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

[Naoto Sato]

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

Hi Patrick, some minor comments.

src/java.base/share/classes/java/lang/CharacterData.java line 80:

> 78:                 case 2 -> CharacterData02.instance;
> 79:                 case 3 -> CharacterData03.instance;
> 80:                 case 14 -> CharacterData0E.instance; // Private Use

Plane 14 is not `private use`

src/java.base/share/classes/java/lang/invoke/DirectMethodHandle.java line 90:

> 88:             // findVirtual etc.
> 89:             return switch (refKind) {
> 90:                 case REF_invokeSpecial: {

Is ':' preferred here (and other cases too) instead of "->"?

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