On Mon, 19 May 2025 23:50:59 GMT, Justin Lu <[email protected]> wrote:
>> src/java.base/share/classes/java/util/Locale.java line 2792:
>>
>>> 2790: * tag). {@code languageTag} may contain up to three extlang
>>> subtags.
>>> 2791: + For such occurrences, the first extlang subtag is used as
>>> the language,
>>> 2792: * and the primary language subtag and other extlang subtags
>>> are ignored.
>>
>> Should we throw an exeption here? I had an impression that the new
>> description actually contradicts to the previous sentense, which asserts
>> exception on ill-formed tag.
>
> An exception is thrown when more than three extlang subtags are provided
> (ill-formed). The new wording is when an allowed amount of extlang subtags
> are provided (not ill-formed). For example,
>
> `new Locale.Builder().setLanguageTag("zh-yue-gan-cmn-czh-CN").build()` //
> throws
> `new Locale.Builder().setLanguageTag("zh-yue-gan-cmn-CN").build()` // ==>
> yue_CN
>
> i.e. if one to three extlang subtags occur, discard extras. If more than 3
> occur, then it is ill-formed, and the method is already specified to throw on
> ill-formed tags. (Edit: Forgot to adjust the example)
OK. I would add these examples here too, which may be more helpful.
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PR Review Comment: https://git.openjdk.org/jdk/pull/25309#discussion_r2096650651
