RFR: 8366178: Implement JEP 526: Lazy Constants (Second Preview) [v28]

[Per Minborg]

On Mon, 17 Nov 2025 12:16:52 GMT, David Beaumont <duke at openjdk.org> wrote:

>> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix typo
>
> src/java.base/share/classes/java/nio/charset/Charset.java line 1:
> 
>> 1: /*
> 
> Side note: I'm slightly surprised to see the introduction and the usage happening in the same PR. Is this really being submitting in one go?

I've replaced `StableValue` with `LazyConstant`. So there is no new introduction, but just an adaptation.

> src/java.base/share/classes/java/nio/charset/Charset.java line 619:
> 
>> 617: 
>> 618:     private static final LazyConstant<Charset> defaultCharset = LazyConstant.of(
>> 619:             new Supplier<>() { public Charset get() { return defaultCharset0(); }});
> 
> Can these not be done with lambdas?

They can, but I wanted to keep it verbatim to the existing code.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2534085547
PR Review Comment: https://git.openjdk.org/jdk/pull/27605#discussion_r2534087249