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

[Francesco Andreuzzi]

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 166:

> 164:  *
> 165:  * <h2 id="performance">Performance</h2>
> 166:  * As a lazy constant can never change after it has been initialized. Therefore,

Suggestion:

 * A lazy constant can never change after it has been initialized. Therefore,

src/java.base/share/classes/java/util/LazyCollections.java line 80:

> 78:         }
> 79: 
> 80:         @Override public boolean  isEmpty() { return size == 0;}

Suggestion:

        @Override public boolean  isEmpty() { return size == 0; }

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PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2399059426
PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2399074220