On Mon, 18 Aug 2025 19:19:08 GMT, Naoto Sato <na...@openjdk.org> wrote:

>> `Instant.parse()` is expected to use the offset zone pattern `+HH:mm:ss` (as 
>> defined by `DateTimeFormatterBuilder.appendOffsetId()`), but it fails to 
>> parse hour-only offsets such as `+02`. This is because the actual 
>> implementation uses `+HH:MM:ss` as the pattern. While replacing the pattern 
>> in the implementation as with the specification would allow hour-only 
>> offsets, it would also introduce compatibility issues, i.e., printing would 
>> omit the minutes field when it is zero. So, it is preferable to update the 
>> specification to match the implementation. A CSR has also been drafted for 
>> this change.
>
> Naoto Sato has updated the pull request with a new target base due to a merge 
> or a rebase. The incremental webrev excludes the unrelated changes brought in 
> by the merge/rebase. The pull request contains nine additional commits since 
> the last revision:
> 
>  - DateTimeFormatterBuilder wording
>  - Added non-zero offset test cases
>  - Merge branch 'master' into JDK-8364752-Instant-ISO8601
>  - Update src/java.base/share/classes/java/time/format/DateTimeFormatter.java
>    
>    Right. Changing to your suggested wording
>    
>    Co-authored-by: Roger Riggs <roger.ri...@oracle.com>
>  - copyright year update
>  - test cases
>  - allow all ISO 8601 offsets
>  - allow hour-only offsets
>  - initial commit

Looks good, thanks for the explanation of the parsing format.

-------------

Marked as reviewed by rriggs (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26708#pullrequestreview-3133368081

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