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Lesson - 1 : i18n - Locale class in Internationalization in Java Programming

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Published on Mar 4, 2017

public final class Locale
extends Object
implements Cloneable, Serializable
A Locale object represents a specific geographical, political, or cultural region. An operation that requires a Locale to perform its task is called locale-sensitive and uses the Locale 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.
The Locale class implements identifiers interchangeable with BCP 47 (IETF BCP 47, "Tags for Identifying Languages"), with support for the LDML (UTS#35, "Unicode Locale Data Markup Language") BCP 47-compatible extensions for locale data exchange.

A Locale 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, but Locale 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)

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