RFR: 8268124: Update java.lang to use switch expressions

[Rémi Forax]

On Wed, 2 Jun 2021 15:25:16 GMT, Patrick Concannon <pconcannon at openjdk.org> wrote:

> Hi,
> 
> Could someone please review my code for updating the code in the `java.lang` packages to make use of the switch expressions?
> 
> Kind regards,
> Patrick

src/java.base/share/classes/java/lang/invoke/MemberName.java line 331:

> 329:                 assert(false) : this+" != "+MethodHandleNatives.refKindName((byte)originalRefKind);
> 330:                 yield true;
> 331:             }

this code always yield true, better to check if the assert are enabled, do the switch in that case and always return true

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PR: https://git.openjdk.java.net/jdk/pull/4312