Package com.google.gwt.i18n.client

Class TimeZone

java.lang.Object
com.google.gwt.i18n.client.TimeZone
All Implemented Interfaces:
TimeZone
public class TimeZone extends Object implements TimeZone
The TimeZone class implements a time zone information source for client applications. The time zone object is instantiated from a TimeZoneData object, which is made from a JSON string that contains all the data needed for the specified time zone. Applications can instantiate a time zone statically, in which case the data could be retrieved from the TimeZoneConstants class. Applications can also choose to instantiate from a string obtained from a server. The time zone string contains locale specific data. If the application only uses a short representation, the English data will usually satisfy the user's need. In the case that only the time zone offset is known, there is a decent fallback that only uses the time zone offset to create a TimeZone object.

  • Method Details

    • createTimeZone

      public static TimeZone createTimeZone(int timeZoneOffsetInMinutes)
      This factory method provides a decent fallback to create a time zone object just based on a given time zone offset.
      Parameters:
      timeZoneOffsetInMinutes - time zone offset in minutes
      Returns:
      a new time zone object

    • createTimeZone

      public static TimeZone createTimeZone(String tzJSON)
      This factory method creates a time zone instance from a JSON string that contains the time zone information for desired time zone. Applications can get such a string from the TimeZoneConstants class, or it can request the string from the server. Either way, the application obtains the original string from the data provided in the TimeZoneConstant.properties file, which was carefully prepared from CLDR and Olson time zone database.
      Parameters:
      tzJSON - JSON string that contains time zone data
      Returns:
      a new time zone object

    • createTimeZone

      public static TimeZone createTimeZone(TimeZoneInfo timezoneData)

    • getDaylightAdjustment

      public int getDaylightAdjustment(Date date)
      Description copied from interface: TimeZone
      Returns the daylight savings time adjustment, in minutes, for the given date. If daylight savings time is in effect on the given date, the number will be positive, otherwise 0.
      Specified by:
      getDaylightAdjustment in interface TimeZone
      Parameters:
      date - the date to check
      Returns:
      offset amount

    • getGMTString

      public String getGMTString(Date date)
      Description copied from interface: TimeZone
      Returns the GMT representation of this time zone object.
      Specified by:
      getGMTString in interface TimeZone
      Parameters:
      date - The date from which the time information should be extracted
      Returns:
      A GMT representation of the time given by the date

    • getID

      public String getID()
      Description copied from interface: TimeZone
      Returns time zone id for this time zone. For time zone objects that have been instantiated from a time zone offset, the POSIX time zone id will be returned.
      Specified by:
      getID in interface TimeZone
      Returns:
      time zone id

    • getISOTimeZoneString

      public String getISOTimeZoneString(Date date)
      Description copied from interface: TimeZone
      To get ISO-style (+00:00) representation of the time zone for given date.
      Specified by:
      getISOTimeZoneString in interface TimeZone
      Parameters:
      date - The date for which time to retrieve RFC time zone string
      Returns:
      ISO-style time zone string

    • getLongName

      public String getLongName(Date date)
      Description copied from interface: TimeZone
      Returns the long version of the time zone name for the given date; the result of this method will be different if daylight savings time is in effect.
      Specified by:
      getLongName in interface TimeZone
      Parameters:
      date - The date for which the long time zone name is returned
      Returns:
      long time zone name

    • getOffset

      public int getOffset(Date date)
      Description copied from interface: TimeZone
      Returns the RFC representation of the time zone name for the given date. To be consistent with JDK/Javascript API, west of Greenwich will be positive.
      Specified by:
      getOffset in interface TimeZone
      Parameters:
      date - The date for which time to retrieve time zone offset
      Returns:
      time zone offset in minutes

    • getRFCTimeZoneString

      public String getRFCTimeZoneString(Date date)
      Description copied from interface: TimeZone
      To get RFC representation of certain time zone name for given date.
      Specified by:
      getRFCTimeZoneString in interface TimeZone
      Parameters:
      date - The date for which time to retrieve RFC time zone string
      Returns:
      RFC time zone string

    • getShortName

      public String getShortName(Date date)
      Description copied from interface: TimeZone
      Returns the short time zone name for a given date.
      Specified by:
      getShortName in interface TimeZone
      Parameters:
      date - The date for which time to retrieve short time zone
      Returns:
      short time zone name

    • getStandardOffset

      public int getStandardOffset()
      Description copied from interface: TimeZone
      Returns the standard time zone offset, in minutes.
      Specified by:
      getStandardOffset in interface TimeZone

    • isDaylightTime

      public boolean isDaylightTime(Date date)
      Description copied from interface: TimeZone
      Check whether the given date and time falls within a daylight savings time period.
      Specified by:
      isDaylightTime in interface TimeZone
      Parameters:
      date - and time to check
      Returns:
      true if daylight savings time is in effect