RFR: JDK-8280168: Add Objects.toIdentityString [v7]

[Joe Darcy]

On Mon, 24 Jan 2022 21:51:13 GMT, Rémi Forax <forax at openjdk.org> wrote:

> toIdentityString is a better name than toDefaultString.
> 
> It's fine for me but given that "identity" has a slightly different meaning in the context of Valhalla that in System.identityHashCode(), it may be good to ask Brian about that name.

Modulo the method name, I have discussed with Brian adding a method with toIdentityString's semantics to Objects and he agreed the method was worth having.

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PR: https://git.openjdk.java.net/jdk/pull/7139