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

[Maurizio Cimadamore]

On Thu, 2 Oct 2025 10:51:08 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.

src/java.base/share/classes/java/lang/LazyConstant.java line 276:

> 274:      * this method might block or throw.
> 275:      *
> 276:      * @implSpec The order of potential initialization triggering is specified as:

Do we really need to specify this?

src/java.base/share/classes/java/lang/LazyConstant.java line 312:

> 310:     String toString();
> 311: 
> 312:     // Factories

Suggestion:

    // Factory

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PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2426409576
PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2426412926