<i18n dev> RFR: 8366178: Implement JEP 526: Lazy Constants (Second Preview) [v12]

[Maurizio Cimadamore]

On Fri, 17 Oct 2025 09:25:01 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:
> 
>   Update javadocs

src/java.base/share/classes/java/util/List.java line 1231:

> 1229:      * will be thrown.
> 1230:      * <p>
> 1231:      * The returned lazy list strongly references its computing

We should say that hashCode/equals trigger computation

src/java.base/share/classes/java/util/Map.java line 1784:

> 1782:      * will be thrown.
> 1783:      * <p>
> 1784:      * The returned lazy map strongly references its underlying

Again, we should say that equals/hashCode triggers computation

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PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2439200027
PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2439207782