Class TimeZone.ConstantZone

java.lang.Object

com.ibm.icu.util.TimeZone

com.ibm.icu.util.TimeZone.ConstantZone

All Implemented Interfaces:

Freezable<TimeZone>, Serializable, Cloneable

Enclosing class:

TimeZone

private static final class TimeZone.ConstantZone
extends TimeZone

Nested Class Summary

Nested classes/interfaces inherited from class TimeZone

TimeZone.SystemTimeZoneType

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	isFrozen
private int	rawOffset
private static final long	serialVersionUID

Fields inherited from class TimeZone

GENERIC_LOCATION, GMT_ZONE, GMT_ZONE_ID, LONG, LONG_GENERIC, LONG_GMT, SHORT, SHORT_COMMONLY_USED, SHORT_GENERIC, SHORT_GMT, TIMEZONE_ICU, TIMEZONE_JDK, UNKNOWN_ZONE, UNKNOWN_ZONE_ID

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ConstantZone(int rawOffset, String ID)

Method Summary

Modifier and Type	Method	Description
TimeZone	cloneAsThawed()	Provides for the clone operation.
TimeZone	freeze()	Freezes the object.
int	getOffset(int era, int year, int month, int day, int dayOfWeek, int milliseconds)	Gets the time zone offset, for current date, modified in case of daylight savings.
int	getRawOffset()	Gets unmodified offset, NOT modified in case of daylight savings.
boolean	inDaylightTime(Date date)	Queries if the given date is in daylight savings time in this time zone.
boolean	isFrozen()	Determines whether the object has been frozen or not.
void	setRawOffset(int offsetMillis)	Sets the base time zone offset to GMT.
boolean	useDaylightTime()	Queries if this time zone uses daylight savings time.

Methods inherited from class TimeZone

clone, countEquivalentIDs, equals, forLocaleOrDefault, forULocaleOrDefault, getAvailableIDs, getAvailableIDs, getAvailableIDs, getAvailableIDs, getCanonicalID, getCanonicalID, getDefault, getDefaultTimeZoneType, getDisplayName, getDisplayName, getDisplayName, getDisplayName, getDisplayName, getDisplayName, getDSTSavings, getEquivalentID, getFrozenICUTimeZone, getFrozenTimeZone, getIanaID, getID, getIDForWindowsID, getOffset, getOffset, getRegion, getTimeZone, getTimeZone, getTZDataVersion, getWindowsID, hashCode, hasSameRules, observesDaylightTime, setDefault, setDefaultTimeZoneType, setICUDefault, setID

Methods inherited from class Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

rawOffset

private int rawOffset

isFrozen

private transient volatile boolean isFrozen

Constructor Details

ConstantZone

private ConstantZone(int rawOffset,
 String ID)

Method Details

getOffset

public int getOffset(int era,
 int year,
 int month,
 int day,
 int dayOfWeek,
 int milliseconds)

Description copied from class: TimeZone

Gets the time zone offset, for current date, modified in case of daylight savings. This is the offset to add to UTC to get local time.

Specified by:

getOffset in class TimeZone

Parameters:

era - the era of the given date.

year - the year in the given date.

month - the month in the given date. Month is 0-based. e.g., 0 for January.

day - the day-in-month of the given date.

dayOfWeek - the day-of-week of the given date.

milliseconds - the millis in day in standard local time.

Returns:

the offset to add to GMT to get local time.

setRawOffset

public void setRawOffset(int offsetMillis)

Description copied from class: TimeZone

Sets the base time zone offset to GMT. This is the offset to add to UTC to get local time.

Specified by:

setRawOffset in class TimeZone

Parameters:

offsetMillis - the given base time zone offset to GMT.

getRawOffset

public int getRawOffset()

Description copied from class: TimeZone

Gets unmodified offset, NOT modified in case of daylight savings. This is the offset to add to UTC to get local time.

Specified by:

getRawOffset in class TimeZone

Returns:

the unmodified offset to add to UTC to get local time.

useDaylightTime

public boolean useDaylightTime()

Description copied from class: TimeZone

Queries if this time zone uses daylight savings time.

Specified by:

useDaylightTime in class TimeZone

Returns:

true if this time zone uses daylight savings time, false, otherwise.

Note:The default implementation of ICU TimeZone uses the tz database, which supports historic rule changes, for system time zones. With the implementation, there are time zones that used daylight savings time in the past, but no longer used currently. For example, Asia/Tokyo has never used daylight savings time since 1951. Most clients would expect that this method to return false for such case. The default implementation of this method returns true when the time zone uses daylight savings time in the current (Gregorian) calendar year.

inDaylightTime

public boolean inDaylightTime(Date date)

Description copied from class: TimeZone

Queries if the given date is in daylight savings time in this time zone.

Specified by:

inDaylightTime in class TimeZone

Parameters:

date - the given Date.

Returns:

true if the given date is in daylight savings time, false, otherwise.

isFrozen

public boolean isFrozen()

Description copied from class: TimeZone

Determines whether the object has been frozen or not.

Specified by:

isFrozen in interface Freezable<TimeZone>

Overrides:

isFrozen in class TimeZone

freeze

public TimeZone freeze()

Description copied from class: TimeZone

Freezes the object.

Specified by:

freeze in interface Freezable<TimeZone>

Overrides:

freeze in class TimeZone

Returns:

the object itself.

cloneAsThawed

public TimeZone cloneAsThawed()

Description copied from class: TimeZone

Provides for the clone operation. Any clone is initially unfrozen.

Specified by:

cloneAsThawed in interface Freezable<TimeZone>

Overrides:

cloneAsThawed in class TimeZone