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# OffsetDateTime

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

java.lang.Object
↳ | java.time.OffsetDateTime

A date-time with an offset from UTC/Greenwich in the ISO-8601 calendar system, such as `2007-12-03T10:15:30+01:00`.

`OffsetDateTime` is an immutable representation of a date-time with an offset. This class stores all date and time fields, to a precision of nanoseconds, as well as the offset from UTC/Greenwich. For example, the value "2nd October 2007 at 13:45.30.123456789 +02:00" can be stored in an `OffsetDateTime`.

`OffsetDateTime`, `ZonedDateTime` and `Instant` all store an instant on the time-line to nanosecond precision. `Instant` is the simplest, simply representing the instant. `OffsetDateTime` adds to the instant the offset from UTC/Greenwich, which allows the local date-time to be obtained. `ZonedDateTime` adds full time-zone rules.

It is intended that `ZonedDateTime` or `Instant` is used to model data in simpler applications. This class may be used when modeling date-time concepts in more detail, or when communicating to a database or in a network protocol.

## Summary

### Fields
`public static final OffsetDateTime` | `MAX` The maximum supported `OffsetDateTime`, '+999999999-12-31T23:59:59.999999999-18:00'.
`public static final OffsetDateTime` | `MIN` The minimum supported `OffsetDateTime`, '-999999999-01-01T00:00:00+18:00'.

### Public methods
`Temporal` | `adjustInto(Temporal temporal)` Adjusts the specified temporal object to have the same offset, date and time as this object.
`ZonedDateTime` | `atZoneSameInstant(ZoneId zone)` Combines this date-time with a time-zone to create a `ZonedDateTime` ensuring that the result has the same instant.
`ZonedDateTime` | `atZoneSimilarLocal(ZoneId zone)` Combines this date-time with a time-zone to create a `ZonedDateTime` trying to keep the same local date and time.
`int` | `compareTo(OffsetDateTime other)` Compares this date-time to another date-time.
`boolean` | `equals(Object obj)` Checks if this date-time is equal to another date-time.
`String` | `format(DateTimeFormatter formatter)` Formats this date-time using the specified formatter.
`static OffsetDateTime` | `from(TemporalAccessor temporal)` Obtains an instance of `OffsetDateTime` from a temporal object.
`int` | `get(TemporalField field)` Gets the value of the specified field from this date-time as an `int`.
`int` | `getDayOfMonth()` Gets the day-of-month field.
`DayOfWeek` | `getDayOfWeek()` Gets the day-of-week field, which is an enum `DayOfWeek`.
`int` | `getDayOfYear()` Gets the day-of-year field.
`int` | `getHour()` Gets the hour-of-day field.
`long` | `getLong(TemporalField field)` Gets the value of the specified field from this date-time as a `long`.
`int` | `getMinute()` Gets the minute-of-hour field.
`Month` | `getMonth()` Gets the month-of-year field using the `Month` enum.
`int` | `getMonthValue()` Gets the month-of-year field from 1 to 12.
`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` | `getYear()` Gets the year field.
`int` | `hashCode()` A hash code for this date-time.
`boolean` | `isAfter(OffsetDateTime other)` Checks if the instant of this date-time is after that of the specified date-time.
`boolean` | `isBefore(OffsetDateTime other)` Checks if the instant of this date-time is before that of the specified date-time.
`boolean` | `isEqual(OffsetDateTime other)` Checks if the instant of this date-time is equal to that of the specified date-time.
`boolean` | `isSupported(TemporalUnit unit)` Checks if the specified unit is supported.
`boolean` | `isSupported(TemporalField field)` Checks if the specified field is supported.
`OffsetDateTime` | `minus(TemporalAmount amountToSubtract)` Returns a copy of this date-time with the specified amount subtracted.
`OffsetDateTime` | `minus(long amountToSubtract, TemporalUnit unit)` Returns a copy of this date-time with the specified amount subtracted.
`OffsetDateTime` | `minusDays(long days)` Returns a copy of this `OffsetDateTime` with the specified number of days subtracted.
`OffsetDateTime` | `minusHours(long hours)` Returns a copy of this `OffsetDateTime` with the specified number of hours subtracted.
`OffsetDateTime` | `minusMinutes(long minutes)` Returns a copy of this `OffsetDateTime` with the specified number of minutes subtracted.
`OffsetDateTime` | `minusMonths(long months)` Returns a copy of this `OffsetDateTime` with the specified number of months subtracted.
`OffsetDateTime` | `minusNanos(long nanos)` Returns a copy of this `OffsetDateTime` with the specified number of nanoseconds subtracted.
`OffsetDateTime` | `minusSeconds(long seconds)` Returns a copy of this `OffsetDateTime` with the specified number of seconds subtracted.
`OffsetDateTime` | `minusWeeks(long weeks)` Returns a copy of this `OffsetDateTime` with the specified number of weeks subtracted.
`OffsetDateTime` | `minusYears(long years)` Returns a copy of this `OffsetDateTime` with the specified number of years subtracted.
`static OffsetDateTime` | `now(ZoneId zone)` Obtains the current date-time from the system clock in the specified time-zone.
`static OffsetDateTime` | `now()` Obtains the current date-time from the system clock in the default time-zone.
`static OffsetDateTime` | `now(Clock clock)` Obtains the current date-time from the specified clock.
`static OffsetDateTime` | `of(LocalDateTime dateTime, ZoneOffset offset)` Obtains an instance of `OffsetDateTime` from a date-time and offset.
`static OffsetDateTime` | `of(LocalDate date, LocalTime time, ZoneOffset offset)` Obtains an instance of `OffsetDateTime` from a date, time and offset.
`static OffsetDateTime` | `of(int year, int month, int dayOfMonth, int hour, int minute, int second, int nanoOfSecond, ZoneOffset offset)` Obtains an instance of `OffsetDateTime` from a year, month, day, hour, minute, second, nanosecond and offset.
`static OffsetDateTime` | `ofInstant(Instant instant, ZoneId zone)` Obtains an instance of `OffsetDateTime` from an `Instant` and zone ID.
`static OffsetDateTime` | `parse(CharSequence text, DateTimeFormatter formatter)` Obtains an instance of `OffsetDateTime` from a text string using a specific formatter.
`static OffsetDateTime` | `parse(CharSequence text)` Obtains an instance of `OffsetDateTime` from a text string such as `2007-12-03T10:15:30+01:00`.
`OffsetDateTime` | `plus(TemporalAmount amountToAdd)` Returns a copy of this date-time with the specified amount added.
`OffsetDateTime` | `plus(long amountToAdd, TemporalUnit unit)` Returns a copy of this date-time with the specified amount added.
`OffsetDateTime` | `plusDays(long days)` Returns a copy of this OffsetDateTime with the specified number of days added.
`OffsetDateTime` | `plusHours(long hours)` Returns a copy of this `OffsetDateTime` with the specified number of hours added.
`OffsetDateTime` | `plusMinutes(long minutes)` Returns a copy of this `OffsetDateTime` with the specified number of minutes added.
`OffsetDateTime` | `plusMonths(long months)` Returns a copy of this `OffsetDateTime` with the specified number of months added.
`OffsetDateTime` | `plusNanos(long nanos)` Returns a copy of this `OffsetDateTime` with the specified number of nanoseconds added.
`OffsetDateTime` | `plusSeconds(long seconds)` Returns a copy of this `OffsetDateTime` with the specified number of seconds added.
`OffsetDateTime` | `plusWeeks(long weeks)` Returns a copy of this OffsetDateTime with the specified number of weeks added.
`OffsetDateTime` | `plusYears(long years)` Returns a copy of this `OffsetDateTime` with the specified number of years added.
`<R> R` | `query(TemporalQuery<R> query)` Queries this date-time using the specified query.
`ValueRange` | `range(TemporalField field)` Gets the range of valid values for the specified field.
`static Comparator<OffsetDateTime>` | `timeLineOrder()` Gets a comparator that compares two `OffsetDateTime` instances based solely on the instant.
`long` | `toEpochSecond()` Converts this date-time to the number of seconds from the epoch of 1970-01-01T00:00:00Z.
`Instant` | `toInstant()` Converts this date-time to an `Instant`.
`LocalDate` | `toLocalDate()` Gets the `LocalDate` part of this date-time.
`LocalDateTime` | `toLocalDateTime()` Gets the `LocalDateTime` part of this date-time.
`LocalTime` | `toLocalTime()` Gets the `LocalTime` part of this date-time.
`OffsetTime` | `toOffsetTime()` Converts this date-time to an `OffsetTime`.
`String` | `toString()` Outputs this date-time as a `String`, such as `2007-12-03T10:15:30+01:00`.
`ZonedDateTime` | `toZonedDateTime()` Converts this date-time to a `ZonedDateTime` using the offset as the zone ID.
`OffsetDateTime` | `truncatedTo(TemporalUnit unit)` Returns a copy of this `OffsetDateTime` with the time truncated.
`long` | `until(Temporal endExclusive, TemporalUnit unit)` Calculates the amount of time until another date-time in terms of the specified unit.
`OffsetDateTime` | `with(TemporalField field, long newValue)` Returns a copy of this date-time with the specified field set to a new value.
`OffsetDateTime` | `with(TemporalAdjuster adjuster)` Returns an adjusted copy of this date-time.
`OffsetDateTime` | `withDayOfMonth(int dayOfMonth)` Returns a copy of this `OffsetDateTime` with the day-of-month altered.
`OffsetDateTime` | `withDayOfYear(int dayOfYear)` Returns a copy of this `OffsetDateTime` with the day-of-year altered.
`OffsetDateTime` | `withHour(int hour)` Returns a copy of this `OffsetDateTime` with the hour-of-day altered.
`OffsetDateTime` | `withMinute(int minute)` Returns a copy of this `OffsetDateTime` with the minute-of-hour altered.
`OffsetDateTime` | `withMonth(int month)` Returns a copy of this `OffsetDateTime` with the month-of-year altered.
`OffsetDateTime` | `withNano(int nanoOfSecond)` Returns a copy of this `OffsetDateTime` with the nano-of-second altered.
`OffsetDateTime` | `withOffsetSameInstant(ZoneOffset offset)` Returns a copy of this `OffsetDateTime` with the specified offset ensuring that the result is at the same instant.
`OffsetDateTime` | `withOffsetSameLocal(ZoneOffset offset)` Returns a copy of this `OffsetDateTime` with the specified offset ensuring that the result has the same local date-time.
`OffsetDateTime` | `withSecond(int second)` Returns a copy of this `OffsetDateTime` with the second-of-minute altered.
`OffsetDateTime` | `withYear(int year)` Returns a copy of this `OffsetDateTime` with the year altered.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
From interface `java.time.temporal.Temporal`
`abstract boolean` | `isSupported(TemporalUnit unit)` Checks if the specified unit is supported.
`default Temporal` | `minus(TemporalAmount amount)` Returns an object of the same type as this object with an amount subtracted.
`default Temporal` | `minus(long amountToSubtract, TemporalUnit unit)` Returns an object of the same type as this object with the specified period subtracted.
`abstract Temporal` | `plus(long amountToAdd, TemporalUnit unit)` Returns an object of the same type as this object with the specified period added.
`default Temporal` | `plus(TemporalAmount amount)` Returns an object of the same type as this object with an amount added.
`abstract long` | `until(Temporal endExclusive, TemporalUnit unit)` Calculates the amount of time until another temporal in terms of the specified unit.
`abstract Temporal` | `with(TemporalField field, long newValue)` Returns an object of the same type as this object with the specified field altered.
`default Temporal` | `with(TemporalAdjuster adjuster)` Returns an adjusted object of the same type as this object with the adjustment made.
From interface `java.time.temporal.TemporalAdjuster`
`abstract Temporal` | `adjustInto(Temporal temporal)` Adjusts the specified temporal object.
From interface `java.lang.Comparable`
`abstract int` | `compareTo(OffsetDateTime o)` Compares this object with the specified object for order.
From interface `java.time.temporal.TemporalAccessor`
`default int` | `get(TemporalField field)` Gets the value of the specified field as an `int`.
`abstract long` | `getLong(TemporalField field)` Gets the value of the specified field as a `long`.
`abstract boolean` | `isSupported(TemporalField field)` Checks if the specified field is supported.
`default <R> R` | `query(TemporalQuery<R> query)` Queries this date-time.
`default ValueRange` | `range(TemporalField field)` Gets the range of valid values for the specified field.

## Fields

### MAX

    public static final OffsetDateTime MAX

The maximum supported `OffsetDateTime`, '+999999999-12-31T23:59:59.999999999-18:00'. This is the local date-time just before midnight at the end of the maximum date in the minimum offset (larger negative offsets are later on the time-line). This combines `LocalDateTime#MAX` and `ZoneOffset#MIN`. This could be used by an application as a "far future" date-time.

### MIN

    public static final OffsetDateTime MIN

The minimum supported `OffsetDateTime`, '-999999999-01-01T00:00:00+18:00'. This is the local date-time of midnight at the start of the minimum date in the maximum offset (larger offsets are earlier on the time-line). This combines `LocalDateTime#MIN` and `ZoneOffset#MAX`. This could be used by an application as a "far past" date-time.

## Public methods

### adjustInto

    public Temporal adjustInto (Temporal temporal)

Adjusts the specified temporal object to have the same offset, date and time as this object.

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

The adjustment is equivalent to using `Temporal#with(TemporalField, long)` three times, passing `ChronoField#EPOCH_DAY`, `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 = thisOffsetDateTime.adjustInto(temporal);
       temporal = temporal.with(thisOffsetDateTime);

This instance is immutable and unaffected by this method call.

Parameters
`temporal` | `Temporal`: the target object to be adjusted, not null

Returns
`Temporal` | the adjusted object, not null

Throws
`DateTimeException` | if unable to make the adjustment
`ArithmeticException` | if numeric overflow occurs

### atZoneSameInstant

    public ZonedDateTime atZoneSameInstant (ZoneId zone)

Combines this date-time with a time-zone to create a `ZonedDateTime` ensuring that the result has the same instant.

This returns a `ZonedDateTime` formed from this date-time and the specified time-zone. This conversion will ignore the visible local date-time and use the underlying instant instead. This avoids any problems with local time-line gaps or overlaps. The result might have different values for fields such as hour, minute an even day.

To attempt to retain the values of the fields, use `atZoneSimilarLocal(java.time.ZoneId)`. To use the offset as the zone ID, use `toZonedDateTime()`.

Parameters
`zone` | `ZoneId`: the time-zone to use, not null

Returns
`ZonedDateTime` | the zoned date-time formed from this date-time, not null

### atZoneSimilarLocal

    public ZonedDateTime atZoneSimilarLocal (ZoneId zone)

Combines this date-time with a time-zone to create a `ZonedDateTime` trying to keep the same local date and time.

This returns a `ZonedDateTime` formed from this date-time and the specified time-zone. Where possible, the result will have the same local date-time as this object.

Time-zone rules, such as daylight savings, mean that not every time on the local time-line exists. If the local date-time is in a gap or overlap according to the rules then a resolver is used to determine the resultant local time and offset. This method uses `ZonedDateTime#ofLocal(LocalDateTime, ZoneId, ZoneOffset)` to retain the offset from this instance if possible.

Finer control over gaps and overlaps is available in two ways. If you simply want to use the later offset at overlaps then call `ZonedDateTime#withLaterOffsetAtOverlap()` immediately after this method.

To create a zoned date-time at the same instant irrespective of the local time-line, use `atZoneSameInstant(java.time.ZoneId)`. To use the offset as the zone ID, use `toZonedDateTime()`.

Parameters
`zone` | `ZoneId`: the time-zone to use, not null

Returns
`ZonedDateTime` | the zoned date-time formed from this date and the earliest valid time for the zone, not null

### compareTo

    public int compareTo (OffsetDateTime other)

Compares this date-time to another date-time.

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

For example, the following is the comparator order:

1. `2008-12-03T10:30+01:00`
2. `2008-12-03T11:00+01:00`
3. `2008-12-03T12:00+02:00`
4. `2008-12-03T11:30+01:00`
5. `2008-12-03T12:00+01:00`
6. `2008-12-03T12:30+01:00`

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

Parameters
`other` | `OffsetDateTime`: the other date-time to compare to, not null

Returns
`int` | the comparator value, negative if less, positive if greater

### equals

    public boolean equals (Object obj)

Checks if this date-time is equal to another date-time.

The comparison is based on the local date-time and the offset. To compare for the same instant on the time-line, use `isEqual(OffsetDateTime)`. Only objects of type `OffsetDateTime` are compared, other types return false.

Parameters
`obj` | `Object`: the object to check, null returns false

Returns
`boolean` | true if this is equal to the other date-time

### format

    public String format (DateTimeFormatter formatter)

Formats this date-time using the specified formatter.

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

Parameters
`formatter` | `DateTimeFormatter`: the formatter to use, not null

Returns
`String` | the formatted date-time string, not null

Throws
`DateTimeException` | if an error occurs during printing

### from

    public static OffsetDateTime from (TemporalAccessor temporal)

Obtains an instance of `OffsetDateTime` from a temporal object.

This obtains an offset date-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 `OffsetDateTime`.

The conversion will first obtain a `ZoneOffset` from the temporal object. It will then try to obtain a `LocalDateTime`, falling back to an `Instant` if necessary. The result will be the combination of `ZoneOffset` with either with `LocalDateTime` or `Instant`. 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, `OffsetDateTime::from`.

Parameters
`temporal` | `TemporalAccessor`: the temporal object to convert, not null

Returns
`OffsetDateTime` | the offset date-time, not null

Throws
`DateTimeException` | if unable to convert to an `OffsetDateTime`

### get

    public int get (TemporalField field)

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

This queries this date-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 date-time, except `NANO_OF_DAY`, `MICRO_OF_DAY`, `EPOCH_DAY`, `PROLEPTIC_MONTH` and `INSTANT_SECONDS` which are too large to fit in an `int` and throw a `DateTimeException`. All other `ChronoField` instances will throw an `UnsupportedTemporalTypeException`.

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

Parameters
`field` | `TemporalField`: the field to get, not null

Returns
`int` | 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

### getDayOfMonth

    public int getDayOfMonth ()

Gets the day-of-month field.

This method returns the primitive `int` value for the day-of-month.

Returns
`int` | the day-of-month, from 1 to 31

### getDayOfWeek

    public DayOfWeek getDayOfWeek ()

Gets the day-of-week field, which is an enum `DayOfWeek`.

This method returns the enum `DayOfWeek` for the day-of-week. This avoids confusion as to what `int` values mean. If you need access to the primitive `int` value then the enum provides the `int value`.

Additional information can be obtained from the `DayOfWeek`. This includes textual names of the values.

Returns
`DayOfWeek` | the day-of-week, not null

### getDayOfYear

    public int getDayOfYear ()

Gets the day-of-year field.

This method returns the primitive `int` value for the day-of-year.

Returns
`int` | the day-of-year, from 1 to 365, or 366 in a leap year

### getHour

    public int getHour ()

Gets the hour-of-day field.

Returns
`int` | the hour-of-day, from 0 to 23

### getLong

    public long getLong (TemporalField field)

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

This queries this date-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 date-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.

Parameters
`field` | `TemporalField`: the field to get, not null

Returns
`long` | 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

### getMinute

    public int getMinute ()

Gets the minute-of-hour field.

Returns
`int` | the minute-of-hour, from 0 to 59

### getMonth

    public Month getMonth ()

Gets the month-of-year field using the `Month` enum.

This method returns the enum `Month` for the month. This avoids confusion as to what `int` values mean. If you need access to the primitive `int` value then the enum provides the `int value`.

Returns
`Month` | the month-of-year, not null

See also:

- `getMonthValue()`

### getMonthValue

    public int getMonthValue ()

Gets the month-of-year field from 1 to 12.

This method returns the month as an `int` from 1 to 12. Application code is frequently clearer if the enum `Month` is used by calling `getMonth()`.

Returns
`int` | the month-of-year, from 1 to 12

See also:

- `getMonth()`

### getNano

    public int getNano ()

Gets the nano-of-second field.

Returns
`int` | the nano-of-second, from 0 to 999,999,999

### getOffset

    public ZoneOffset getOffset ()

Gets the zone offset, such as '+01:00'.

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

Returns
`ZoneOffset` | the zone offset, not null

### getSecond

    public int getSecond ()

Gets the second-of-minute field.

Returns
`int` | the second-of-minute, from 0 to 59

### getYear

    public int getYear ()

Gets the year field.

This method returns the primitive `int` value for the year.

The year returned by this method is proleptic as per `get(YEAR)`. To obtain the year-of-era, use `get(YEAR_OF_ERA)`.

Returns
`int` | the year, from MIN_YEAR to MAX_YEAR

### hashCode

    public int hashCode ()

A hash code for this date-time.

Returns
`int` | a suitable hash code

### isAfter

    public boolean isAfter (OffsetDateTime other)

Checks if the instant of this date-time is after that of the specified date-time.

This method differs from the comparison in `Comparable.compareTo(T)` and `equals(Object)` in that it only compares the instant of the date-time. This is equivalent to using `dateTime1.toInstant().isAfter(dateTime2.toInstant());`.

Parameters
`other` | `OffsetDateTime`: the other date-time to compare to, not null

Returns
`boolean` | true if this is after the instant of the specified date-time

### isBefore

    public boolean isBefore (OffsetDateTime other)

Checks if the instant of this date-time is before that of the specified date-time.

This method differs from the comparison in `Comparable.compareTo(T)` in that it only compares the instant of the date-time. This is equivalent to using `dateTime1.toInstant().isBefore(dateTime2.toInstant());`.

Parameters
`other` | `OffsetDateTime`: the other date-time to compare to, not null

Returns
`boolean` | true if this is before the instant of the specified date-time

### isEqual

    public boolean isEqual (OffsetDateTime other)

Checks if the instant of this date-time is equal to that of the specified date-time.

This method differs from the comparison in `Comparable.compareTo(T)` and `equals(Object)` in that it only compares the instant of the date-time. This is equivalent to using `dateTime1.toInstant().equals(dateTime2.toInstant());`.

Parameters
`other` | `OffsetDateTime`: the other date-time to compare to, not null

Returns
`boolean` | true if the instant equals the instant of the specified date-time

### 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 date-time. If false, then calling the `plus(long, java.time.temporal.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`
- `DAYS`
- `WEEKS`
- `MONTHS`
- `YEARS`
- `DECADES`
- `CENTURIES`
- `MILLENNIA`
- `ERAS`

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.

Parameters
`unit` | `TemporalUnit`: the unit to check, null returns false

Returns
`boolean` | true if the unit can be added/subtracted, false if not

### isSupported

    public boolean isSupported (TemporalField field)

Checks if the specified field is supported.

This checks if this date-time can be queried for the specified field. If false, then calling the `range`, `get` and `with(java.time.temporal.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`
- `DAY_OF_WEEK`
- `ALIGNED_DAY_OF_WEEK_IN_MONTH`
- `ALIGNED_DAY_OF_WEEK_IN_YEAR`
- `DAY_OF_MONTH`
- `DAY_OF_YEAR`
- `EPOCH_DAY`
- `ALIGNED_WEEK_OF_MONTH`
- `ALIGNED_WEEK_OF_YEAR`
- `MONTH_OF_YEAR`
- `PROLEPTIC_MONTH`
- `YEAR_OF_ERA`
- `YEAR`
- `ERA`
- `INSTANT_SECONDS`
- `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.

Parameters
`field` | `TemporalField`: the field to check, null returns false

Returns
`boolean` | true if the field is supported on this date-time, false if not

### minus

    public OffsetDateTime minus (TemporalAmount amountToSubtract)

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

This returns an `OffsetDateTime`, based on this one, with the specified amount subtracted. The amount is typically `Period` or `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, java.time.temporal.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.

Parameters
`amountToSubtract` | `TemporalAmount`: the amount to subtract, not null

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the subtraction made, not null

Throws
`DateTimeException` | if the subtraction cannot be made
`ArithmeticException` | if numeric overflow occurs

### minus

    public OffsetDateTime minus (long amountToSubtract,
                    TemporalUnit unit)

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

This returns an `OffsetDateTime`, 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, java.time.temporal.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.

Parameters
`amountToSubtract` | `long`: the amount of the unit to subtract from the result, may be negative
`unit` | `TemporalUnit`: the unit of the amount to subtract, not null

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-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

### minusDays

    public OffsetDateTime minusDays (long days)

Returns a copy of this `OffsetDateTime` with the specified number of days subtracted.

This method subtracts the specified amount from the days field decrementing the month and year fields as necessary to ensure the result remains valid. The result is only invalid if the maximum/minimum year is exceeded.

For example, 2008-12-31 minus one day would result in 2009-01-01.

This instance is immutable and unaffected by this method call.

Parameters
`days` | `long`: the days to subtract, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the days subtracted, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### minusHours

    public OffsetDateTime minusHours (long hours)

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

This instance is immutable and unaffected by this method call.

Parameters
`hours` | `long`: the hours to subtract, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the hours subtracted, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### minusMinutes

    public OffsetDateTime minusMinutes (long minutes)

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

This instance is immutable and unaffected by this method call.

Parameters
`minutes` | `long`: the minutes to subtract, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the minutes subtracted, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### minusMonths

    public OffsetDateTime minusMonths (long months)

Returns a copy of this `OffsetDateTime` with the specified number of months subtracted.

This method subtracts the specified amount from the months field in three steps:

1. Subtract the input months from the month-of-year field
2. Check if the resulting date would be invalid
3. Adjust the day-of-month to the last valid day if necessary

For example, 2007-03-31 minus one month would result in the invalid date 2007-04-31. Instead of returning an invalid result, the last valid day of the month, 2007-04-30, is selected instead.

This instance is immutable and unaffected by this method call.

Parameters
`months` | `long`: the months to subtract, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the months subtracted, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### minusNanos

    public OffsetDateTime minusNanos (long nanos)

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

This instance is immutable and unaffected by this method call.

Parameters
`nanos` | `long`: the nanos to subtract, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the nanoseconds subtracted, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### minusSeconds

    public OffsetDateTime minusSeconds (long seconds)

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

This instance is immutable and unaffected by this method call.

Parameters
`seconds` | `long`: the seconds to subtract, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the seconds subtracted, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### minusWeeks

    public OffsetDateTime minusWeeks (long weeks)

Returns a copy of this `OffsetDateTime` with the specified number of weeks subtracted.

This method subtracts the specified amount in weeks from the days field decrementing the month and year fields as necessary to ensure the result remains valid. The result is only invalid if the maximum/minimum year is exceeded.

For example, 2008-12-31 minus one week would result in 2009-01-07.

This instance is immutable and unaffected by this method call.

Parameters
`weeks` | `long`: the weeks to subtract, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the weeks subtracted, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### minusYears

    public OffsetDateTime minusYears (long years)

Returns a copy of this `OffsetDateTime` with the specified number of years subtracted.

This method subtracts the specified amount from the years field in three steps:

1. Subtract the input years from the year field
2. Check if the resulting date would be invalid
3. Adjust the day-of-month to the last valid day if necessary

For example, 2008-02-29 (leap year) minus one year would result in the invalid date 2009-02-29 (standard year). Instead of returning an invalid result, the last valid day of the month, 2009-02-28, is selected instead.

This instance is immutable and unaffected by this method call.

Parameters
`years` | `long`: the years to subtract, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the years subtracted, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### now

    public static OffsetDateTime now (ZoneId zone)

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

This will query the `system clock` to obtain the current date-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` | `ZoneId`: the zone ID to use, not null

Returns
`OffsetDateTime` | the current date-time using the system clock, not null

### now

    public static OffsetDateTime now ()

Obtains the current date-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 date-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
`OffsetDateTime` | the current date-time using the system clock, not null

### now

    public static OffsetDateTime now (Clock clock)

Obtains the current date-time from the specified clock.

This will query the specified clock to obtain the current date-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` | `Clock`: the clock to use, not null

Returns
`OffsetDateTime` | the current date-time, not null

### of

    public static OffsetDateTime of (LocalDateTime dateTime,
                    ZoneOffset offset)

Obtains an instance of `OffsetDateTime` from a date-time and offset.

This creates an offset date-time with the specified local date-time and offset.

Parameters
`dateTime` | `LocalDateTime`: the local date-time, not null
`offset` | `ZoneOffset`: the zone offset, not null

Returns
`OffsetDateTime` | the offset date-time, not null

### of

    public static OffsetDateTime of (LocalDate date,
                    LocalTime time,
                    ZoneOffset offset)

Obtains an instance of `OffsetDateTime` from a date, time and offset.

This creates an offset date-time with the specified local date, time and offset.

Parameters
`date` | `LocalDate`: the local date, not null
`time` | `LocalTime`: the local time, not null
`offset` | `ZoneOffset`: the zone offset, not null

Returns
`OffsetDateTime` | the offset date-time, not null

### of

    public static OffsetDateTime of (int year,
                    int month,
                    int dayOfMonth,
                    int hour,
                    int minute,
                    int second,
                    int nanoOfSecond,
                    ZoneOffset offset)

Obtains an instance of `OffsetDateTime` from a year, month, day, hour, minute, second, nanosecond and offset.

This creates an offset date-time with the seven specified fields.

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

Parameters
`year` | `int`: the year to represent, from MIN_YEAR to MAX_YEAR
`month` | `int`: the month-of-year to represent, from 1 (January) to 12 (December)
`dayOfMonth` | `int`: the day-of-month to represent, from 1 to 31
`hour` | `int`: the hour-of-day to represent, from 0 to 23
`minute` | `int`: the minute-of-hour to represent, from 0 to 59
`second` | `int`: the second-of-minute to represent, from 0 to 59
`nanoOfSecond` | `int`: the nano-of-second to represent, from 0 to 999,999,999
`offset` | `ZoneOffset`: the zone offset, not null

Returns
`OffsetDateTime` | the offset date-time, not null

Throws
`DateTimeException` | if the value of any field is out of range, or if the day-of-month is invalid for the month-year

### ofInstant

    public static OffsetDateTime ofInstant (Instant instant,
                    ZoneId zone)

Obtains an instance of `OffsetDateTime` from an `Instant` and zone ID.

This creates an offset date-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.

Parameters
`instant` | `Instant`: the instant to create the date-time from, not null
`zone` | `ZoneId`: the time-zone, which may be an offset, not null

Returns
`OffsetDateTime` | the offset date-time, not null

Throws
`DateTimeException` | if the result exceeds the supported range

### parse

    public static OffsetDateTime parse (CharSequence text,
                    DateTimeFormatter formatter)

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

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

Parameters
`text` | `CharSequence`: the text to parse, not null
`formatter` | `DateTimeFormatter`: the formatter to use, not null

Returns
`OffsetDateTime` | the parsed offset date-time, not null

Throws
`DateTimeParseException` | if the text cannot be parsed

### parse

    public static OffsetDateTime parse (CharSequence text)

Obtains an instance of `OffsetDateTime` from a text string such as `2007-12-03T10:15:30+01:00`.

The string must represent a valid date-time and is parsed using `DateTimeFormatter.ISO_OFFSET_DATE_TIME`.

Parameters
`text` | `CharSequence`: the text to parse such as "2007-12-03T10:15:30+01:00", not null

Returns
`OffsetDateTime` | the parsed offset date-time, not null

Throws
`DateTimeParseException` | if the text cannot be parsed

### plus

    public OffsetDateTime plus (TemporalAmount amountToAdd)

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

This returns an `OffsetDateTime`, based on this one, with the specified amount added. The amount is typically `Period` or `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, java.time.temporal.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.

Parameters
`amountToAdd` | `TemporalAmount`: the amount to add, not null

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the addition made, not null

Throws
`DateTimeException` | if the addition cannot be made
`ArithmeticException` | if numeric overflow occurs

### plus

    public OffsetDateTime plus (long amountToAdd,
                    TemporalUnit unit)

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

This returns an `OffsetDateTime`, 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 `LocalDateTime#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.

Parameters
`amountToAdd` | `long`: the amount of the unit to add to the result, may be negative
`unit` | `TemporalUnit`: the unit of the amount to add, not null

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-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

### plusDays

    public OffsetDateTime plusDays (long days)

Returns a copy of this OffsetDateTime with the specified number of days added.

This method adds the specified amount to the days field incrementing the month and year fields as necessary to ensure the result remains valid. The result is only invalid if the maximum/minimum year is exceeded.

For example, 2008-12-31 plus one day would result in 2009-01-01.

This instance is immutable and unaffected by this method call.

Parameters
`days` | `long`: the days to add, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the days added, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### plusHours

    public OffsetDateTime plusHours (long hours)

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

This instance is immutable and unaffected by this method call.

Parameters
`hours` | `long`: the hours to add, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the hours added, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### plusMinutes

    public OffsetDateTime plusMinutes (long minutes)

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

This instance is immutable and unaffected by this method call.

Parameters
`minutes` | `long`: the minutes to add, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the minutes added, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### plusMonths

    public OffsetDateTime plusMonths (long months)

Returns a copy of this `OffsetDateTime` with the specified number of months added.

This method adds the specified amount to the months field in three steps:

1. Add the input months to the month-of-year field
2. Check if the resulting date would be invalid
3. Adjust the day-of-month to the last valid day if necessary

For example, 2007-03-31 plus one month would result in the invalid date 2007-04-31. Instead of returning an invalid result, the last valid day of the month, 2007-04-30, is selected instead.

This instance is immutable and unaffected by this method call.

Parameters
`months` | `long`: the months to add, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the months added, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### plusNanos

    public OffsetDateTime plusNanos (long nanos)

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

This instance is immutable and unaffected by this method call.

Parameters
`nanos` | `long`: the nanos to add, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the nanoseconds added, not null

Throws
`DateTimeException` | if the unit cannot be added to this type

### plusSeconds

    public OffsetDateTime plusSeconds (long seconds)

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

This instance is immutable and unaffected by this method call.

Parameters
`seconds` | `long`: the seconds to add, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the seconds added, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### plusWeeks

    public OffsetDateTime plusWeeks (long weeks)

Returns a copy of this OffsetDateTime with the specified number of weeks added.

This method adds the specified amount in weeks to the days field incrementing the month and year fields as necessary to ensure the result remains valid. The result is only invalid if the maximum/minimum year is exceeded.

For example, 2008-12-31 plus one week would result in 2009-01-07.

This instance is immutable and unaffected by this method call.

Parameters
`weeks` | `long`: the weeks to add, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the weeks added, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### plusYears

    public OffsetDateTime plusYears (long years)

Returns a copy of this `OffsetDateTime` with the specified number of years added.

This method adds the specified amount to the years field in three steps:

1. Add the input years to the year field
2. Check if the resulting date would be invalid
3. Adjust the day-of-month to the last valid day if necessary

For example, 2008-02-29 (leap year) plus one year would result in the invalid date 2009-02-29 (standard year). Instead of returning an invalid result, the last valid day of the month, 2009-02-28, is selected instead.

This instance is immutable and unaffected by this method call.

Parameters
`years` | `long`: the years to add, may be negative

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the years added, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### query

    public R query (TemporalQuery<R> query)

Queries this date-time using the specified query.

This queries this date-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.

Parameters
`query` | `TemporalQuery`: the query to invoke, not null

Returns
`R` | 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)

### 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 date-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.

Parameters
`field` | `TemporalField`: the field to query the range for, not null

Returns
`ValueRange` | 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

### timeLineOrder

    public static Comparator<OffsetDateTime> timeLineOrder ()

Gets a comparator that compares two `OffsetDateTime` instances based solely on the instant.

This method differs from the comparison in `Comparable.compareTo(T)` in that it only compares the underlying instant.

Returns
`Comparator<OffsetDateTime>` | a comparator that compares in time-line order

See also:

- `isAfter(OffsetDateTime)`
- `isBefore(OffsetDateTime)`
- `isEqual(OffsetDateTime)`

### toEpochSecond

    public long toEpochSecond ()

Converts this date-time to the number of seconds from the epoch of 1970-01-01T00:00:00Z.

This allows this date-time to be converted to a value of the `epoch-seconds` field. This is primarily intended for low-level conversions rather than general application usage.

Returns
`long` | the number of seconds from the epoch of 1970-01-01T00:00:00Z

### toInstant

    public Instant toInstant ()

Converts this date-time to an `Instant`.

This returns an `Instant` representing the same point on the time-line as this date-time.

Returns
`Instant` | an `Instant` representing the same instant, not null

### toLocalDate

    public LocalDate toLocalDate ()

Gets the `LocalDate` part of this date-time.

This returns a `LocalDate` with the same year, month and day as this date-time.

Returns
`LocalDate` | the date part of this date-time, not null

### toLocalDateTime

    public LocalDateTime toLocalDateTime ()

Gets the `LocalDateTime` part of this date-time.

This returns a `LocalDateTime` with the same year, month, day and time as this date-time.

Returns
`LocalDateTime` | the local date-time part of this date-time, 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
`LocalTime` | the time part of this date-time, not null

### toOffsetTime

    public OffsetTime toOffsetTime ()

Converts this date-time to an `OffsetTime`.

This returns an offset time with the same local time and offset.

Returns
`OffsetTime` | an OffsetTime representing the time and offset, not null

### toString

    public String toString ()

Outputs this date-time as a `String`, such as `2007-12-03T10:15:30+01:00`.

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

- `uuuu-MM-dd'T'HH:mmXXXXX`
- `uuuu-MM-dd'T'HH:mm:ssXXXXX`
- `uuuu-MM-dd'T'HH:mm:ss.SSSXXXXX`
- `uuuu-MM-dd'T'HH:mm:ss.SSSSSSXXXXX`
- `uuuu-MM-dd'T'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.

Returns
`String` | a string representation of this date-time, not null

### toZonedDateTime

    public ZonedDateTime toZonedDateTime ()

Converts this date-time to a `ZonedDateTime` using the offset as the zone ID.

This creates the simplest possible `ZonedDateTime` using the offset as the zone ID.

To control the time-zone used, see `atZoneSameInstant(java.time.ZoneId)` and `atZoneSimilarLocal(java.time.ZoneId)`.

Returns
`ZonedDateTime` | a zoned date-time representing the same local date-time and offset, not null

### truncatedTo

    public OffsetDateTime truncatedTo (TemporalUnit unit)

Returns a copy of this `OffsetDateTime` with the time truncated.

Truncation returns a copy of the original date-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` | `TemporalUnit`: the unit to truncate to, not null

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the time truncated, not null

Throws
`DateTimeException` | if unable to truncate
`UnsupportedTemporalTypeException` | if the unit is not supported

### until

    public long until (Temporal endExclusive,
                    TemporalUnit unit)

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

This calculates the amount of time between two `OffsetDateTime` objects in terms of a single `TemporalUnit`. The start and end points are `this` and the specified date-time. The result will be negative if the end is before the start. For example, the amount in days between two date-times can be calculated using `startDateTime.until(endDateTime, DAYS)`.

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

The calculation returns a whole number, representing the number of complete units between the two date-times. For example, the amount in months between 2012-06-15T00:00Z and 2012-08-14T23:59Z will only be one month as it is one minute short of two months.

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, MONTHS);
       amount = MONTHS.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`, `DAYS`, `WEEKS`, `MONTHS`, `YEARS`, `DECADES`, `CENTURIES`, `MILLENNIA` and `ERAS` 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.

Parameters
`endExclusive` | `Temporal`: the end date, exclusive, which is converted to an `OffsetDateTime`, not null
`unit` | `TemporalUnit`: the unit to measure the amount in, not null

Returns
`long` | the amount of time between this date-time and the end date-time

Throws
`DateTimeException` | if the amount cannot be calculated, or the end temporal cannot be converted to an `OffsetDateTime`
`UnsupportedTemporalTypeException` | if the unit is not supported
`ArithmeticException` | if numeric overflow occurs

### with

    public OffsetDateTime with (TemporalField field,
                    long newValue)

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

This returns an `OffsetDateTime`, based on this one, with the value for the specified field changed. This can be used to change any supported field, such as the year, month or day-of-month. If it is not possible to set the value, because the field is not supported or for some other reason, an exception is thrown.

In some cases, changing the specified field can cause the resulting date-time to become invalid, such as changing the month from 31st January to February would make the day-of-month invalid. In cases like this, the field is responsible for resolving the date. Typically it will choose the previous valid date, which would be the last valid day of February in this example.

If the field is a `ChronoField` then the adjustment is implemented here.

The `INSTANT_SECONDS` field will return a date-time with the specified instant. The offset and nano-of-second are unchanged. If the new instant value is outside the valid range then a `DateTimeException` will be thrown.

The `OFFSET_SECONDS` field will return a date-time with the specified offset. The local date-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 `LocalDateTime`. 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.

Parameters
`field` | `TemporalField`: the field to set in the result, not null
`newValue` | `long`: the new value of the field in the result

Returns
`OffsetDateTime` | an `OffsetDateTime` 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

### with

    public OffsetDateTime with (TemporalAdjuster adjuster)

Returns an adjusted copy of this date-time.

This returns an `OffsetDateTime`, based on this one, with the date-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 year field. A more complex adjuster might set the date to the last day of the month. A selection of common adjustments is provided in `TemporalAdjusters`. These include finding the "last day of the month" and "next Wednesday". Key date-time classes also implement the `TemporalAdjuster` interface, such as `Month` and `MonthDay`. The adjuster is responsible for handling special cases, such as the varying lengths of month and leap years.

For example this code returns a date on the last day of July:

      import static java.time.Month.*;
      import static java.time.temporal.TemporalAdjusters.*;

      result = offsetDateTime.with(JULY).with(lastDayOfMonth());

The classes `LocalDate`, `LocalTime` and `ZoneOffset` implement `TemporalAdjuster`, thus this method can be used to change the date, time or offset:

      result = offsetDateTime.with(date);
      result = offsetDateTime.with(time);
      result = offsetDateTime.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.

Parameters
`adjuster` | `TemporalAdjuster`: the adjuster to use, not null

Returns
`OffsetDateTime` | an `OffsetDateTime` based on `this` with the adjustment made, not null

Throws
`DateTimeException` | if the adjustment cannot be made
`ArithmeticException` | if numeric overflow occurs

### withDayOfMonth

    public OffsetDateTime withDayOfMonth (int dayOfMonth)

Returns a copy of this `OffsetDateTime` with the day-of-month altered.

If the resulting `OffsetDateTime` is invalid, an exception is thrown. The time and offset do not affect the calculation and will be the same in the result.

This instance is immutable and unaffected by this method call.

Parameters
`dayOfMonth` | `int`: the day-of-month to set in the result, from 1 to 28-31

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested day, not null

Throws
`DateTimeException` | if the day-of-month value is invalid, or if the day-of-month is invalid for the month-year

### withDayOfYear

    public OffsetDateTime withDayOfYear (int dayOfYear)

Returns a copy of this `OffsetDateTime` with the day-of-year altered.

The time and offset do not affect the calculation and will be the same in the result. If the resulting `OffsetDateTime` is invalid, an exception is thrown.

This instance is immutable and unaffected by this method call.

Parameters
`dayOfYear` | `int`: the day-of-year to set in the result, from 1 to 365-366

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date with the requested day, not null

Throws
`DateTimeException` | if the day-of-year value is invalid, or if the day-of-year is invalid for the year

### withHour

    public OffsetDateTime withHour (int hour)

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

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

This instance is immutable and unaffected by this method call.

Parameters
`hour` | `int`: the hour-of-day to set in the result, from 0 to 23

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested hour, not null

Throws
`DateTimeException` | if the hour value is invalid

### withMinute

    public OffsetDateTime withMinute (int minute)

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

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

This instance is immutable and unaffected by this method call.

Parameters
`minute` | `int`: the minute-of-hour to set in the result, from 0 to 59

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested minute, not null

Throws
`DateTimeException` | if the minute value is invalid

### withMonth

    public OffsetDateTime withMonth (int month)

Returns a copy of this `OffsetDateTime` with the month-of-year altered.

The time and offset do not affect the calculation and will be the same in the result. If the day-of-month is invalid for the year, it will be changed to the last valid day of the month.

This instance is immutable and unaffected by this method call.

Parameters
`month` | `int`: the month-of-year to set in the result, from 1 (January) to 12 (December)

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested month, not null

Throws
`DateTimeException` | if the month-of-year value is invalid

### withNano

    public OffsetDateTime withNano (int nanoOfSecond)

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

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

This instance is immutable and unaffected by this method call.

Parameters
`nanoOfSecond` | `int`: the nano-of-second to set in the result, from 0 to 999,999,999

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested nanosecond, not null

Throws
`DateTimeException` | if the nano value is invalid

### withOffsetSameInstant

    public OffsetDateTime withOffsetSameInstant (ZoneOffset offset)

Returns a copy of this `OffsetDateTime` with the specified offset ensuring that the result is at the same instant.

This method returns an object with the specified `ZoneOffset` and a `LocalDateTime` adjusted by the difference between the two offsets. This will result in the old and new objects representing the same instant. This is useful for finding the local time in a different offset. For example, if this time represents `2007-12-03T10:30+02:00` and the offset specified is `+03:00`, then this method will return `2007-12-03T11:30+03:00`.

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

This instance is immutable and unaffected by this method call.

Parameters
`offset` | `ZoneOffset`: the zone offset to change to, not null

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested offset, not null

Throws
`DateTimeException` | if the result exceeds the supported date range

### withOffsetSameLocal

    public OffsetDateTime withOffsetSameLocal (ZoneOffset offset)

Returns a copy of this `OffsetDateTime` with the specified offset ensuring that the result has the same local date-time.

This method returns an object with the same `LocalDateTime` and the specified `ZoneOffset`. No calculation is needed or performed. For example, if this time represents `2007-12-03T10:30+02:00` and the offset specified is `+03:00`, then this method will return `2007-12-03T10:30+03:00`.

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

This instance is immutable and unaffected by this method call.

Parameters
`offset` | `ZoneOffset`: the zone offset to change to, not null

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested offset, not null

### withSecond

    public OffsetDateTime withSecond (int second)

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

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

This instance is immutable and unaffected by this method call.

Parameters
`second` | `int`: the second-of-minute to set in the result, from 0 to 59

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested second, not null

Throws
`DateTimeException` | if the second value is invalid

### withYear

    public OffsetDateTime withYear (int year)

Returns a copy of this `OffsetDateTime` with the year altered.

The time and offset do not affect the calculation and will be the same in the result. If the day-of-month is invalid for the year, it will be changed to the last valid day of the month.

This instance is immutable and unaffected by this method call.

Parameters
`year` | `int`: the year to set in the result, from MIN_YEAR to MAX_YEAR

Returns
`OffsetDateTime` | an `OffsetDateTime` based on this date-time with the requested year, not null

Throws
`DateTimeException` | if the year value is invalid

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