<i18n dev> RFR: 8364780: Unicode extension clarifications for NumberFormat/DecimalFormatSymbols [v3]

[Naoto Sato]

On Thu, 7 Aug 2025 23:39:23 GMT, Justin Lu <jlu at openjdk.org> wrote:

>> This PR clarifies the Unicode extension wording in the DecimalFormatSymbols class description to make apparent that the "nu" extension is supported in addition to the "rg" extension. There already exists "nu" commentary in the specification of the  Locale accepting method APIs, the main purpose of this change is to clarify the behavior when both extensions are supplied.
>> 
>> Note that "may" wording is intentionally used, as symbols are only overridden if the JRE implementation provides support.
>
> Justin Lu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Updating NumberFormat with cu as well

LGTM. Reviewed the CSR too.

src/java.base/share/classes/java/text/DecimalFormatSymbols.java line 64:

> 62:  * <p>The "rg" (region override), "nu" (numbering system), and "cu" (currency)
> 63:  * {@code Locale} <a href="../util/Locale.html#def_locale_extension">Unicode
> 64:  * extensions</a> are supported which may override values within the symbols.

This can be replaced with `{@link Locale##def_locale_extension Unicode extensions}`. There are multiple locations for this, and it is obviously out of this PR's scope, it can be cleaned up with a separate issue.

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Marked as reviewed by naoto (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26683#pullrequestreview-3101534352
PR Review Comment: https://git.openjdk.org/jdk/pull/26683#discussion_r2263516692