RFR: JDK-8274686 : java.util.UUID#hashCode() should use Long.hashCode()

[Сергей Цыпанов]

On Mon, 4 Oct 2021 21:13:02 GMT, PROgrm_JARvis <github.com+7693005+JarvisCraft at openjdk.org> wrote:

> This is trivial fix of [JDK-8274686](https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8274686) which replaces manually-computed `int`-based `long` hash-code.
> 
> Because `Long#hashCode(long)` uses other hashing function than the one currently used here:
> 
> https://github.com/openjdk/jdk/blob/75d6688df9845ecb8f370b4cd2d5a36f13d3cdc0/src/java.base/share/classes/java/lang/Long.java#L1440-L1442
> 
> the value of `hashCode()` will produce different result, however this does not seem to be a breaking change as `UUID#hashCode()` is not specified.
> 
> ---
> 
> Note: the comment to the bug states:
> 
>> Moved to JDK for further discussions of the proposed enhancement.
> 
> But as there seemed to be no corresponding discussion in core-libs-dev and the change looks trivial, I considered that it is appropriate to open a PR which (if needed) may be used for discussion (especially, considering the fact that its comments get mirrored to the ML).

Marked as reviewed by stsypanov at github.com (no known OpenJDK username).

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PR: https://git.openjdk.java.net/jdk/pull/5811