Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Methods](https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#inhmethods)

# ChronoZonedDateTime


`
public


interface
ChronoZonedDateTime
`


`


implements

https://developer.android.com/reference/java/lang/Comparable<https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?>>,

https://developer.android.com/reference/java/time/temporal/Temporal


`

|---|
| java.time.chrono.ChronoZonedDateTime\<D extends [java.time.chrono.ChronoLocalDate](https://developer.android.com/reference/java/time/chrono/ChronoLocalDate)\> |

|---|
| Known indirect subclasses [ZonedDateTime](https://developer.android.com/reference/java/time/ZonedDateTime) |---|---| | [ZonedDateTime](https://developer.android.com/reference/java/time/ZonedDateTime) | A date-time with a time-zone in the ISO-8601 calendar system, such as `2007-12-03T10:15:30+01:00 Europe/Paris`. | |

<br />

*** ** * ** ***

A date-time with a time-zone in an arbitrary chronology,
intended for advanced globalization use cases.


**Most applications should declare method signatures, fields and variables
as `https://developer.android.com/reference/java/time/ZonedDateTime`, not this interface.**


A `ChronoZonedDateTime` is the abstract representation of an offset date-time
where the `Chronology chronology`, or calendar system, is pluggable.
The date-time is defined in terms of fields expressed by `https://developer.android.com/reference/java/time/temporal/TemporalField`,
where most common implementations are defined in `https://developer.android.com/reference/java/time/temporal/ChronoField`.
The chronology defines how the calendar system operates and the meaning of
the standard fields.

## When to use this interface

The design of the API encourages the use of `ZonedDateTime` rather than this interface, even in the case where the application needs to deal with multiple calendar systems. The rationale for this is explored in detail in `https://developer.android.com/reference/java/time/chrono/ChronoLocalDate`.


Ensure that the discussion in `ChronoLocalDate` has been read and understood
before using this interface.

## Summary

| ### Public methods ||
|---|---|
| ` default int` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#compareTo(java.time.chrono.ChronoZonedDateTime<?>)(https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?> other) ` Compares this date-time to another date-time, including the chronology. |
| ` abstract boolean` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Checks if this date-time is equal to another date-time. |
| ` default https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#format(java.time.format.DateTimeFormatter)(https://developer.android.com/reference/java/time/format/DateTimeFormatter formatter) ` Formats this date-time using the specified formatter. |
| ` static https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#from(java.time.temporal.TemporalAccessor)(https://developer.android.com/reference/java/time/temporal/TemporalAccessor temporal) ` Obtains an instance of `ChronoZonedDateTime` from a temporal object. |
| ` default int` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#get(java.time.temporal.TemporalField)(https://developer.android.com/reference/java/time/temporal/TemporalField field) ` Gets the value of the specified field as an `int`. |
| ` default https://developer.android.com/reference/java/time/chrono/Chronology` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#getChronology()() ` Gets the chronology of this date-time. |
| ` default long` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#getLong(java.time.temporal.TemporalField)(https://developer.android.com/reference/java/time/temporal/TemporalField field) ` Gets the value of the specified field as a `long`. |
| ` abstract https://developer.android.com/reference/java/time/ZoneOffset` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#getOffset()() ` Gets the zone offset, such as '+01:00'. |
| ` abstract https://developer.android.com/reference/java/time/ZoneId` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#getZone()() ` Gets the zone ID, such as 'Europe/Paris'. |
| ` abstract int` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#hashCode()() ` A hash code for this date-time. |
| ` default boolean` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isAfter(java.time.chrono.ChronoZonedDateTime<?>)(https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?> other) ` Checks if the instant of this date-time is after that of the specified date-time. |
| ` default boolean` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isBefore(java.time.chrono.ChronoZonedDateTime<?>)(https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?> other) ` Checks if the instant of this date-time is before that of the specified date-time. |
| ` default boolean` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isEqual(java.time.chrono.ChronoZonedDateTime<?>)(https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?> other) ` Checks if the instant of this date-time is equal to that of the specified date-time. |
| ` default boolean` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isSupported(java.time.temporal.TemporalUnit)(https://developer.android.com/reference/java/time/temporal/TemporalUnit unit) ` Checks if the specified unit is supported. |
| ` abstract boolean` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isSupported(java.time.temporal.TemporalField)(https://developer.android.com/reference/java/time/temporal/TemporalField field) ` Checks if the specified field is supported. |
| ` default https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#minus(java.time.temporal.TemporalAmount)(https://developer.android.com/reference/java/time/temporal/TemporalAmount amount) ` Returns an object of the same type as this object with an amount subtracted. |
| ` default https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#minus(long,%20java.time.temporal.TemporalUnit)(long amountToSubtract, https://developer.android.com/reference/java/time/temporal/TemporalUnit unit) ` Returns an object of the same type as this object with the specified period subtracted. |
| ` default https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#plus(java.time.temporal.TemporalAmount)(https://developer.android.com/reference/java/time/temporal/TemporalAmount amount) ` Returns an object of the same type as this object with an amount added. |
| ` abstract https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#plus(long,%20java.time.temporal.TemporalUnit)(long amountToAdd, https://developer.android.com/reference/java/time/temporal/TemporalUnit unit) ` Returns an object of the same type as this object with the specified period added. |
| ` default <R> R` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#query(java.time.temporal.TemporalQuery<R>)(https://developer.android.com/reference/java/time/temporal/TemporalQuery<R> query) ` Queries this date-time using the specified query. |
| ` default https://developer.android.com/reference/java/time/temporal/ValueRange` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#range(java.time.temporal.TemporalField)(https://developer.android.com/reference/java/time/temporal/TemporalField field) ` Gets the range of valid values for the specified field. |
| ` static https://developer.android.com/reference/java/util/Comparator<https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?>>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#timeLineOrder()() ` Gets a comparator that compares `ChronoZonedDateTime` in time-line order ignoring the chronology. |
| ` default long` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#toEpochSecond()() ` Converts this date-time to the number of seconds from the epoch of 1970-01-01T00:00:00Z. |
| ` default https://developer.android.com/reference/java/time/Instant` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#toInstant()() ` Converts this date-time to an `Instant`. |
| ` default D` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#toLocalDate()() ` Gets the local date part of this date-time. |
| ` abstract https://developer.android.com/reference/java/time/chrono/ChronoLocalDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#toLocalDateTime()() ` Gets the local date-time part of this date-time. |
| ` default https://developer.android.com/reference/java/time/LocalTime` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#toLocalTime()() ` Gets the local time part of this date-time. |
| ` abstract https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#toString()() ` Outputs this date-time as a `String`. |
| ` abstract https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#with(java.time.temporal.TemporalField,%20long)(https://developer.android.com/reference/java/time/temporal/TemporalField field, long newValue) ` Returns an object of the same type as this object with the specified field altered. |
| ` default https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#with(java.time.temporal.TemporalAdjuster)(https://developer.android.com/reference/java/time/temporal/TemporalAdjuster adjuster) ` Returns an adjusted object of the same type as this object with the adjustment made. |
| ` abstract https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#withEarlierOffsetAtOverlap()() ` Returns a copy of this date-time changing the zone offset to the earlier of the two valid offsets at a local time-line overlap. |
| ` abstract https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#withLaterOffsetAtOverlap()() ` Returns a copy of this date-time changing the zone offset to the later of the two valid offsets at a local time-line overlap. |
| ` abstract https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#withZoneSameInstant(java.time.ZoneId)(https://developer.android.com/reference/java/time/ZoneId zone) ` Returns a copy of this date-time with a different time-zone, retaining the instant. |
| ` abstract https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | ` https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#withZoneSameLocal(java.time.ZoneId)(https://developer.android.com/reference/java/time/ZoneId zone) ` Returns a copy of this date-time with a different time-zone, retaining the local date-time if possible. |

| ### Inherited methods |
|---|---|
| From interface ` https://developer.android.com/reference/java/lang/Comparable ` |---|---| | ` abstract int` | ` https://developer.android.com/reference/java/lang/Comparable#compareTo(T)(https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?> o) ` Compares this object with the specified object for order. | ||
| From interface ` https://developer.android.com/reference/java/time/temporal/Temporal ` |---|---| | ` abstract boolean` | ` https://developer.android.com/reference/java/time/temporal/Temporal#isSupported(java.time.temporal.TemporalUnit)(https://developer.android.com/reference/java/time/temporal/TemporalUnit unit) ` Checks if the specified unit is supported. | | ` default https://developer.android.com/reference/java/time/temporal/Temporal` | ` https://developer.android.com/reference/java/time/temporal/Temporal#minus(java.time.temporal.TemporalAmount)(https://developer.android.com/reference/java/time/temporal/TemporalAmount amount) ` Returns an object of the same type as this object with an amount subtracted. | | ` default https://developer.android.com/reference/java/time/temporal/Temporal` | ` https://developer.android.com/reference/java/time/temporal/Temporal#minus(long,%20java.time.temporal.TemporalUnit)(long amountToSubtract, https://developer.android.com/reference/java/time/temporal/TemporalUnit unit) ` Returns an object of the same type as this object with the specified period subtracted. | | ` abstract https://developer.android.com/reference/java/time/temporal/Temporal` | ` https://developer.android.com/reference/java/time/temporal/Temporal#plus(long,%20java.time.temporal.TemporalUnit)(long amountToAdd, https://developer.android.com/reference/java/time/temporal/TemporalUnit unit) ` Returns an object of the same type as this object with the specified period added. | | ` default https://developer.android.com/reference/java/time/temporal/Temporal` | ` https://developer.android.com/reference/java/time/temporal/Temporal#plus(java.time.temporal.TemporalAmount)(https://developer.android.com/reference/java/time/temporal/TemporalAmount amount) ` Returns an object of the same type as this object with an amount added. | | ` abstract long` | ` https://developer.android.com/reference/java/time/temporal/Temporal#until(java.time.temporal.Temporal,%20java.time.temporal.TemporalUnit)(https://developer.android.com/reference/java/time/temporal/Temporal endExclusive, https://developer.android.com/reference/java/time/temporal/TemporalUnit unit) ` Calculates the amount of time until another temporal in terms of the specified unit. | | ` abstract https://developer.android.com/reference/java/time/temporal/Temporal` | ` https://developer.android.com/reference/java/time/temporal/Temporal#with(java.time.temporal.TemporalField,%20long)(https://developer.android.com/reference/java/time/temporal/TemporalField field, long newValue) ` Returns an object of the same type as this object with the specified field altered. | | ` default https://developer.android.com/reference/java/time/temporal/Temporal` | ` https://developer.android.com/reference/java/time/temporal/Temporal#with(java.time.temporal.TemporalAdjuster)(https://developer.android.com/reference/java/time/temporal/TemporalAdjuster adjuster) ` Returns an adjusted object of the same type as this object with the adjustment made. | ||
| From interface ` https://developer.android.com/reference/java/time/temporal/TemporalAccessor ` |---|---| | ` default int` | ` https://developer.android.com/reference/java/time/temporal/TemporalAccessor#get(java.time.temporal.TemporalField)(https://developer.android.com/reference/java/time/temporal/TemporalField field) ` Gets the value of the specified field as an `int`. | | ` abstract long` | ` https://developer.android.com/reference/java/time/temporal/TemporalAccessor#getLong(java.time.temporal.TemporalField)(https://developer.android.com/reference/java/time/temporal/TemporalField field) ` Gets the value of the specified field as a `long`. | | ` abstract boolean` | ` https://developer.android.com/reference/java/time/temporal/TemporalAccessor#isSupported(java.time.temporal.TemporalField)(https://developer.android.com/reference/java/time/temporal/TemporalField field) ` Checks if the specified field is supported. | | ` default <R> R` | ` https://developer.android.com/reference/java/time/temporal/TemporalAccessor#query(java.time.temporal.TemporalQuery<R>)(https://developer.android.com/reference/java/time/temporal/TemporalQuery<R> query) ` Queries this date-time. | | ` default https://developer.android.com/reference/java/time/temporal/ValueRange` | ` https://developer.android.com/reference/java/time/temporal/TemporalAccessor#range(java.time.temporal.TemporalField)(https://developer.android.com/reference/java/time/temporal/TemporalField field) ` Gets the range of valid values for the specified field. | ||

## Public methods

### compareTo

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int compareTo (ChronoZonedDateTime<?> other)
```

Compares this date-time to another date-time, including the chronology.


The comparison is based first on the instant, then on the local date-time,
then on the zone ID, then on the chronology.
It is "consistent with equals", as defined by `https://developer.android.com/reference/java/lang/Comparable`.


If all the date-time objects being compared are in the same chronology, then the
additional chronology stage is not required.


This default implementation performs the comparison defined above.

<br />

| Parameters ||
|---|---|
| `other` | `ChronoZonedDateTime`: the other date-time to compare to, not null <br /> |

| Returns ||
|---|---|
| `int` | the comparator value, that is the comparison of this with the `other` values for the instant, the local date-time, the zone ID, and the chronology, in order, returning the first non-zero result, and otherwise returning zero <br /> |

**See also:**

- `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isBefore(java.time.chrono.ChronoZonedDateTime<?>)`
- `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isAfter(java.time.chrono.ChronoZonedDateTime<?>)`

### equals

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract boolean equals (Object obj)
```

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


The comparison is based on the offset date-time and the zone.
To compare for the same instant on the time-line, use `https://developer.android.com/reference/java/lang/Comparable#compareTo(T)`.
Only objects of type `ChronoZonedDateTime` are compared, other types return false.

<br />

| Parameters ||
|---|---|
| `obj` | `Object`: the object to check, null returns false <br /> |

| Returns ||
|---|---|
| `boolean` | true if this is equal to the other date-time <br /> |

### format

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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.


The default implementation must behave as follows:

```
 return formatter.format(this);
```

<br />

<br />

| Parameters ||
|---|---|
| `formatter` | `DateTimeFormatter`: the formatter to use, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | the formatted date-time string, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/time/DateTimeException` | if an error occurs during printing |

### from

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static ChronoZonedDateTime<?> from (TemporalAccessor temporal)
```

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


This creates a zoned 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 `ChronoZonedDateTime`.


The conversion extracts and combines the chronology, date, time and zone
from the temporal object. The behavior is equivalent to using
`https://developer.android.com/reference/java/time/chrono/Chronology#zonedDateTime(java.time.temporal.TemporalAccessor)` with the extracted chronology.
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 `https://developer.android.com/reference/java/time/temporal/TemporalQuery`
allowing it to be used as a query via method reference, `ChronoZonedDateTime::from`.

<br />

| Parameters ||
|---|---|
| `temporal` | `TemporalAccessor`: the temporal object to convert, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?>` | the date-time, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/time/DateTimeException` | if unable to convert to a `ChronoZonedDateTime` |

**See also:**

- `https://developer.android.com/reference/java/time/chrono/Chronology#zonedDateTime(java.time.temporal.TemporalAccessor)`

### get

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int get (TemporalField field)
```

Gets the value of the specified field as an `int`.


This queries the 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 the date-time cannot return the value, because the field is unsupported or for
some other reason, an exception will be thrown.

<br />

| Parameters ||
|---|---|
| `field` | `TemporalField`: the field to get, not null <br /> |

| Returns ||
|---|---|
| `int` | the value for the field, within the valid range of values <br /> |

### getChronology

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Chronology getChronology ()
```

Gets the chronology of this date-time.


The `Chronology` represents the calendar system in use.
The era and other fields in `https://developer.android.com/reference/java/time/temporal/ChronoField` are defined by the chronology.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/Chronology` | the chronology, not null <br /> |

### getLong

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public long getLong (TemporalField field)
```

Gets the value of the specified field as a `long`.


This queries the date-time for the value of the specified field.
The returned value may be outside the valid range of values for the field.
If the date-time cannot return the value, because the field is unsupported or for
some other reason, an exception will be thrown.

<br />

| Parameters ||
|---|---|
| `field` | `TemporalField`: the field to get, not null <br /> |

| Returns ||
|---|---|
| `long` | the value for the field <br /> |

### getOffset

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ZoneOffset getOffset ()
```

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


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

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/ZoneOffset` | the zone offset, not null <br /> |

### getZone

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ZoneId getZone ()
```

Gets the zone ID, such as 'Europe/Paris'.


This returns the stored time-zone id used to determine the time-zone rules.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/ZoneId` | the zone ID, not null <br /> |

### hashCode

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract int hashCode ()
```

A hash code for this date-time.

<br />

| Returns ||
|---|---|
| `int` | a suitable hash code <br /> |

### isAfter

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean isAfter (ChronoZonedDateTime<?> other)
```

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


This method differs from the comparison in `https://developer.android.com/reference/java/lang/Comparable#compareTo(T)` in that it
only compares the instant of the date-time. This is equivalent to using
`dateTime1.toInstant().isAfter(dateTime2.toInstant());`.


This default implementation performs the comparison based on the epoch-second
and nano-of-second.

<br />

| Parameters ||
|---|---|
| `other` | `ChronoZonedDateTime`: the other date-time to compare to, not null <br /> |

| Returns ||
|---|---|
| `boolean` | true if this is after the specified date-time <br /> |

### isBefore

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean isBefore (ChronoZonedDateTime<?> other)
```

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


This method differs from the comparison in `https://developer.android.com/reference/java/lang/Comparable#compareTo(T)` in that it
only compares the instant of the date-time. This is equivalent to using
`dateTime1.toInstant().isBefore(dateTime2.toInstant());`.


This default implementation performs the comparison based on the epoch-second
and nano-of-second.

<br />

| Parameters ||
|---|---|
| `other` | `ChronoZonedDateTime`: the other date-time to compare to, not null <br /> |

| Returns ||
|---|---|
| `boolean` | true if this point is before the specified date-time <br /> |

### isEqual

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public boolean isEqual (ChronoZonedDateTime<?> 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 `https://developer.android.com/reference/java/lang/Comparable#compareTo(T)` and `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#equals(java.lang.Object)`
in that it only compares the instant of the date-time. This is equivalent to using
`dateTime1.toInstant().equals(dateTime2.toInstant());`.


This default implementation performs the comparison based on the epoch-second
and nano-of-second.

<br />

| Parameters ||
|---|---|
| `other` | `ChronoZonedDateTime`: the other date-time to compare to, not null <br /> |

| Returns ||
|---|---|
| `boolean` | true if the instant equals the instant of the specified date-time <br /> |

### isSupported

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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 `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#plus(long,%20java.time.temporal.TemporalUnit)` and
`https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#minus(long,%20java.time.temporal.TemporalUnit)` methods will throw an exception.


The set of supported units is defined by the chronology and normally includes
all `ChronoUnit` units except `FOREVER`.


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.

<br />

| Parameters ||
|---|---|
| `unit` | `TemporalUnit`: the unit to check, null returns false <br /> |

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

### isSupported

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract boolean isSupported (TemporalField field)
```

Checks if the specified field is supported.


This checks if the specified field can be queried on this date-time.
If false, then calling the `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#range(java.time.temporal.TemporalField)`,
`https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#get(java.time.temporal.TemporalField)` and `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#with(java.time.temporal.TemporalField,%20long)`
methods will throw an exception.


The set of supported fields is defined by the chronology and normally includes
all `ChronoField` fields.


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.

<br />

| Parameters ||
|---|---|
| `field` | `TemporalField`: the field to check, null returns false <br /> |

| Returns ||
|---|---|
| `boolean` | true if the field can be queried, false if not <br /> |

### minus

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public ChronoZonedDateTime<D> minus (TemporalAmount amount)
```

Returns an object of the same type as this object with an amount subtracted.


This adjusts this temporal, subtracting according to the rules of the specified amount.
The amount is typically a `https://developer.android.com/reference/java/time/Period` but may be any other type implementing
the `https://developer.android.com/reference/java/time/temporal/TemporalAmount` interface, such as `https://developer.android.com/reference/java/time/Duration`.


Some example code indicating how and why this method is used:

```
 date = date.minus(period);               // subtract a Period instance
 date = date.minus(duration);             // subtract a Duration instance
 date = date.minus(workingDays(6));       // example user-written workingDays method
```


Note that calling `plus` followed by `minus` is not guaranteed to
return the same date-time.

<br />

| Parameters ||
|---|---|
| `amount` | `TemporalAmount`: the amount to subtract, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | an object of the same type with the specified adjustment made, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` |   |
| `https://developer.android.com/reference/java/time/DateTimeException` |   |

### minus

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public ChronoZonedDateTime<D> minus (long amountToSubtract, 
                TemporalUnit unit)
```

Returns an object of the same type as this object with the specified period subtracted.


This method returns a new object based on this one with the specified period subtracted.
For example, on a `LocalDate`, this could be used to subtract a number of years, months or days.
The returned object will have the same observable type as this object.


In some cases, changing a field is not fully defined. For example, if the target object is
a date representing the 31st March, then subtracting one month would be unclear.
In cases like this, the field is responsible for resolving the result. Typically it will choose
the previous valid date, which would be the last valid day of February in this example.

<br />

| Parameters ||
|---|---|
| `amountToSubtract` | `long`: the amount of the specified unit to subtract, may be negative <br /> |
| `unit` | `TemporalUnit`: the unit of the amount to subtract, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | an object of the same type with the specified period subtracted, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` |   |
| `https://developer.android.com/reference/java/time/DateTimeException` |   |

### plus

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public ChronoZonedDateTime<D> plus (TemporalAmount amount)
```

Returns an object of the same type as this object with an amount added.


This adjusts this temporal, adding according to the rules of the specified amount.
The amount is typically a `https://developer.android.com/reference/java/time/Period` but may be any other type implementing
the `https://developer.android.com/reference/java/time/temporal/TemporalAmount` interface, such as `https://developer.android.com/reference/java/time/Duration`.


Some example code indicating how and why this method is used:

```
 date = date.plus(period);                // add a Period instance
 date = date.plus(duration);              // add a Duration instance
 date = date.plus(workingDays(6));        // example user-written workingDays method
```


Note that calling `plus` followed by `minus` is not guaranteed to
return the same date-time.

<br />

| Parameters ||
|---|---|
| `amount` | `TemporalAmount`: the amount to add, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | an object of the same type with the specified adjustment made, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` |   |
| `https://developer.android.com/reference/java/time/DateTimeException` |   |

### plus

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ChronoZonedDateTime<D> plus (long amountToAdd, 
                TemporalUnit unit)
```

Returns an object of the same type as this object with the specified period added.


This method returns a new object based on this one with the specified period added.
For example, on a `LocalDate`, this could be used to add a number of years, months or days.
The returned object will have the same observable type as this object.


In some cases, changing a field is not fully defined. For example, if the target object is
a date representing the 31st January, then adding one month would be unclear.
In cases like this, the field is responsible for resolving the result. Typically it will choose
the previous valid date, which would be the last valid day of February in this example.

<br />

| Parameters ||
|---|---|
| `amountToAdd` | `long`: the amount of the specified unit to add, may be negative <br /> |
| `unit` | `TemporalUnit`: the unit of the amount to add, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | an object of the same type with the specified period added, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` |   |
| `https://developer.android.com/reference/java/time/DateTimeException` |   |

### query

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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
`https://developer.android.com/reference/java/time/temporal/TemporalQuery#queryFrom(java.time.temporal.TemporalAccessor)` method on the
specified query passing `this` as the argument.

<br />

| Parameters ||
|---|---|
| `query` | `TemporalQuery`: the query to invoke, not null <br /> |

| Returns ||
|---|---|
| `R` | the query result, null may be returned (defined by the query) <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` | if numeric overflow occurs (defined by the query) |
| `https://developer.android.com/reference/java/time/DateTimeException` | if unable to query (defined by the query) |

### range

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public ValueRange range (TemporalField field)
```

Gets the range of valid values for the specified field.


All fields can be expressed as a `long` integer.
This method returns an object that describes the valid range for that value.
The value of this temporal object is used to enhance the accuracy of the returned range.
If the date-time cannot return the range, because the field is unsupported or for
some other reason, an exception will be thrown.


Note that the result only describes the minimum and maximum valid values
and it is important not to read too much into them. For example, there
could be values within the range that are invalid for the field.

<br />

| Parameters ||
|---|---|
| `field` | `TemporalField`: the field to query the range for, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/temporal/ValueRange` | the range of valid values for the field, not null <br /> |

### timeLineOrder

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static Comparator<ChronoZonedDateTime<?>> timeLineOrder ()
```

Gets a comparator that compares `ChronoZonedDateTime` in
time-line order ignoring the chronology.


This comparator differs from the comparison in `https://developer.android.com/reference/java/lang/Comparable#compareTo(T)` in that it
only compares the underlying instant and not the chronology.
This allows dates in different calendar systems to be compared based
on the position of the date-time on the instant time-line.
The underlying comparison is equivalent to comparing the epoch-second and nano-of-second.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/Comparator<https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<?>>` | a comparator that compares in time-line order ignoring the chronology <br /> |

**See also:**

- `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isAfter(java.time.chrono.ChronoZonedDateTime<?>)`
- `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isBefore(java.time.chrono.ChronoZonedDateTime<?>)`
- `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#isEqual(java.time.chrono.ChronoZonedDateTime<?>)`

### toEpochSecond

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public long toEpochSecond ()
```

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


This uses the [local date-time](https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#toLocalDateTime()) and
[offset](https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#getOffset()) 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.

<br />

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

### toInstant

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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. The calculation combines the
[local date-time](https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#toLocalDateTime()) and
[offset](https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#getOffset()).

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/Instant` | an `Instant` representing the same instant, not null <br /> |

### toLocalDate

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public D toLocalDate ()
```

Gets the local date part of this date-time.


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

<br />

| Returns ||
|---|---|
| `D` | the date part of this date-time, not null <br /> |

### toLocalDateTime

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ChronoLocalDateTime<D> toLocalDateTime ()
```

Gets the local date-time part of this date-time.


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

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoLocalDateTime<D>` | the local date-time part of this date-time, not null <br /> |

### toLocalTime

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public LocalTime toLocalTime ()
```

Gets the local time part of this date-time.


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

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/LocalTime` | the time part of this date-time, not null <br /> |

### toString

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract String toString ()
```

Outputs this date-time as a `String`.


The output will include the full zoned date-time.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | a string representation of this date-time, not null <br /> |

### with

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ChronoZonedDateTime<D> with (TemporalField field, 
                long newValue)
```

Returns an object of the same type as this object with the specified field altered.


This returns a new object based on this one with the value for the specified field changed.
For example, on a `LocalDate`, this could be used to set the year, month or day-of-month.
The returned object will have the same observable type as this object.


In some cases, changing a field is not fully defined. For example, if the target object is
a date representing the 31st January, then changing the month to February would be unclear.
In cases like this, the field is responsible for resolving the result. Typically it will choose
the previous valid date, which would be the last valid day of February in this example.

<br />

| Parameters ||
|---|---|
| `field` | `TemporalField`: the field to set in the result, not null <br /> |
| `newValue` | `long`: the new value of the field in the result <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | an object of the same type with the specified field set, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` |   |
| `https://developer.android.com/reference/java/time/DateTimeException` |   |

### with

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public ChronoZonedDateTime<D> with (TemporalAdjuster adjuster)
```

Returns an adjusted object of the same type as this object with the adjustment made.


This adjusts this date-time according to the rules of the specified adjuster.
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
`https://developer.android.com/reference/java/time/temporal/TemporalAdjusters`.
These include finding the "last day of the month" and "next Wednesday".
The adjuster is responsible for handling special cases, such as the varying
lengths of month and leap years.


Some example code indicating how and why this method is used:

```
 date = date.with(Month.JULY);        // most key classes implement TemporalAdjuster
 date = date.with(lastDayOfMonth());  // static import from Adjusters
 date = date.with(next(WEDNESDAY));   // static import from Adjusters and DayOfWeek
```

<br />

<br />

| Parameters ||
|---|---|
| `adjuster` | `TemporalAdjuster`: the adjuster to use, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | an object of the same type with the specified adjustment made, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/ArithmeticException` |   |
| `https://developer.android.com/reference/java/time/DateTimeException` |   |

### withEarlierOffsetAtOverlap

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ChronoZonedDateTime<D> withEarlierOffsetAtOverlap ()
```

Returns a copy of this date-time changing the zone offset to the
earlier of the two valid offsets at a local time-line overlap.


This method only has any effect when the local time-line overlaps, such as
at an autumn daylight savings cutover. In this scenario, there are two
valid offsets for the local date-time. Calling this method will return
a zoned date-time with the earlier of the two selected.


If this method is called when it is not an overlap, `this`
is returned.


This instance is immutable and unaffected by this method call.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | a `ChronoZonedDateTime` based on this date-time with the earlier offset, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/time/DateTimeException` | if no rules can be found for the zone |
| `https://developer.android.com/reference/java/time/DateTimeException` | if no rules are valid for this date-time |

### withLaterOffsetAtOverlap

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ChronoZonedDateTime<D> withLaterOffsetAtOverlap ()
```

Returns a copy of this date-time changing the zone offset to the
later of the two valid offsets at a local time-line overlap.


This method only has any effect when the local time-line overlaps, such as
at an autumn daylight savings cutover. In this scenario, there are two
valid offsets for the local date-time. Calling this method will return
a zoned date-time with the later of the two selected.


If this method is called when it is not an overlap, `this`
is returned.


This instance is immutable and unaffected by this method call.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | a `ChronoZonedDateTime` based on this date-time with the later offset, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/time/DateTimeException` | if no rules can be found for the zone |
| `https://developer.android.com/reference/java/time/DateTimeException` | if no rules are valid for this date-time |

### withZoneSameInstant

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ChronoZonedDateTime<D> withZoneSameInstant (ZoneId zone)
```

Returns a copy of this date-time with a different time-zone,
retaining the instant.


This method changes the time-zone and retains the instant.
This normally results in a change to the local date-time.


This method is based on retaining the same instant, thus gaps and overlaps
in the local time-line have no effect on the result.


To change the offset while keeping the local time,
use `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#withZoneSameLocal(java.time.ZoneId)`.

<br />

| Parameters ||
|---|---|
| `zone` | `ZoneId`: the time-zone to change to, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | a `ChronoZonedDateTime` based on this date-time with the requested zone, not null <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/time/DateTimeException` | if the result exceeds the supported date range |

### withZoneSameLocal

Added in [API level 26](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public abstract ChronoZonedDateTime<D> withZoneSameLocal (ZoneId zone)
```

Returns a copy of this date-time with a different time-zone,
retaining the local date-time if possible.


This method changes the time-zone and retains the local date-time.
The local date-time is only changed if it is invalid for the new zone.


To change the zone and adjust the local date-time,
use `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime#withZoneSameInstant(java.time.ZoneId)`.


This instance is immutable and unaffected by this method call.

<br />

| Parameters ||
|---|---|
| `zone` | `ZoneId`: the time-zone to change to, not null <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/time/chrono/ChronoZonedDateTime<D>` | a `ChronoZonedDateTime` based on this date-time with the requested zone, not null <br /> |