[lworld] RFR: 8287241: Add IdentityException to report that a value object is not valid [v2]

[Roger Riggs]

On Wed, 8 Jun 2022 21:20:55 GMT, Mandy Chung <mchung at openjdk.org> wrote:

>> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add Objects.requireIdentity(obj, Supplier<String> supplier);
>>   update copyright
>
> src/java.base/share/classes/java/util/Objects.java line 206:
> 
>> 204:         Objects.requireNonNull(obj);
>> 205:         var cl = obj.getClass();
>> 206:         if (cl.isValue())
> 
> Suggestion:
> 
>         if (obj.getClass().isValue())
> 
> 
> Same as the implementation of other variants of the `requireIdentity` method.

`cl` is used to throw the IdentityException in the following line.

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PR: https://git.openjdk.java.net/valhalla/pull/696