Movatterモバイル変換

java.lang.Object
- java.util.Locale

All Implemented Interfaces:
Serializable,Cloneable
```
public final classLocaleextendsObjectimplementsCloneable,Serializable
```
ALocale object represents a specific geographical, political, or cultural region. An operation that requires aLocale to perform its task is calledlocale-sensitive and uses theLocale to tailor information for the user. For example, displaying a number is a locale-sensitive operation— the number should be formatted according to the customs and conventions of the user's native country, region, or culture.
TheLocale class implements IETF BCP 47 which is composed ofRFC 4647 "Matching of Language Tags" andRFC 5646 "Tags for Identifying Languages" with support for the LDML (UTS#35, "Unicode Locale Data Markup Language") BCP 47-compatible extensions for locale data exchange.
ALocale object logically consists of the fields described below.
language
ISO 639 alpha-2 or alpha-3 language code, or registered language subtags up to 8 alpha letters (for future enhancements). When a language has both an alpha-2 code and an alpha-3 code, the alpha-2 code must be used. You can find a full list of valid language codes in the IANA Language Subtag Registry (search for "Type: language"). The language field is case insensitive, butLocale always canonicalizes to lower case.
Well-formed language values have the form[a-zA-Z]{2,8}. Note that this is not the the full BCP47 language production, since it excludes extlang. They are not needed since modern three-letter language codes replace them.
Example: "en" (English), "ja" (Japanese), "kok" (Konkani)
script
ISO 15924 alpha-4 script code. You can find a full list of valid script codes in the IANA Language Subtag Registry (search for "Type: script"). The script field is case insensitive, butLocale always canonicalizes to title case (the first letter is upper case and the rest of the letters are lower case).
Well-formed script values have the form[a-zA-Z]{4}
Example: "Latn" (Latin), "Cyrl" (Cyrillic)
country (region)
ISO 3166 alpha-2 country code or UN M.49 numeric-3 area code. You can find a full list of valid country and region codes in the IANA Language Subtag Registry (search for "Type: region"). The country (region) field is case insensitive, butLocale always canonicalizes to upper case.
Well-formed country/region values have the form[a-zA-Z]{2} | [0-9]{3}
Example: "US" (United States), "FR" (France), "029" (Caribbean)
variant
Any arbitrary value used to indicate a variation of aLocale. Where there are two or more variant values each indicating its own semantics, these values should be ordered by importance, with most important first, separated by underscore('_'). The variant field is case sensitive.
Note: IETF BCP 47 places syntactic restrictions on variant subtags. Also BCP 47 subtags are strictly used to indicate additional variations that define a language or its dialects that are not covered by any combinations of language, script and region subtags. You can find a full list of valid variant codes in the IANA Language Subtag Registry (search for "Type: variant").
However, the variant field inLocale has historically been used for any kind of variation, not just language variations. For example, some supported variants available in Java SE Runtime Environments indicate alternative cultural behaviors such as calendar type or number script. In BCP 47 this kind of information, which does not identify the language, is supported by extension subtags or private use subtags.
Well-formed variant values have the formSUBTAG (('_'|'-') SUBTAG)* whereSUBTAG = [0-9][0-9a-zA-Z]{3} | [0-9a-zA-Z]{5,8}. (Note: BCP 47 only uses hyphen ('-') as a delimiter, this is more lenient).
Example: "polyton" (Polytonic Greek), "POSIX"
extensions
A map from single character keys to string values, indicating extensions apart from language identification. The extensions inLocale implement the semantics and syntax of BCP 47 extension subtags and private use subtags. The extensions are case insensitive, butLocale canonicalizes all extension keys and values to lower case. Note that extensions cannot have empty values.
Well-formed keys are single characters from the set[0-9a-zA-Z]. Well-formed values have the formSUBTAG ('-' SUBTAG)* where for the key 'x'SUBTAG = [0-9a-zA-Z]{1,8} and for other keysSUBTAG = [0-9a-zA-Z]{2,8} (that is, 'x' allows single-character subtags).
Example: key="u"/value="ca-japanese" (Japanese Calendar), key="x"/value="java-1-7"
Note: Although BCP 47 requires field values to be registered in the IANA Language Subtag Registry, theLocale class does not provide any validation features. TheBuilder only checks if an individual field satisfies the syntactic requirement (is well-formed), but does not validate the value itself. SeeLocale.Builder for details.
Unicode locale/language extension
UTS#35, "Unicode Locale Data Markup Language" defines optional attributes and keywords to override or refine the default behavior associated with a locale. A keyword is represented by a pair of key and type. For example, "nu-thai" indicates that Thai local digits (value:"thai") should be used for formatting numbers (key:"nu").
The keywords are mapped to a BCP 47 extension value using the extension key 'u' (UNICODE_LOCALE_EXTENSION). The above example, "nu-thai", becomes the extension "u-nu-thai".code
Thus, when aLocale object contains Unicode locale attributes and keywords,getExtension(UNICODE_LOCALE_EXTENSION) will return a String representing this information, for example, "nu-thai". TheLocale class also providesgetUnicodeLocaleAttributes(),getUnicodeLocaleKeys(), andgetUnicodeLocaleType(java.lang.String) which allow you to access Unicode locale attributes and key/type pairs directly. When represented as a string, the Unicode Locale Extension lists attributes alphabetically, followed by key/type sequences with keys listed alphabetically (the order of subtags comprising a key's type is fixed when the type is defined)
A well-formed locale key has the form[0-9a-zA-Z]{2}. A well-formed locale type has the form"" | [0-9a-zA-Z]{3,8} ('-' [0-9a-zA-Z]{3,8})* (it can be empty, or a series of subtags 3-8 alphanums in length). A well-formed locale attribute has the form[0-9a-zA-Z]{3,8} (it is a single subtag with the same form as a locale type subtag).
The Unicode locale extension specifies optional behavior in locale-sensitive services. Although the LDML specification defines various keys and values, actual locale-sensitive service implementations in a Java Runtime Environment might not support any particular Unicode locale attributes or key/type pairs.
Creating a Locale
There are several different ways to create aLocale object.
Builder
UsingLocale.Builder you can construct aLocale object that conforms to BCP 47 syntax.
Constructors
TheLocale class provides three constructors:
```
Locale(String language)Locale(String language, String country)Locale(String language, String country, String variant)
```
These constructors allow you to create aLocale object with language, country and variant, but you cannot specify script or extensions.
Factory Methods
The methodforLanguageTag(java.lang.String) creates aLocale object for a well-formed BCP 47 language tag.
Locale Constants
TheLocale class provides a number of convenient constants that you can use to createLocale objects for commonly used locales. For example, the following creates aLocale object for the United States:
```
     Locale.US
```
Locale Matching
If an application or a system is internationalized and provides localized resources for multiple locales, it sometimes needs to find one or more locales (or language tags) which meet each user's specific preferences. Note that a term "language tag" is used interchangeably with "locale" in this locale matching documentation.
In order to do matching a user's preferred locales to a set of language tags,RFC 4647 Matching of Language Tags defines two mechanisms: filtering and lookup.Filtering is used to get all matching locales, whereaslookup is to choose the best matching locale. Matching is done case-insensitively. These matching mechanisms are described in the following sections.
A user's preference is called aLanguage Priority List and is expressed as a list of language ranges. There are syntactically two types of language ranges: basic and extended. SeeLocale.LanguageRange for details.
Filtering
The filtering operation returns all matching language tags. It is defined in RFC 4647 as follows: "In filtering, each language range represents the least specific language tag (that is, the language tag with fewest number of subtags) that is an acceptable match. All of the language tags in the matching set of tags will have an equal or greater number of subtags than the language range. Every non-wildcard subtag in the language range will appear in every one of the matching language tags."
There are two types of filtering: filtering for basic language ranges (called "basic filtering") and filtering for extended language ranges (called "extended filtering"). They may return different results by what kind of language ranges are included in the given Language Priority List.Locale.FilteringMode is a parameter to specify how filtering should be done.
Lookup
The lookup operation returns the best matching language tags. It is defined in RFC 4647 as follows: "By contrast with filtering, each language range represents the most specific tag that is an acceptable match. The first matching tag found, according to the user's priority, is considered the closest match and is the item returned."
For example, if a Language Priority List consists of two language ranges,"zh-Hant-TW" and"en-US", in prioritized order, lookup method progressively searches the language tags below in order to find the best matching language tag.
```
    1. zh-Hant-TW    2. zh-Hant    3. zh    4. en-US    5. en
```
If there is a language tag which matches completely to a language range above, the language tag is returned.
"*" is the special language range, and it is ignored in lookup.
If multiple language tags match as a result of the subtag'*' included in a language range, the first matching language tag returned by anIterator over aCollection of language tags is treated as the best matching one.
Use of Locale
Once you've created aLocale you can query it for information about itself. UsegetCountry to get the country (or region) code andgetLanguage to get the language code. You can usegetDisplayCountry to get the name of the country suitable for displaying to the user. Similarly, you can usegetDisplayLanguage to get the name of the language suitable for displaying to the user. Interestingly, thegetDisplayXXX methods are themselves locale-sensitive and have two versions: one that uses the defaultDISPLAY locale and one that uses the locale specified as an argument.
The Java Platform provides a number of classes that perform locale-sensitive operations. For example, theNumberFormat class formats numbers, currency, and percentages in a locale-sensitive manner. Classes such asNumberFormat have several convenience methods for creating a default object of that type. For example, theNumberFormat class provides these three convenience methods for creating a defaultNumberFormat object:
```
     NumberFormat.getInstance()     NumberFormat.getCurrencyInstance()     NumberFormat.getPercentInstance()
```
Each of these methods has two variants; one with an explicit locale and one without; the latter uses the defaultFORMAT locale:
```
     NumberFormat.getInstance(myLocale)     NumberFormat.getCurrencyInstance(myLocale)     NumberFormat.getPercentInstance(myLocale)
```
ALocale is the mechanism for identifying the kind of object (NumberFormat) that you would like to get. The locale isjust a mechanism for identifying objects,not a container for the objects themselves.
Compatibility
In order to maintain compatibility with existing usage, Locale's constructors retain their behavior prior to the Java Runtime Environment version 1.7. The same is largely true for thetoString method. Thus Locale objects can continue to be used as they were. In particular, clients who parse the output of toString into language, country, and variant fields can continue to do so (although this is strongly discouraged), although the variant field will have additional information in it if script or extensions are present.
In addition, BCP 47 imposes syntax restrictions that are not imposed by Locale's constructors. This means that conversions between some Locales and BCP 47 language tags cannot be made without losing information. ThustoLanguageTag cannot represent the state of locales whose language, country, or variant do not conform to BCP 47.
Because of these issues, it is recommended that clients migrate away from constructing non-conforming locales and use theforLanguageTag andLocale.Builder APIs instead. Clients desiring a string representation of the complete locale can then always rely ontoLanguageTag for this purpose.
Special cases
For compatibility reasons, two non-conforming locales are treated as special cases. These areja_JP_JP andth_TH_TH. These are ill-formed in BCP 47 since the variants are too short. To ease migration to BCP 47, these are treated specially during construction. These two cases (and only these) cause a constructor to generate an extension, all other values behave exactly as they did prior to Java 7.
Java has usedja_JP_JP to represent Japanese as used in Japan together with the Japanese Imperial calendar. This is now representable using a Unicode locale extension, by specifying the Unicode locale keyca (for "calendar") and typejapanese. When the Locale constructor is called with the arguments "ja", "JP", "JP", the extension "u-ca-japanese" is automatically added.
Java has usedth_TH_TH to represent Thai as used in Thailand together with Thai digits. This is also now representable using a Unicode locale extension, by specifying the Unicode locale keynu (for "number") and valuethai. When the Locale constructor is called with the arguments "th", "TH", "TH", the extension "u-nu-thai" is automatically added.
Serialization
During serialization, writeObject writes all fields to the output stream, including extensions.
During deserialization, readResolve adds extensions as described inSpecial Cases, only for the two cases th_TH_TH and ja_JP_JP.
Legacy language codes
Locale's constructor has always converted three language codes to their earlier, obsoleted forms:he maps toiw,yi maps toji, andid maps toin. This continues to be the case, in order to not break backwards compatibility.
The APIs added in 1.7 map between the old and new language codes, maintaining the old codes internal to Locale (so thatgetLanguage andtoString reflect the old code), but using the new codes in the BCP 47 language tag APIs (so thattoLanguageTag reflects the new one). This preserves the equivalence between Locales no matter which code or API is used to construct them. Java's default resource bundle lookup mechanism also implements this mapping, so that resources can be named using either convention, seeResourceBundle.Control.
Three-letter language/country(region) codes
The Locale constructors have always specified that the language and the country param be two characters in length, although in practice they have accepted any length. The specification has now been relaxed to allow language codes of two to eight characters and country (region) codes of two to three characters, and in particular, three-letter language codes and three-digit region codes as specified in the IANA Language Subtag Registry. For compatibility, the implementation still does not impose a length constraint.
Since:
1.1
See Also:
Locale.Builder,ResourceBundle,Format,NumberFormat,Collator,Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`Locale.Builder`	`Builder` is used to build instances of`Locale` from values configured by the setters.
`static class`	`Locale.Category`	Enum for locale categories.
`static class`	`Locale.FilteringMode`	This enum provides constants to select a filtering mode for locale matching.
`static class`	`Locale.LanguageRange`	This class expresses aLanguage Range defined inRFC 4647 Matching of Language Tags.

Field Summary

Fields
Modifier and Type	Field	Description
`staticLocale`	`CANADA`	Useful constant for country.
`staticLocale`	`CANADA_FRENCH`	Useful constant for country.
`staticLocale`	`CHINA`	Useful constant for country.
`staticLocale`	`CHINESE`	Useful constant for language.
`staticLocale`	`ENGLISH`	Useful constant for language.
`staticLocale`	`FRANCE`	Useful constant for country.
`staticLocale`	`FRENCH`	Useful constant for language.
`staticLocale`	`GERMAN`	Useful constant for language.
`staticLocale`	`GERMANY`	Useful constant for country.
`staticLocale`	`ITALIAN`	Useful constant for language.
`staticLocale`	`ITALY`	Useful constant for country.
`staticLocale`	`JAPAN`	Useful constant for country.
`staticLocale`	`JAPANESE`	Useful constant for language.
`staticLocale`	`KOREA`	Useful constant for country.
`staticLocale`	`KOREAN`	Useful constant for language.
`staticLocale`	`PRC`	Useful constant for country.
`static char`	`PRIVATE_USE_EXTENSION`	The key for the private use extension ('x').
`staticLocale`	`ROOT`	Useful constant for the root locale.
`staticLocale`	`SIMPLIFIED_CHINESE`	Useful constant for language.
`staticLocale`	`TAIWAN`	Useful constant for country.
`staticLocale`	`TRADITIONAL_CHINESE`	Useful constant for language.
`staticLocale`	`UK`	Useful constant for country.
`static char`	`UNICODE_LOCALE_EXTENSION`	The key for Unicode locale extension ('u').
`staticLocale`	`US`	Useful constant for country.

Constructor Summary

Constructors
Constructor	Description
`Locale(String language)`	Construct a locale from a language code.
`Locale(String language,String country)`	Construct a locale from language and country.
`Locale(String language,String country,String variant)`	Construct a locale from language, country and variant.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`clone()`	Overrides Cloneable.
`boolean`	`equals(Object obj)`	Returns true if this Locale is equal to another object.
`staticList<Locale>`	`filter(List<Locale.LanguageRange> priorityList,Collection<Locale> locales)`	Returns a list of matching`Locale` instances using the filtering mechanism defined in RFC 4647.
`staticList<Locale>`	`filter(List<Locale.LanguageRange> priorityList,Collection<Locale> locales,Locale.FilteringMode mode)`	Returns a list of matching`Locale` instances using the filtering mechanism defined in RFC 4647.
`staticList<String>`	`filterTags(List<Locale.LanguageRange> priorityList,Collection<String> tags)`	Returns a list of matching languages tags using the basic filtering mechanism defined in RFC 4647.
`staticList<String>`	`filterTags(List<Locale.LanguageRange> priorityList,Collection<String> tags,Locale.FilteringMode mode)`	Returns a list of matching languages tags using the basic filtering mechanism defined in RFC 4647.
`staticLocale`	`forLanguageTag(String languageTag)`	Returns a locale for the specified IETF BCP 47 language tag string.
`staticLocale[]`	`getAvailableLocales()`	Returns an array of all installed locales.
`String`	`getCountry()`	Returns the country/region code for this locale, which should either be the empty string, an uppercase ISO 3166 2-letter code, or a UN M.49 3-digit code.
`staticLocale`	`getDefault()`	Gets the current value of the default locale for this instance of the Java Virtual Machine.
`staticLocale`	`getDefault(Locale.Category category)`	Gets the current value of the default locale for the specified Category for this instance of the Java Virtual Machine.
`String`	`getDisplayCountry()`	Returns a name for the locale's country that is appropriate for display to the user.
`String`	`getDisplayCountry(Locale inLocale)`	Returns a name for the locale's country that is appropriate for display to the user.
`String`	`getDisplayLanguage()`	Returns a name for the locale's language that is appropriate for display to the user.
`String`	`getDisplayLanguage(Locale inLocale)`	Returns a name for the locale's language that is appropriate for display to the user.
`String`	`getDisplayName()`	Returns a name for the locale that is appropriate for display to the user.
`String`	`getDisplayName(Locale inLocale)`	Returns a name for the locale that is appropriate for display to the user.
`String`	`getDisplayScript()`	Returns a name for the the locale's script that is appropriate for display to the user.
`String`	`getDisplayScript(Locale inLocale)`	Returns a name for the locale's script that is appropriate for display to the user.
`String`	`getDisplayVariant()`	Returns a name for the locale's variant code that is appropriate for display to the user.
`String`	`getDisplayVariant(Locale inLocale)`	Returns a name for the locale's variant code that is appropriate for display to the user.
`String`	`getExtension(char key)`	Returns the extension (or private use) value associated with the specified key, or null if there is no extension associated with the key.
`Set<Character>`	`getExtensionKeys()`	Returns the set of extension keys associated with this locale, or the empty set if it has no extensions.
`String`	`getISO3Country()`	Returns a three-letter abbreviation for this locale's country.
`String`	`getISO3Language()`	Returns a three-letter abbreviation of this locale's language.
`staticString[]`	`getISOCountries()`	Returns a list of all 2-letter country codes defined in ISO 3166.
`staticString[]`	`getISOLanguages()`	Returns a list of all 2-letter language codes defined in ISO 639.
`String`	`getLanguage()`	Returns the language code of this Locale.
`String`	`getScript()`	Returns the script for this locale, which should either be the empty string or an ISO 15924 4-letter script code.
`Set<String>`	`getUnicodeLocaleAttributes()`	Returns the set of unicode locale attributes associated with this locale, or the empty set if it has no attributes.
`Set<String>`	`getUnicodeLocaleKeys()`	Returns the set of Unicode locale keys defined by this locale, or the empty set if this locale has none.
`String`	`getUnicodeLocaleType(String key)`	Returns the Unicode locale type associated with the specified Unicode locale key for this locale.
`String`	`getVariant()`	Returns the variant code for this locale.
`boolean`	`hasExtensions()`	Returns`true` if this`Locale` has any extensions.
`int`	`hashCode()`	Override hashCode.
`staticLocale`	`lookup(List<Locale.LanguageRange> priorityList,Collection<Locale> locales)`	Returns a`Locale` instance for the best-matching language tag using the lookup mechanism defined in RFC 4647.
`staticString`	`lookupTag(List<Locale.LanguageRange> priorityList,Collection<String> tags)`	Returns the best-matching language tag using the lookup mechanism defined in RFC 4647.
`static void`	`setDefault(Locale.Category category,Locale newLocale)`	Sets the default locale for the specified Category for this instance of the Java Virtual Machine.
`static void`	`setDefault(Locale newLocale)`	Sets the default locale for this instance of the Java Virtual Machine.
`Locale`	`stripExtensions()`	Returns a copy of this`Locale` with no extensions.
`String`	`toLanguageTag()`	Returns a well-formed IETF BCP 47 language tag representing this locale.
`String`	`toString()`	Returns a string representation of this`Locale` object, consisting of language, country, variant, script, and extensions as below: language + "_" + country + "_" + (variant + "_#" \| "#") + script + "-" + extensions Language is always lower case, country is always upper case, script is always title case, and extensions are always lower case.

Methods inherited from class java.lang.Object
finalize,getClass,notify,notifyAll,wait,wait,wait

Field Detail
- ENGLISH
```
public static final Locale ENGLISH
```
  Useful constant for language.
- FRENCH
```
public static final Locale FRENCH
```
  Useful constant for language.
- GERMAN
```
public static final Locale GERMAN
```
  Useful constant for language.
- ITALIAN
```
public static final Locale ITALIAN
```
  Useful constant for language.
- JAPANESE
```
public static final Locale JAPANESE
```
  Useful constant for language.
- KOREAN
```
public static final Locale KOREAN
```
  Useful constant for language.
- CHINESE
```
public static final Locale CHINESE
```
  Useful constant for language.
- SIMPLIFIED_CHINESE
```
public static final Locale SIMPLIFIED_CHINESE
```
  Useful constant for language.
- TRADITIONAL_CHINESE
```
public static final Locale TRADITIONAL_CHINESE
```
  Useful constant for language.
- FRANCE
```
public static final Locale FRANCE
```
  Useful constant for country.
- GERMANY
```
public static final Locale GERMANY
```
  Useful constant for country.
- ITALY
```
public static final Locale ITALY
```
  Useful constant for country.
- JAPAN
```
public static final Locale JAPAN
```
  Useful constant for country.
- KOREA
```
public static final Locale KOREA
```
  Useful constant for country.
- CHINA
```
public static final Locale CHINA
```
  Useful constant for country.
- PRC
```
public static final Locale PRC
```
  Useful constant for country.
- TAIWAN
```
public static final Locale TAIWAN
```
  Useful constant for country.
- UK
```
public static final Locale UK
```
  Useful constant for country.
- US
```
public static final Locale US
```
  Useful constant for country.
- CANADA
```
public static final Locale CANADA
```
  Useful constant for country.
- CANADA_FRENCH
```
public static final Locale CANADA_FRENCH
```
  Useful constant for country.
- ROOT
```
public static final Locale ROOT
```
  Useful constant for the root locale. The root locale is the locale whose language, country, and variant are empty ("") strings. This is regarded as the base locale of all locales, and is used as the language/country neutral locale for the locale sensitive operations.
  Since:
  1.6
- PRIVATE_USE_EXTENSION
```
public static final char PRIVATE_USE_EXTENSION
```
  The key for the private use extension ('x').
  Since:
  1.7
  See Also:
  getExtension(char),Locale.Builder.setExtension(char, String),Constant Field Values
- UNICODE_LOCALE_EXTENSION
```
public static final char UNICODE_LOCALE_EXTENSION
```
  The key for Unicode locale extension ('u').
  Since:
  1.7
  See Also:
  getExtension(char),Locale.Builder.setExtension(char, String),Constant Field Values

Constructor Detail
- Locale
```
public Locale(String language,String country,String variant)
```
  Construct a locale from language, country and variant. This constructor normalizes the language value to lowercase and the country value to uppercase.
  Note:
  - ISO 639 is not a stable standard; some of the language codes it defines (specifically "iw", "ji", and "in") have changed. This constructor accepts both the old codes ("iw", "ji", and "in") and the new codes ("he", "yi", and "id"), but all other API on Locale will return only the OLD codes.
  - For backward compatibility reasons, this constructor does not make any syntactic checks on the input.
  - The two cases ("ja", "JP", "JP") and ("th", "TH", "TH") are handled specially, seeSpecial Cases for more information.
  Parameters:
  language - An ISO 639 alpha-2 or alpha-3 language code, or a language subtag up to 8 characters in length. See theLocale class description about valid language values.
  country - An ISO 3166 alpha-2 country code or a UN M.49 numeric-3 area code. See theLocale class description about valid country values.
  variant - Any arbitrary value used to indicate a variation of aLocale. See theLocale class description for the details.
  Throws:
  NullPointerException - thrown if any argument is null.
- Locale
```
public Locale(String language,String country)
```
  Construct a locale from language and country. This constructor normalizes the language value to lowercase and the country value to uppercase.
  Note:
  - ISO 639 is not a stable standard; some of the language codes it defines (specifically "iw", "ji", and "in") have changed. This constructor accepts both the old codes ("iw", "ji", and "in") and the new codes ("he", "yi", and "id"), but all other API on Locale will return only the OLD codes.
  - For backward compatibility reasons, this constructor does not make any syntactic checks on the input.
  Parameters:
  language - An ISO 639 alpha-2 or alpha-3 language code, or a language subtag up to 8 characters in length. See theLocale class description about valid language values.
  country - An ISO 3166 alpha-2 country code or a UN M.49 numeric-3 area code. See theLocale class description about valid country values.
  Throws:
  NullPointerException - thrown if either argument is null.
- Locale
```
public Locale(String language)
```
  Construct a locale from a language code. This constructor normalizes the language value to lowercase.
  Note:
  - ISO 639 is not a stable standard; some of the language codes it defines (specifically "iw", "ji", and "in") have changed. This constructor accepts both the old codes ("iw", "ji", and "in") and the new codes ("he", "yi", and "id"), but all other API on Locale will return only the OLD codes.
  - For backward compatibility reasons, this constructor does not make any syntactic checks on the input.
  Parameters:
  language - An ISO 639 alpha-2 or alpha-3 language code, or a language subtag up to 8 characters in length. See theLocale class description about valid language values.
  Throws:
  NullPointerException - thrown if argument is null.
  Since:
  1.4

Method Detail

getDefault
```
public static Locale getDefault()
```
Gets the current value of the default locale for this instance of the Java Virtual Machine.
The Java Virtual Machine sets the default locale during startup based on the host environment. It is used by many locale-sensitive methods if no locale is explicitly specified. It can be changed using thesetDefault method.
Returns:
the default locale for this instance of the Java Virtual Machine

getDefault
```
public static Locale getDefault(Locale.Category category)
```
Gets the current value of the default locale for the specified Category for this instance of the Java Virtual Machine.
The Java Virtual Machine sets the default locale during startup based on the host environment. It is used by many locale-sensitive methods if no locale is explicitly specified. It can be changed using the setDefault(Locale.Category, Locale) method.
Parameters:
category - - the specified category to get the default locale
Returns:
the default locale for the specified Category for this instance of the Java Virtual Machine
Throws:
NullPointerException - - if category is null
Since:
1.7
See Also:
setDefault(Locale.Category, Locale)

setDefault
```
public static void setDefault(Locale newLocale)
```
Sets the default locale for this instance of the Java Virtual Machine. This does not affect the host locale.
If there is a security manager, itscheckPermission method is called with aPropertyPermission("user.language", "write") permission before the default locale is changed.
The Java Virtual Machine sets the default locale during startup based on the host environment. It is used by many locale-sensitive methods if no locale is explicitly specified.
Since changing the default locale may affect many different areas of functionality, this method should only be used if the caller is prepared to reinitialize locale-sensitive code running within the same Java Virtual Machine.
By setting the default locale with this method, all of the default locales for each Category are also set to the specified default locale.
Parameters:
newLocale - the new default locale
Throws:
SecurityException - if a security manager exists and itscheckPermission method doesn't allow the operation.
NullPointerException - ifnewLocale is null
See Also:
SecurityManager.checkPermission(java.security.Permission),PropertyPermission

setDefault
```
public static void setDefault(Locale.Category category,Locale newLocale)
```
Sets the default locale for the specified Category for this instance of the Java Virtual Machine. This does not affect the host locale.
If there is a security manager, its checkPermission method is called with a PropertyPermission("user.language", "write") permission before the default locale is changed.
The Java Virtual Machine sets the default locale during startup based on the host environment. It is used by many locale-sensitive methods if no locale is explicitly specified.
Since changing the default locale may affect many different areas of functionality, this method should only be used if the caller is prepared to reinitialize locale-sensitive code running within the same Java Virtual Machine.
Parameters:
category - - the specified category to set the default locale
newLocale - - the new default locale
Throws:
SecurityException - - if a security manager exists and its checkPermission method doesn't allow the operation.
NullPointerException - - if category and/or newLocale is null
Since:
1.7
See Also:
SecurityManager.checkPermission(java.security.Permission),PropertyPermission,getDefault(Locale.Category)

getAvailableLocales
```
public static Locale[] getAvailableLocales()
```
Returns an array of all installed locales. The returned array represents the union of locales supported by the Java runtime environment and by installedLocaleServiceProvider implementations. It must contain at least aLocale instance equal toLocale.US.
Returns:
An array of installed locales.

getISOCountries
```
public static String[] getISOCountries()
```
Returns a list of all 2-letter country codes defined in ISO 3166. Can be used to create Locales.
Note: TheLocale class also supports other codes for country (region), such as 3-letter numeric UN M.49 area codes. Therefore, the list returned by this method does not contain ALL valid codes that can be used to create Locales.
Returns:
An array of ISO 3166 two-letter country codes.

getISOLanguages
```
public static String[] getISOLanguages()
```
Returns a list of all 2-letter language codes defined in ISO 639. Can be used to create Locales.
Note:
- ISO 639 is not a stable standard— some languages' codes have changed. The list this function returns includes both the new and the old codes for the languages whose codes have changed.
- TheLocale class also supports language codes up to 8 characters in length. Therefore, the list returned by this method does not contain ALL valid codes that can be used to create Locales.
Returns:
Am array of ISO 639 two-letter language codes.

getLanguage
```
public String getLanguage()
```
Returns the language code of this Locale.
Note: ISO 639 is not a stable standard— some languages' codes have changed. Locale's constructor recognizes both the new and the old codes for the languages whose codes have changed, but this function always returns the old code. If you want to check for a specific language whose code has changed, don't do
```
 if (locale.getLanguage().equals("he")) // BAD!    ...
```
Instead, do
```
 if (locale.getLanguage().equals(new Locale("he").getLanguage()))    ...
```
Returns:
The language code, or the empty string if none is defined.
See Also:
getDisplayLanguage()

getScript
```
public String getScript()
```
Returns the script for this locale, which should either be the empty string or an ISO 15924 4-letter script code. The first letter is uppercase and the rest are lowercase, for example, 'Latn', 'Cyrl'.
Returns:
The script code, or the empty string if none is defined.
Since:
1.7
See Also:
getDisplayScript()

getCountry
```
public String getCountry()
```
Returns the country/region code for this locale, which should either be the empty string, an uppercase ISO 3166 2-letter code, or a UN M.49 3-digit code.
Returns:
The country/region code, or the empty string if none is defined.
See Also:
getDisplayCountry()

getVariant
```
public String getVariant()
```
Returns the variant code for this locale.
Returns:
The variant code, or the empty string if none is defined.
See Also:
getDisplayVariant()

hasExtensions
```
public boolean hasExtensions()
```
Returnstrue if thisLocale has any extensions.
Returns:
true if thisLocale has any extensions
Since:
1.8

stripExtensions
```
public Locale stripExtensions()
```
Returns a copy of thisLocale with no extensions. If thisLocale has no extensions, thisLocale is returned.
Returns:
a copy of thisLocale with no extensions, orthis ifthis has no extensions
Since:
1.8

getExtension
```
public String getExtension(char key)
```
Returns the extension (or private use) value associated with the specified key, or null if there is no extension associated with the key. To be well-formed, the key must be one of[0-9A-Za-z]. Keys are case-insensitive, so for example 'z' and 'Z' represent the same extension.
Parameters:
key - the extension key
Returns:
The extension, or null if this locale defines no extension for the specified key.
Throws:
IllegalArgumentException - if key is not well-formed
Since:
1.7
See Also:
PRIVATE_USE_EXTENSION,UNICODE_LOCALE_EXTENSION

getExtensionKeys
```
public Set<Character> getExtensionKeys()
```
Returns the set of extension keys associated with this locale, or the empty set if it has no extensions. The returned set is unmodifiable. The keys will all be lower-case.
Returns:
The set of extension keys, or the empty set if this locale has no extensions.
Since:
1.7

getUnicodeLocaleAttributes
```
public Set<String> getUnicodeLocaleAttributes()
```
Returns the set of unicode locale attributes associated with this locale, or the empty set if it has no attributes. The returned set is unmodifiable.
Returns:
The set of attributes.
Since:
1.7

getUnicodeLocaleType
```
public String getUnicodeLocaleType(String key)
```
Returns the Unicode locale type associated with the specified Unicode locale key for this locale. Returns the empty string for keys that are defined with no type. Returns null if the key is not defined. Keys are case-insensitive. The key must be two alphanumeric characters ([0-9a-zA-Z]), or an IllegalArgumentException is thrown.
Parameters:
key - the Unicode locale key
Returns:
The Unicode locale type associated with the key, or null if the locale does not define the key.
Throws:
IllegalArgumentException - if the key is not well-formed
NullPointerException - ifkey is null
Since:
1.7

getUnicodeLocaleKeys
```
public Set<String> getUnicodeLocaleKeys()
```
Returns the set of Unicode locale keys defined by this locale, or the empty set if this locale has none. The returned set is immutable. Keys are all lower case.
Returns:
The set of Unicode locale keys, or the empty set if this locale has no Unicode locale keywords.
Since:
1.7

toString
```
public final String toString()
```
Returns a string representation of thisLocale object, consisting of language, country, variant, script, and extensions as below:
language + "_" + country + "_" + (variant + "_#" | "#") + script + "-" + extensions
Language is always lower case, country is always upper case, script is always title case, and extensions are always lower case. Extensions and private use subtags will be in canonical order as explained intoLanguageTag().
When the locale has neither script nor extensions, the result is the same as in Java 6 and prior.
If both the language and country fields are missing, this function will return the empty string, even if the variant, script, or extensions field is present (you can't have a locale with just a variant, the variant must accompany a well-formed language or country code).
If script or extensions are present and variant is missing, no underscore is added before the "#".
This behavior is designed to support debugging and to be compatible with previous uses oftoString that expected language, country, and variant fields only. To represent a Locale as a String for interchange purposes, usetoLanguageTag().
Examples:
- en
- de_DE
- _GB
- en_US_WIN
- de__POSIX
- zh_CN_#Hans
- zh_TW_#Hant-x-java
- th_TH_TH_#u-nu-thai
Overrides:
toString in class Object
Returns:
A string representation of the Locale, for debugging.
See Also:
getDisplayName(),toLanguageTag()

toLanguageTag
```
public String toLanguageTag()
```
Returns a well-formed IETF BCP 47 language tag representing this locale.
If thisLocale has a language, country, or variant that does not satisfy the IETF BCP 47 language tag syntax requirements, this method handles these fields as described below:
Language: If language is empty, or notwell-formed (for example "a" or "e2"), it will be emitted as "und" (Undetermined).
Country: If country is notwell-formed (for example "12" or "USA"), it will be omitted.
Variant: If variantiswell-formed, each sub-segment (delimited by '-' or '_') is emitted as a subtag. Otherwise:
- if all sub-segments match[0-9a-zA-Z]{1,8} (for example "WIN" or "Oracle_JDK_Standard_Edition"), the first ill-formed sub-segment and all following will be appended to the private use subtag. The first appended subtag will be "lvariant", followed by the sub-segments in order, separated by hyphen. For example, "x-lvariant-WIN", "Oracle-x-lvariant-JDK-Standard-Edition".
- if any sub-segment does not match[0-9a-zA-Z]{1,8}, the variant will be truncated and the problematic sub-segment and all following sub-segments will be omitted. If the remainder is non-empty, it will be emitted as a private use subtag as above (even if the remainder turns out to be well-formed). For example, "Solaris_isjustthecoolestthing" is emitted as "x-lvariant-Solaris", not as "solaris".
Special Conversions: Java supports some old locale representations, including deprecated ISO language codes, for compatibility. This method performs the following conversions:
- Deprecated ISO language codes "iw", "ji", and "in" are converted to "he", "yi", and "id", respectively.
- A locale with language "no", country "NO", and variant "NY", representing Norwegian Nynorsk (Norway), is converted to a language tag "nn-NO".
Note: Although the language tag created by this method is well-formed (satisfies the syntax requirements defined by the IETF BCP 47 specification), it is not necessarily a valid BCP 47 language tag. For example,
```
   new Locale("xx", "YY").toLanguageTag();
```
will return "xx-YY", but the language subtag "xx" and the region subtag "YY" are invalid because they are not registered in the IANA Language Subtag Registry.
Returns:
a BCP47 language tag representing the locale
Since:
1.7
See Also:
forLanguageTag(String)

forLanguageTag

public static Locale forLanguageTag(String languageTag)

Returns a locale for the specified IETF BCP 47 language tag string.

If the specified language tag contains any ill-formed subtags, the first such subtag and all following subtags are ignored. Compare toLocale.Builder.setLanguageTag(java.lang.String) which throws an exception in this case.

The followingconversions are performed:

The language code "und" is mapped to language "".
The language codes "he", "yi", and "id" are mapped to "iw", "ji", and "in" respectively. (This is the same canonicalization that's done in Locale's constructors.)

The portion of a private use subtag prefixed by "lvariant", if any, is removed and appended to the variant field in the result locale (without case normalization). If it is then empty, the private use subtag is discarded:

     Locale loc;     loc = Locale.forLanguageTag("en-US-x-lvariant-POSIX");     loc.getVariant(); // returns "POSIX"     loc.getExtension('x'); // returns null     loc = Locale.forLanguageTag("de-POSIX-x-URP-lvariant-Abc-Def");     loc.getVariant(); // returns "POSIX_Abc_Def"     loc.getExtension('x'); // returns "urp"

When the languageTag argument contains an extlang subtag, the first such subtag is used as the language, and the primary language subtag and other extlang subtags are ignored:
```
     Locale.forLanguageTag("ar-aao").getLanguage(); // returns "aao"     Locale.forLanguageTag("en-abc-def-us").toString(); // returns "abc_US"
```
Case is normalized except for variant tags, which are left unchanged. Language is normalized to lower case, script to title case, country to upper case, and extensions to lower case.

If, after processing, the locale would exactly match either ja_JP_JP or th_TH_TH with no extensions, the appropriate extensions are added as though the constructor had been called:

    Locale.forLanguageTag("ja-JP-x-lvariant-JP").toLanguageTag();    // returns "ja-JP-u-ca-japanese-x-lvariant-JP"    Locale.forLanguageTag("th-TH-x-lvariant-TH").toLanguageTag();    // returns "th-TH-u-nu-thai-x-lvariant-TH"

This implements the 'Language-Tag' production of BCP47, and so supports grandfathered (regular and irregular) as well as private use language tags. Stand alone private use tags are represented as empty language and extension 'x-whatever', and grandfathered tags are converted to their canonical replacements where they exist.

Grandfathered tags with canonical replacements are as follows:

grandfathered tag		modern replacement
art-lojban		jbo
i-ami		ami
i-bnn		bnn
i-hak		hak
i-klingon		tlh
i-lux		lb
i-navajo		nv
i-pwn		pwn
i-tao		tao
i-tay		tay
i-tsu		tsu
no-bok		nb
no-nyn		nn
sgn-BE-FR		sfb
sgn-BE-NL		vgt
sgn-CH-DE		sgg
zh-guoyu		cmn
zh-hakka		hak
zh-min-nan		nan
zh-xiang		hsn

Grandfathered tags with no modern replacement will be converted as follows:

grandfathered tag		converts to
cel-gaulish		xtg-x-cel-gaulish
en-GB-oed		en-GB-x-oed
i-default		en-x-i-default
i-enochian		und-x-i-enochian
i-mingo		see-x-i-mingo
zh-min		nan-x-zh-min

For a list of all grandfathered tags, see the IANA Language Subtag Registry (search for "Type: grandfathered").

Note: there is no guarantee thattoLanguageTag andforLanguageTag will round-trip.

Parameters:: languageTag - the language tag
Returns:: The locale that best represents the language tag.
Throws:: NullPointerException - iflanguageTag isnull
Since:: 1.7
See Also:: toLanguageTag(),Locale.Builder.setLanguageTag(String)

getISO3Language
```
public String getISO3Language()                       throwsMissingResourceException
```
Returns a three-letter abbreviation of this locale's language. If the language matches an ISO 639-1 two-letter code, the corresponding ISO 639-2/T three-letter lowercase code is returned. The ISO 639-2 language codes can be found on-line, see "Codes for the Representation of Names of Languages Part 2: Alpha-3 Code". If the locale specifies a three-letter language, the language is returned as is. If the locale does not specify a language the empty string is returned.
Returns:
A three-letter abbreviation of this locale's language.
Throws:
MissingResourceException - Throws MissingResourceException if three-letter language abbreviation is not available for this locale.

getISO3Country
```
public String getISO3Country()                      throwsMissingResourceException
```
Returns a three-letter abbreviation for this locale's country. If the country matches an ISO 3166-1 alpha-2 code, the corresponding ISO 3166-1 alpha-3 uppercase code is returned. If the locale doesn't specify a country, this will be the empty string.
The ISO 3166-1 codes can be found on-line.
Returns:
A three-letter abbreviation of this locale's country.
Throws:
MissingResourceException - Throws MissingResourceException if the three-letter country abbreviation is not available for this locale.

getDisplayLanguage
```
public final String getDisplayLanguage()
```
Returns a name for the locale's language that is appropriate for display to the user. If possible, the name returned will be localized for the defaultDISPLAY locale. For example, if the locale is fr_FR and the defaultDISPLAY locale is en_US, getDisplayLanguage() will return "French"; if the locale is en_US and the defaultDISPLAY locale is fr_FR, getDisplayLanguage() will return "anglais". If the name returned cannot be localized for the defaultDISPLAY locale, (say, we don't have a Japanese name for Croatian), this function falls back on the English name, and uses the ISO code as a last-resort value. If the locale doesn't specify a language, this function returns the empty string.
Returns:
The name of the display language.

getDisplayLanguage
```
public String getDisplayLanguage(Locale inLocale)
```
Returns a name for the locale's language that is appropriate for display to the user. If possible, the name returned will be localized according to inLocale. For example, if the locale is fr_FR and inLocale is en_US, getDisplayLanguage() will return "French"; if the locale is en_US and inLocale is fr_FR, getDisplayLanguage() will return "anglais". If the name returned cannot be localized according to inLocale, (say, we don't have a Japanese name for Croatian), this function falls back on the English name, and finally on the ISO code as a last-resort value. If the locale doesn't specify a language, this function returns the empty string.
Parameters:
inLocale - The locale for which to retrieve the display language.
Returns:
The name of the display language appropriate to the given locale.
Throws:
NullPointerException - ifinLocale isnull

getDisplayScript
```
public String getDisplayScript()
```
Returns a name for the the locale's script that is appropriate for display to the user. If possible, the name will be localized for the defaultDISPLAY locale. Returns the empty string if this locale doesn't specify a script code.
Returns:
the display name of the script code for the current defaultDISPLAY locale
Since:
1.7

getDisplayScript
```
public String getDisplayScript(Locale inLocale)
```
Returns a name for the locale's script that is appropriate for display to the user. If possible, the name will be localized for the given locale. Returns the empty string if this locale doesn't specify a script code.
Parameters:
inLocale - The locale for which to retrieve the display script.
Returns:
the display name of the script code for the current defaultDISPLAY locale
Throws:
NullPointerException - ifinLocale isnull
Since:
1.7

getDisplayCountry
```
public final String getDisplayCountry()
```
Returns a name for the locale's country that is appropriate for display to the user. If possible, the name returned will be localized for the defaultDISPLAY locale. For example, if the locale is fr_FR and the defaultDISPLAY locale is en_US, getDisplayCountry() will return "France"; if the locale is en_US and the defaultDISPLAY locale is fr_FR, getDisplayCountry() will return "Etats-Unis". If the name returned cannot be localized for the defaultDISPLAY locale, (say, we don't have a Japanese name for Croatia), this function falls back on the English name, and uses the ISO code as a last-resort value. If the locale doesn't specify a country, this function returns the empty string.
Returns:
The name of the country appropriate to the locale.

getDisplayCountry
```
public String getDisplayCountry(Locale inLocale)
```
Returns a name for the locale's country that is appropriate for display to the user. If possible, the name returned will be localized according to inLocale. For example, if the locale is fr_FR and inLocale is en_US, getDisplayCountry() will return "France"; if the locale is en_US and inLocale is fr_FR, getDisplayCountry() will return "Etats-Unis". If the name returned cannot be localized according to inLocale. (say, we don't have a Japanese name for Croatia), this function falls back on the English name, and finally on the ISO code as a last-resort value. If the locale doesn't specify a country, this function returns the empty string.
Parameters:
inLocale - The locale for which to retrieve the display country.
Returns:
The name of the country appropriate to the given locale.
Throws:
NullPointerException - ifinLocale isnull

getDisplayVariant
```
public final String getDisplayVariant()
```
Returns a name for the locale's variant code that is appropriate for display to the user. If possible, the name will be localized for the defaultDISPLAY locale. If the locale doesn't specify a variant code, this function returns the empty string.
Returns:
The name of the display variant code appropriate to the locale.

getDisplayVariant
```
public String getDisplayVariant(Locale inLocale)
```
Returns a name for the locale's variant code that is appropriate for display to the user. If possible, the name will be localized for inLocale. If the locale doesn't specify a variant code, this function returns the empty string.
Parameters:
inLocale - The locale for which to retrieve the display variant code.
Returns:
The name of the display variant code appropriate to the given locale.
Throws:
NullPointerException - ifinLocale isnull

getDisplayName
```
public final String getDisplayName()
```
Returns a name for the locale that is appropriate for display to the user. This will be the values returned by getDisplayLanguage(), getDisplayScript(), getDisplayCountry(), and getDisplayVariant() assembled into a single string. The the non-empty values are used in order, with the second and subsequent names in parentheses. For example:
language (script, country, variant)
language (country)
language (variant)
script (country)
country
depending on which fields are specified in the locale. If the language, script, country, and variant fields are all empty, this function returns the empty string.
Returns:
The name of the locale appropriate to display.

getDisplayName
```
public String getDisplayName(Locale inLocale)
```
Returns a name for the locale that is appropriate for display to the user. This will be the values returned by getDisplayLanguage(), getDisplayScript(),getDisplayCountry(), and getDisplayVariant() assembled into a single string. The non-empty values are used in order, with the second and subsequent names in parentheses. For example:
language (script, country, variant)
language (country)
language (variant)
script (country)
country
depending on which fields are specified in the locale. If the language, script, country, and variant fields are all empty, this function returns the empty string.
Parameters:
inLocale - The locale for which to retrieve the display name.
Returns:
The name of the locale appropriate to display.
Throws:
NullPointerException - ifinLocale isnull

clone
```
public Object clone()
```
Overrides Cloneable.
Overrides:
clone in class Object
Returns:
a clone of this instance.
See Also:
Cloneable

hashCode
```
public int hashCode()
```
Override hashCode. Since Locales are often used in hashtables, caches the value for speed.
Overrides:
hashCode in class Object
Returns:
a hash code value for this object.
See Also:
Object.equals(java.lang.Object),System.identityHashCode(java.lang.Object)

equals
```
public boolean equals(Object obj)
```
Returns true if this Locale is equal to another object. A Locale is deemed equal to another Locale with identical language, script, country, variant and extensions, and unequal to all other objects.
Overrides:
equals in class Object
Parameters:
obj - the reference object with which to compare.
Returns:
true if this Locale is equal to the specified object.
See Also:
Object.hashCode(),HashMap

filter
```
public static List<Locale> filter(List<Locale.LanguageRange> priorityList,Collection<Locale> locales,Locale.FilteringMode mode)
```
Returns a list of matchingLocale instances using the filtering mechanism defined in RFC 4647.
Parameters:
priorityList - user's Language Priority List in which each language tag is sorted in descending order based on priority or weight
locales -Locale instances used for matching
mode - filtering mode
Returns:
a list ofLocale instances for matching language tags sorted in descending order based on priority or weight, or an empty list if nothing matches. The list is modifiable.
Throws:
NullPointerException - ifpriorityList orlocales isnull
IllegalArgumentException - if one or more extended language ranges are included in the given list whenLocale.FilteringMode.REJECT_EXTENDED_RANGES is specified
Since:
1.8

filter
```
public static List<Locale> filter(List<Locale.LanguageRange> priorityList,Collection<Locale> locales)
```
Returns a list of matchingLocale instances using the filtering mechanism defined in RFC 4647. This is equivalent tofilter(List, Collection, FilteringMode) whenmode isLocale.FilteringMode.AUTOSELECT_FILTERING.
Parameters:
priorityList - user's Language Priority List in which each language tag is sorted in descending order based on priority or weight
locales -Locale instances used for matching
Returns:
a list ofLocale instances for matching language tags sorted in descending order based on priority or weight, or an empty list if nothing matches. The list is modifiable.
Throws:
NullPointerException - ifpriorityList orlocales isnull
Since:
1.8

filterTags
```
public static List<String> filterTags(List<Locale.LanguageRange> priorityList,Collection<String> tags,Locale.FilteringMode mode)
```
Returns a list of matching languages tags using the basic filtering mechanism defined in RFC 4647.
Parameters:
priorityList - user's Language Priority List in which each language tag is sorted in descending order based on priority or weight
tags - language tags
mode - filtering mode
Returns:
a list of matching language tags sorted in descending order based on priority or weight, or an empty list if nothing matches. The list is modifiable.
Throws:
NullPointerException - ifpriorityList ortags isnull
IllegalArgumentException - if one or more extended language ranges are included in the given list whenLocale.FilteringMode.REJECT_EXTENDED_RANGES is specified
Since:
1.8

filterTags
```
public static List<String> filterTags(List<Locale.LanguageRange> priorityList,Collection<String> tags)
```
Returns a list of matching languages tags using the basic filtering mechanism defined in RFC 4647. This is equivalent tofilterTags(List, Collection, FilteringMode) whenmode isLocale.FilteringMode.AUTOSELECT_FILTERING.
Parameters:
priorityList - user's Language Priority List in which each language tag is sorted in descending order based on priority or weight
tags - language tags
Returns:
a list of matching language tags sorted in descending order based on priority or weight, or an empty list if nothing matches. The list is modifiable.
Throws:
NullPointerException - ifpriorityList ortags isnull
Since:
1.8

lookup
```
public static Locale lookup(List<Locale.LanguageRange> priorityList,Collection<Locale> locales)
```
Returns aLocale instance for the best-matching language tag using the lookup mechanism defined in RFC 4647.
Parameters:
priorityList - user's Language Priority List in which each language tag is sorted in descending order based on priority or weight
locales -Locale instances used for matching
Returns:
the best matchingLocale instance chosen based on priority or weight, ornull if nothing matches.
Throws:
NullPointerException - ifpriorityList ortags isnull
Since:
1.8

lookupTag
```
public static String lookupTag(List<Locale.LanguageRange> priorityList,Collection<String> tags)
```
Returns the best-matching language tag using the lookup mechanism defined in RFC 4647.
Parameters:
priorityList - user's Language Priority List in which each language tag is sorted in descending order based on priority or weight
tags - language tangs used for matching
Returns:
the best matching language tag chosen based on priority or weight, ornull if nothing matches.
Throws:
NullPointerException - ifpriorityList ortags isnull
Since:
1.8

Movatterモバイル変換

Class Locale

Unicode locale/language extension

Creating a Locale

Builder

Constructors

Factory Methods

Locale Constants

Locale Matching

Filtering

Lookup

Use of Locale

Compatibility

Special cases

Serialization

Legacy language codes

Three-letter language/country(region) codes

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ENGLISH

FRENCH

GERMAN

ITALIAN

JAPANESE

KOREAN

CHINESE

SIMPLIFIED_CHINESE

TRADITIONAL_CHINESE

FRANCE

GERMANY

ITALY

JAPAN

KOREA

CHINA

PRC

TAIWAN

UK

US

CANADA

CANADA_FRENCH

ROOT

PRIVATE_USE_EXTENSION

UNICODE_LOCALE_EXTENSION

Constructor Detail

Locale

Locale

Locale

Method Detail

getDefault

getDefault

setDefault

setDefault

getAvailableLocales

getISOCountries

getISOLanguages

getLanguage

getScript

getCountry

getVariant

hasExtensions

stripExtensions

getExtension

getExtensionKeys

getUnicodeLocaleAttributes

getUnicodeLocaleType

getUnicodeLocaleKeys

toString

toLanguageTag

forLanguageTag

getISO3Language

getISO3Country

getDisplayLanguage

getDisplayLanguage

getDisplayScript

getDisplayScript

getDisplayCountry