefore(OffsetTime other)
Checks if the instant of this `OffsetTime` is before that of the specified time applying both times to a common date.

This method differs from the comparison in `compareTo(java.time.OffsetTime)` in that it only compares the instant of the time. This is equivalent to converting both times to an instant using the same date and comparing the instants.

Parameters:
  `other` - the other time to compare to, not null
Returns:
  true if this is before the instant of the specified time

### isEqual

public boolean isEqual(OffsetTime other)
Checks if the instant of this `OffsetTime` is equal to that of the specified time applying both times to a common date.

This method differs from the comparison in `compareTo(java.time.OffsetTime)` and `equals(java.lang.Object)` in that it only compares the instant of the time. This is equivalent to converting both times to an instant using the same date and comparing the instants.

Parameters:
  `other` - the other time to compare to, not null
Returns:
  true if this is equal to the instant of the specified time

### equals

public boolean equals(Object obj)
Checks if this time is equal to another time.

The comparison is based on the local-time and the offset. To compare for the same instant on the time-line, use `isEqual(OffsetTime)`.

Only objects of type `OffsetTime` are compared, other types return false. To compare the underlying local time 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 `10:15:30+01:00`.

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

- `HH:mmXXXXX`
- `HH:mm:ssXXXXX`
- `HH:mm:ss.SSSXXXXX`
- `HH:mm:ss.SSSSSSXXXXX`
- `HH:mm:ss.SSSSSSSSSXXXXX`

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