<i18n dev> RFR: 8366178: Implement JEP 526: Lazy Constants (Second Preview) [v20]

[Joe Darcy]

On Fri, 24 Oct 2025 09:01:10 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> Implement JEP 526: Lazy Constants (Second Preview)
>> 
>> The lazy list/map implementations are broken out from `ImmutableCollections` to a separate class.
>> 
>> The old benchmarks are not moved/renamed to allow comparison with previous releases.
>> 
>> `java.util.Optional` is updated so that its field is annotated with `@Stable`.  This is to allow `Optional` instances to be held in lazy constants and still provide constant folding.
>
> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Rework toString implementations

src/java.base/share/classes/java/lang/LazyConstant.java line 184:

> 182:  *          Use in static initializers may interact with class initialization order;
> 183:  *          cyclic initialization may result in initialization errors as described
> 184:  *          in {@jls 12.4} of <cite>The Java Language Specification</cite>.

Please use some text like "section" or "§" in from of the `@jls` tag.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2497396558