[lworld] RFR: 8287241: Add IdentityException to report that a value object is not valid [v3]

[Roger Riggs]

On Wed, 8 Jun 2022 21:55:54 GMT, Rémi Forax <forax at openjdk.org> wrote:

>> Roger Riggs has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Tweaks to Objects.requireIdentity and IdentityException
>
> src/java.base/share/classes/java/lang/IdentityException.java line 69:
> 
>> 67:     public IdentityException(String message, Throwable cause) {
>> 68:         super(message, cause);
>> 69:     }
> 
> There is a missing variant, the one with a Throwable but no message that you use when you want to throw an IdentityException as a result of a previous exception (by example an IllegalMonitorStateException).

It not clear where to draw the line on convenience methods (message can be null), but ok, added.

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PR: https://git.openjdk.org/valhalla/pull/696