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Enum Class Locale.FilteringMode

java.lang.Object

java.lang.Enum<Locale.FilteringMode>

java.util.Locale.FilteringMode

All Implemented Interfaces:: Serializable, Comparable<Locale.FilteringMode>, Constable

Enclosing class:: Locale

public static enum Locale.FilteringMode extends Enum<Locale.FilteringMode>

This enum provides constants to select a filtering mode for locale matching. Refer to RFC 4647 Matching of Language Tags for details.

As an example, think of two Language Priority Lists each of which includes only one language range and a set of following language tags:

    de (German)
    de-DE (German, Germany)
    de-Deva (German, in Devanagari script)
    de-Deva-DE (German, in Devanagari script, Germany)
    de-DE-1996 (German, Germany, orthography of 1996)
    de-Latn-DE (German, in Latin script, Germany)
    de-Latn-DE-1996 (German, in Latin script, Germany, orthography of 1996)

The filtering method will behave as follows:

Filtering method behavior
Filtering Mode	Language Priority List: `"de-DE"`	Language Priority List: `"de-*-DE"`
`AUTOSELECT_FILTERING`	Performs basic filtering and returns `"de-DE"` and `"de-DE-1996"`.	Performs extended filtering and returns `"de-DE"`, `"de-Deva-DE"`, `"de-DE-1996"`, `"de-Latn-DE"`, and `"de-Latn-DE-1996"`.
`EXTENDED_FILTERING`	Performs extended filtering and returns `"de-DE"`, `"de-Deva-DE"`, `"de-DE-1996"`, `"de-Latn-DE"`, and `"de-Latn-DE-1996"`.	Same as above.
`IGNORE_EXTENDED_RANGES`	Performs basic filtering and returns `"de-DE"` and `"de-DE-1996"`.	Performs basic filtering and returns `null` because nothing matches.
`MAP_EXTENDED_RANGES`	Same as above.	Performs basic filtering and returns `"de-DE"` and `"de-DE-1996"` because `"de-*-DE"` is mapped to `"de-DE"`.
`REJECT_EXTENDED_RANGES`	Same as above.	Throws `IllegalArgumentException` because `"de-*-DE"` is not a valid basic language range.

Since:

1.8

External Specifications

See Also:

Nested Class Summary

Nested classes/interfaces declared in class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constant	Description
`AUTOSELECT_FILTERING`	Specifies automatic filtering mode based on the given Language Priority List consisting of language ranges.
`EXTENDED_FILTERING`	Specifies extended filtering.
`IGNORE_EXTENDED_RANGES`	Specifies basic filtering: Note that any extended language ranges included in the given Language Priority List are ignored.
`MAP_EXTENDED_RANGES`	Specifies basic filtering: If any extended language ranges are included in the given Language Priority List, they are mapped to the basic language range.
`REJECT_EXTENDED_RANGES`	Specifies basic filtering: If any extended language ranges are included in the given Language Priority List, the list is rejected and the filtering method throws `IllegalArgumentException`.

Method Summary

Modifier and Type	Method	Description
`static Locale.FilteringMode`	`valueOf(String name)`	Returns the enum constant of this class with the specified name.
`static Locale.FilteringMode[]`	`values()`	Returns an array containing the constants of this enum class, in the order they are declared.

Methods declared in class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods declared in class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

AUTOSELECT_FILTERING

public static final Locale.FilteringMode AUTOSELECT_FILTERING

Specifies automatic filtering mode based on the given Language Priority List consisting of language ranges. If all of the ranges are basic, basic filtering is selected. Otherwise, extended filtering is selected.

EXTENDED_FILTERING

public static final Locale.FilteringMode EXTENDED_FILTERING

Specifies extended filtering.

IGNORE_EXTENDED_RANGES

public static final Locale.FilteringMode IGNORE_EXTENDED_RANGES

Specifies basic filtering: Note that any extended language ranges included in the given Language Priority List are ignored.

MAP_EXTENDED_RANGES

public static final Locale.FilteringMode MAP_EXTENDED_RANGES

Specifies basic filtering: If any extended language ranges are included in the given Language Priority List, they are mapped to the basic language range. Specifically, a language range starting with a subtag "*" is treated as a language range "*". For example, "*-US" is treated as "*". If "*" is not the first subtag, "*" and extra "-" are removed. For example, "ja-*-JP" is mapped to "ja-JP".

REJECT_EXTENDED_RANGES

public static final Locale.FilteringMode REJECT_EXTENDED_RANGES

Specifies basic filtering: If any extended language ranges are included in the given Language Priority List, the list is rejected and the filtering method throws IllegalArgumentException.

Method Details

values

public static Locale.FilteringMode[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:: an array containing the constants of this enum class, in the order they are declared

valueOf

public static Locale.FilteringMode valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:: name - the name of the enum constant to be returned.
Returns:: the enum constant with the specified name
Throws:: IllegalArgumentException - if this enum class has no constant with the specified name; NullPointerException - if the argument is null

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https://docs.oracle.com/en/java/javase/21/docs/api/java.base/java/util/Locale.FilteringMode.html