<i18n dev> RFR: 8282819: Deprecate Locale class constructors [v6]

[Roger Riggs]

On Mon, 28 Mar 2022 22:16:43 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> Proposing to deprecate the constructors in the `java.util.Locale` class. There is already a factory method and a builder to return singletons, so there is no need to have constructors anymore unless one purposefully wants to create `ill-formed` Locale objects, which is discouraged. We cannot terminally deprecate those constructors for the compatibility to serialized objects created with older JDKs. Please see the draft CSR for more detail.
>
> Naoto Sato has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added an @apiNote describing the single array argument

src/java.base/share/classes/sun/util/locale/provider/JRELocaleConstants.java line 38:

> 36:  */
> 37: public class JRELocaleConstants {
> 38:     public static final Locale JA_JP_JP = Locale.forLanguageTag("ja-JP-x-lvariant-JP");

You might use the new factory here.

src/java.base/share/classes/sun/util/resources/LocaleData.java line 249:

> 247:         // TODO: avoid hard-coded Locales
> 248:         private static final Set<Locale> JAVA_BASE_LOCALES
> 249:             = Set.of(Locale.ROOT, Locale.ENGLISH, Locale.US, Locale.forLanguageTag("en-US-POSIX"));

Use new factory?

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PR: https://git.openjdk.java.net/jdk/pull/7947