On Wed, 21 May 2025 21:19:36 GMT, Justin Lu <j...@openjdk.org> wrote:

> _sun.util.Locale.LanguageTag_ is essentially a BCP47 language tag data 
> carrier for Locale. The class, once created is not modified; the class should 
> be made immutable. Converting the class to a record accomplishes this and 
> also simplifies some of the existing code.

Comments addressed in 
https://github.com/openjdk/jdk/pull/25371/commits/2d778a85ebff14e5080a15556083c3e16986edf4.
 Chen, that's a good point, those getters are fragile. I opted to maintain the 
unmodifiable quality of the list fields, this code isn't perf sensitive and is 
more predictable this way. I wrapped the lists during parsing so we can drop 
overriding the getters altogether.

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PR Comment: https://git.openjdk.org/jdk/pull/25371#issuecomment-2901903043

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