RFR: 8351565: Implement JEP 502: Stable Values (Preview) [v6]

[Viktor Klang]

On Mon, 17 Mar 2025 00:40:46 GMT, Chen Liang <liach at openjdk.org> wrote:

>> src/java.base/share/classes/java/util/ImmutableCollections.java line 798:
>> 
>>> 796:                 throw new IndexOutOfBoundsException(i);
>>> 797:             }
>>> 798:         }
>> 
>> I think `orElseSet` should be outside of the `try` block, otherwise an `ArrayIndexOutOfBoundsException` thrown by `mapper.apply` will be wrapped.
>
> Even better, we should just do a `Preconditions.checkIndex` explicitly.

I think the idea here is to avoid having to perform two consecutive range checks—one ahead of access and one as a part of the access. (wrapping of the exception aside).

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PR Review Comment: https://git.openjdk.org/jdk/pull/23972#discussion_r2014504355