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## java.util
Class TimeZone

    java.lang.Object
      java.util.TimeZone

public abstract class TimeZone
extends Object

`TimeZone` represents a time zone offset, and also figures out daylight savings.

Typically, you get a `TimeZone` using `getDefault` which creates a `TimeZone` based on the time zone where the program is running. For example, for a program running in Japan, `getDefault` creates a `TimeZone` object based on Japanese Standard Time.

You can also get a `TimeZone` using `getTimeZone` along with a time zone ID. For instance, the time zone ID for the Pacific Standard Time zone is "PST". So, you can get a PST `TimeZone` object with:

>      TimeZone tz = TimeZone.getTimeZone("PST");

This class is a pure subset of the java.util.TimeZone class in JDK 1.3.

The only time zone ID that is required to be supported is "GMT".

Apart from the methods and variables being subset, the semantics of the getTimeZone() method may also be subset: custom IDs such as "GMT-8:00" are not required to be supported.

See Also:
  `Calendar`, `Date`

Constructor Summary
`TimeZone()`

Method Summary
`static String[]` | `getAvailableIDs()` Gets all the available IDs supported.
`static TimeZone` | `getDefault()` Gets the default `TimeZone` for this host.
`String` | `getID()` Gets the ID of this time zone.
`abstract int` | `getOffset(int era, int year, int month, int day, int dayOfWeek, int millis)` Gets offset, for current date, modified in case of daylight savings.
`abstract int` | `getRawOffset()` Gets the GMT offset for this time zone.
`static TimeZone` | `getTimeZone(String ID)` Gets the `TimeZone` for the given ID.
`abstract boolean` | `useDaylightTime()` Queries if this time zone uses Daylight Savings Time.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### TimeZone

    public TimeZone()

Method Detail

### getOffset

    public abstract int getOffset(int era,
                                  int year,
                                  int month,
                                  int day,
                                  int dayOfWeek,
                                  int millis)

  Gets offset, for current date, modified in case of daylight savings. This is the offset to add *to* GMT to get local time. Gets the time zone offset, for current date, modified in case of daylight savings. This is the offset to add *to* GMT to get local time. Assume that the start and end month are distinct. This method may return incorrect results for rules that start at the end of February (e.g., last Sunday in February) or the beginning of March (e.g., March 1).

  Parameters:
    `era` - The era of the given date (0 = BC, 1 = AD).
    `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.
    `millis` - The milliseconds in day in standard local time.
  Returns:
    The offset to add *to* GMT to get local time.
  Throws:
    `IllegalArgumentException` - the era, month, day, dayOfWeek, or millis parameters are out of range

### getRawOffset

    public abstract int getRawOffset()

  Gets the GMT offset for this time zone.

  Returns:
    the GMT offset for this time zone.

### useDaylightTime

    public abstract boolean useDaylightTime()

  Queries if this time zone uses Daylight Savings Time.

  Returns:
    if this time zone uses Daylight Savings Time.

### getID

    public String getID()

  Gets the ID of this time zone.

  Returns:
    the ID of this time zone.

### getTimeZone

    public static TimeZone getTimeZone(String ID)

  Gets the `TimeZone` for the given ID.

  Parameters:
    `ID` - the ID for a `TimeZone`, either an abbreviation such as "GMT", or a full name such as "America/Los_Angeles".

    The only time zone ID that is required to be supported is "GMT".

  Returns:
    the specified TimeZone, or the GMT zone if the given ID cannot be understood.

### getDefault

    public static TimeZone getDefault()

  Gets the default `TimeZone` for this host. The source of the default `TimeZone` may vary with implementation.

  Returns:
    a default `TimeZone`.

### getAvailableIDs

    public static String[] getAvailableIDs()

  Gets all the available IDs supported.

  Returns:
    an array of IDs.

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