JEP 314: Additional Unicode Language-Tag Extensions

OwnerNaoto Sato
Created2017/03/24 23:19
Updated2017/11/10 17:18
TypeFeature
StatusCandidate
Componentcore-libs / java.util:i18n
ScopeSE
Discussioni18n dash dev at openjdk dot java dot net
Priority2
Reviewed byAlan Bateman
Endorsed byBrian Goetz
Issue8177568

Summary

Enhance java.util.Locale and related APIs to implement additional Unicode extensions of BCP 47 language tags.

Goals

Support for BCP 47 language tags was was initially added in Java SE 7, with support for the Unicode locale extension limited to calendars and numbers. This JEP will implement more of the extensions specified in the latest LDML specification, in the relevant JDK classes.

Non-Goals

Unicode language-tag extensions other than those described below will be ignored.

Description

As of Java SE 9, the supported BCP 47 U language-tag extensions are ca and nu. This JEP will add support for the following additional extensions:

In order to support these additional extensions, changes will be made to the following APIs:

Risks and Assumptions

The display names returned from Locale::getDisplayName depend on the localized data provided by each locale provider.