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/MethodHandleProxies.java line 278:

> 276:     private static boolean isObjectMethod(Method m) {
> 277:         return switch (m.getName()) {
> 278:             case "toString" -> (m.getReturnType() == String.class

the extra parenthesis are not needed

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