Added in API level 26

ZoneOffset

class ZoneOffset : ZoneId, Comparable<ZoneOffset!>, Serializable, TemporalAccessor, TemporalAdjuster

kotlin.Any
↳	java.time.ZoneId
	↳	java.time.ZoneOffset

A time-zone offset from Greenwich/UTC, such as +02:00.

A time-zone offset is the amount of time that a time-zone differs from Greenwich/UTC. This is usually a fixed number of hours and minutes.

Different parts of the world have different time-zone offsets. The rules for how offsets vary by place and time of year are captured in the ZoneId class.

For example, Paris is one hour ahead of Greenwich/UTC in winter and two hours ahead in summer. The ZoneId instance for Paris will reference two ZoneOffset instances - a +01:00 instance for winter, and a +02:00 instance for summer.

In 2008, time-zone offsets around the world extended from -12:00 to +14:00. To prevent any problems with that range being extended, yet still provide validation, the range of offsets is restricted to -18:00 to 18:00 inclusive.

This class is designed for use with the ISO calendar system. The fields of hours, minutes and seconds make assumptions that are valid for the standard ISO definitions of those fields. This class may be used with other calendar systems providing the definition of the time fields matches those of the ISO calendar system.

Instances of ZoneOffset must be compared using equals. Implementations may choose to cache certain common offsets, however applications must not rely on such caching.

Summary

Public methods
Temporal!	adjustInto(temporal: Temporal!) Adjusts the specified temporal object to have the same offset as this object.
Int	compareTo(other: ZoneOffset!) Compares this offset to another offset in descending order.
Boolean	equals(other: Any?) Checks if this offset is equal to another offset.
static ZoneOffset!	from(temporal: TemporalAccessor!) Obtains an instance of ZoneOffset from a temporal object.
Int	get(field: TemporalField!) Gets the value of the specified field from this offset as an int.
String!	getId() Gets the normalized zone offset ID.
Long	getLong(field: TemporalField!) Gets the value of the specified field from this offset as a long.
ZoneRules!	getRules() Gets the associated time-zone rules.
Int	getTotalSeconds() Gets the total zone offset in seconds.
Int	hashCode() A hash code for this offset.
Boolean	isSupported(field: TemporalField!) Checks if the specified field is supported.
static ZoneOffset!	of(offsetId: String!) Obtains an instance of ZoneOffset using the ID.
static ZoneOffset!	ofHours(hours: Int) Obtains an instance of ZoneOffset using an offset in hours.
static ZoneOffset!	ofHoursMinutes(hours: Int, minutes: Int) Obtains an instance of ZoneOffset using an offset in hours and minutes.
static ZoneOffset!	ofHoursMinutesSeconds(hours: Int, minutes: Int, seconds: Int) Obtains an instance of ZoneOffset using an offset in hours, minutes and seconds.
static ZoneOffset!	ofTotalSeconds(totalSeconds: Int) Obtains an instance of ZoneOffset specifying the total offset in seconds
R	query(query: TemporalQuery<R>!) Queries this offset using the specified query.
ValueRange!	range(field: TemporalField!) Gets the range of valid values for the specified field.
String	toString() Outputs this offset as a String, using the normalized ID.

Inherited functions

From class ZoneId MutableSet<String!>! getAvailableZoneIds() Gets the set of available zone IDs. This set includes the string form of all available region-based IDs. Offset-based zone IDs are not included in the returned set. The ID can be passed to of(java.lang.String) to create a ZoneId. The set of zone IDs can increase over time, although in a typical application the set of IDs is fixed. Each call to this method is thread-safe. String! getDisplayName(style: TextStyle!, locale: Locale!) Gets the textual representation of the zone, such as 'British Time' or '+02:00'. This returns the textual name used to identify the time-zone ID, suitable for presentation to the user. The parameters control the style of the returned text and the locale. If no textual mapping is found then the full ID is returned. ZoneId! normalized() Normalizes the time-zone ID, returning a ZoneOffset where possible. The returns a normalized ZoneId that can be used in place of this ID. The result will have ZoneRules equivalent to those returned by this object, however the ID returned by getId() may be different. The normalization checks if the rules of this ZoneId have a fixed offset. If they do, then the ZoneOffset equal to that offset is returned. Otherwise this is returned. ZoneId! of(zoneId: String!, aliasMap: MutableMap<String!, String!>!) Obtains an instance of ZoneId using its ID using a map of aliases to supplement the standard zone IDs. Many users of time-zones use short abbreviations, such as PST for 'Pacific Standard Time' and PDT for 'Pacific Daylight Time'. These abbreviations are not unique, and so cannot be used as IDs. This method allows a map of string to time-zone to be setup and reused within an application. ZoneId! ofOffset(prefix: String!, offset: ZoneOffset!) Obtains an instance of ZoneId wrapping an offset. If the prefix is "GMT", "UTC", or "UT" a ZoneId with the prefix and the non-zero offset is returned. If the prefix is empty "" the ZoneOffset is returned. ZoneId! systemDefault() Gets the system default time-zone. This queries TimeZone.getDefault() to find the default time-zone and converts it to a ZoneId. If the system default time-zone is changed, then the result of this method will also change.

Properties
static ZoneOffset!	MAX Constant for the maximum supported offset.
static ZoneOffset!	MIN Constant for the minimum supported offset.
static ZoneOffset!	UTC The time-zone offset for UTC, with an ID of 'Z'.

Inherited properties

From class ZoneId MutableMap<String!, String!>! SHORT_IDS A map of zone overrides to enable the short time-zone names to be used. Use of short zone IDs has been deprecated in java.util.TimeZone. This map allows the IDs to continue to be used via the of(java.lang.String,java.util.Map) factory method. This map contains a mapping of the IDs that is in line with TZDB 2005r and later, where 'EST', 'MST' and 'HST' map to IDs which do not include daylight savings. This maps as follows: EST - -05:00 HST - -10:00 MST - -07:00 ACT - Australia/Darwin AET - Australia/Sydney AGT - America/Argentina/Buenos_Aires ART - Africa/Cairo AST - America/Anchorage BET - America/Sao_Paulo BST - Asia/Dhaka CAT - Africa/Harare CNT - America/St_Johns CST - America/Chicago CTT - Asia/Shanghai EAT - Africa/Addis_Ababa ECT - Europe/Paris IET - America/Indiana/Indianapolis IST - Asia/Kolkata JST - Asia/Tokyo MIT - Pacific/Apia NET - Asia/Yerevan NST - Pacific/Auckland PLT - Asia/Karachi PNT - America/Phoenix PRT - America/Puerto_Rico PST - America/Los_Angeles SST - Pacific/Guadalcanal VST - Asia/Ho_Chi_Minh The map is unmodifiable.

Public methods

adjustInto

Added in API level 26

fun adjustInto(temporal: Temporal!): Temporal!

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

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

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

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

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

This instance is immutable and unaffected by this method call.

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

Return
Temporal!	the adjusted object, not null

Exceptions
java.time.DateTimeException	if unable to make the adjustment
java.lang.ArithmeticException	if numeric overflow occurs

compareTo

Added in API level 26

fun compareTo(other: ZoneOffset!): Int

Compares this offset to another offset in descending order.

The offsets are compared in the order that they occur for the same time of day around the world. Thus, an offset of +10:00 comes before an offset of +09:00 and so on down to -18:00.

The comparison is "consistent with equals", as defined by Comparable.

Parameters
o	the object to be compared.
other	ZoneOffset!: the other date to compare to, not null

Return
Int	the comparator value, negative if less, positive if greater

Exceptions
java.lang.NullPointerException	if other is null
java.lang.ClassCastException	if the specified object's type prevents it from being compared to this object.

equals

Added in API level 26

fun equals(other: Any?): Boolean

Checks if this offset is equal to another offset.

The comparison is based on the amount of the offset in seconds. This is equivalent to a comparison by ID.

Parameters
obj	the object to check, null returns false

Return
Boolean	true if this is equal to the other offset

from

Added in API level 26

static fun from(temporal: TemporalAccessor!): ZoneOffset!

Obtains an instance of ZoneOffset from a temporal object.

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

A TemporalAccessor represents some form of date and time information. This factory converts the arbitrary temporal object to an instance of ZoneOffset.

The conversion uses the TemporalQueries.offset() query, which relies on extracting the OFFSET_SECONDS field.

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

Parameters
temporal	TemporalAccessor!: the temporal object to convert, not null

Return
ZoneOffset!	the zone-offset, not null

Exceptions
java.time.DateTimeException	if unable to convert to an ZoneOffset

get

Added in API level 26

fun get(field: TemporalField!): Int

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

This queries this offset 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 OFFSET_SECONDS field returns the value of the offset. 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

Return
Int	the value for the field

Exceptions
java.time.DateTimeException	if a value for the field cannot be obtained or the value is outside the range of valid values for the field
java.time.temporal.UnsupportedTemporalTypeException	if the field is not supported or the range of values exceeds an int
java.lang.ArithmeticException	if numeric overflow occurs

getId

Added in API level 26

fun getId(): String!

Gets the normalized zone offset ID.

The ID is minor variation to the standard ISO-8601 formatted string for the offset. There are three formats:

• Z - for UTC (ISO-8601)
• +hh:mm or -hh:mm - if the seconds are zero (ISO-8601)
• +hh:mm:ss or -hh:mm:ss - if the seconds are non-zero (not ISO-8601)

Return
String!	the zone offset ID, not null

getLong

Added in API level 26

fun getLong(field: TemporalField!): Long

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

This queries this offset 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 OFFSET_SECONDS field returns the value of the offset. 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

Return
Long	the value for the field

Exceptions
java.time.DateTimeException	if a value for the field cannot be obtained
java.time.temporal.UnsupportedTemporalTypeException	if the field is not supported
java.lang.ArithmeticException	if numeric overflow occurs

getRules

Added in API level 26

fun getRules(): ZoneRules!

Gets the associated time-zone rules.

The rules will always return this offset when queried. The implementation class is immutable, thread-safe and serializable.

Return
ZoneRules!	the rules, not null

Exceptions
java.time.zone.ZoneRulesException	if no rules are available for this ID

getTotalSeconds

Added in API level 26

fun getTotalSeconds(): Int

Gets the total zone offset in seconds.

This is the primary way to access the offset amount. It returns the total of the hours, minutes and seconds fields as a single offset that can be added to a time.

Return
Int	the total zone offset amount in seconds

hashCode

Added in API level 26

fun hashCode(): Int

A hash code for this offset.

Return
Int	a suitable hash code

isSupported

Added in API level 26

fun isSupported(field: TemporalField!): Boolean

Checks if the specified field is supported.

This checks if this offset can be queried for the specified field. If false, then calling the range and get methods will throw an exception.

If the field is a ChronoField then the query is implemented here. The OFFSET_SECONDS field returns true. 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

Return
Boolean	true if the field is supported on this offset, false if not

of

Added in API level 26

static fun of(offsetId: String!): ZoneOffset!

Obtains an instance of ZoneOffset using the ID.

This method parses the string ID of a ZoneOffset to return an instance. The parsing accepts all the formats generated by getId(), plus some additional formats:

• Z - for UTC
• +h
• +hh
• +hh:mm
• -hh:mm
• +hhmm
• -hhmm
• +hh:mm:ss
• -hh:mm:ss
• +hhmmss
• -hhmmss

Note that ± means either the plus or minus symbol.

The ID of the returned offset will be normalized to one of the formats described by getId().

The maximum supported range is from +18:00 to -18:00 inclusive.

Parameters
offsetId	String!: the offset ID, not null

Return
ZoneOffset!	the zone-offset, not null

Exceptions
java.time.DateTimeException	if the offset ID is invalid

ofHours

Added in API level 26

static fun ofHours(hours: Int): ZoneOffset!

Obtains an instance of ZoneOffset using an offset in hours.

Parameters
hours	Int: the time-zone offset in hours, from -18 to +18

Return
ZoneOffset!	the zone-offset, not null

Exceptions
java.time.DateTimeException	if the offset is not in the required range

ofHoursMinutes

Added in API level 26

static fun ofHoursMinutes(
    hours: Int, 
    minutes: Int
): ZoneOffset!

Obtains an instance of ZoneOffset using an offset in hours and minutes.

The sign of the hours and minutes components must match. Thus, if the hours is negative, the minutes must be negative or zero. If the hours is zero, the minutes may be positive, negative or zero.

Parameters
hours	Int: the time-zone offset in hours, from -18 to +18
minutes	Int: the time-zone offset in minutes, from 0 to ±59, sign matches hours

Return
ZoneOffset!	the zone-offset, not null

Exceptions
java.time.DateTimeException	if the offset is not in the required range

ofHoursMinutesSeconds

Added in API level 26

static fun ofHoursMinutesSeconds(
    hours: Int, 
    minutes: Int, 
    seconds: Int
): ZoneOffset!

Obtains an instance of ZoneOffset using an offset in hours, minutes and seconds.

The sign of the hours, minutes and seconds components must match. Thus, if the hours is negative, the minutes and seconds must be negative or zero.

Parameters
hours	Int: the time-zone offset in hours, from -18 to +18
minutes	Int: the time-zone offset in minutes, from 0 to ±59, sign matches hours and seconds
seconds	Int: the time-zone offset in seconds, from 0 to ±59, sign matches hours and minutes

Return
ZoneOffset!	the zone-offset, not null

Exceptions
java.time.DateTimeException	if the offset is not in the required range

ofTotalSeconds

Added in API level 26

static fun ofTotalSeconds(totalSeconds: Int): ZoneOffset!

Obtains an instance of ZoneOffset specifying the total offset in seconds

The offset must be in the range -18:00 to +18:00, which corresponds to -64800 to +64800.

Parameters
totalSeconds	Int: the total time-zone offset in seconds, from -64800 to +64800

Return
ZoneOffset!	the ZoneOffset, not null

Exceptions
java.time.DateTimeException	if the offset is not in the required range

query

Added in API level 26

fun <R : Any!> query(query: TemporalQuery<R>!): R

Queries this offset using the specified query.

This queries this offset 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
<R>	the type of the result
query	TemporalQuery<R>!: the query to invoke, not null

Return
R	the query result, null may be returned (defined by the query)

Exceptions
java.time.DateTimeException	if unable to query (defined by the query)
java.lang.ArithmeticException	if numeric overflow occurs (defined by the query)

range

Added in API level 26

fun range(field: TemporalField!): ValueRange!

Gets the range of valid values for the specified field.

The range object expresses the minimum and maximum valid values for a field. This offset 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

Return
ValueRange!	the range of valid values for the field, not null

Exceptions
java.time.DateTimeException	if the range for the field cannot be obtained
java.time.temporal.UnsupportedTemporalTypeException	if the field is not supported

toString

Added in API level 26

fun toString(): String

Outputs this offset as a String, using the normalized ID.

Return
String	a string representation of this offset, not null

Properties

MAX

Added in API level 26

static val MAX: ZoneOffset!

Constant for the maximum supported offset.

MIN

Added in API level 26

static val MIN: ZoneOffset!

Constant for the minimum supported offset.

UTC

Added in API level 26

static val UTC: ZoneOffset!

The time-zone offset for UTC, with an ID of 'Z'.