Integrated: 8371732: [redo] Change java.time month/day field types to 'byte'

[Roger Riggs]

On Wed, 12 Nov 2025 18:29:52 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

> Redo change (8371732) that failed when the updated class objects were incompatible.
> The fields of classes are changed to allow a more compact form of storage.
> 
> To ensure compatibility of the class objects, the fields are explicitly declared in SerialPersistentFields with the original field types.
> The fields are marked `transient` to indicate the field declarations are not used for serialization.
> The affected classes are java.time.LocalDate, MonthDay, and YearMonth.
> Tests are added to verify the types and names of serialized fields of each class.
> 
> HijrahDate only changes the field types, the fields are transient and there is no change to the serialized from of the HijrahDate.class object.

This pull request has now been integrated.

Changeset: cc05530b
Author:    Roger Riggs <rriggs at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/cc05530b813564a40c233eaaa80b906795c6d752
Stats:     124 lines in 7 files changed: 100 ins; 0 del; 24 mod

8371732: [redo] Change java.time month/day field types to 'byte'

Reviewed-by: darcy, alanb

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PR: https://git.openjdk.org/jdk/pull/28274