RFR: 8268056: Update java.net and java.nio to use switch expressions [v5]

[Alan Bateman]

On Wed, 2 Jun 2021 15:23:01 GMT, Patrick Concannon <pconcannon at openjdk.org> wrote:

>> Hi,
>> 
>> Could someone please review my code for updating the code in the `java.net` and `java.nio` packages to make use of the switch expressions?
>> 
>> Kind regards,
>> Patrick
>
> Patrick Concannon has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'origin/master' into JDK-8268056
>  - 8268056: Added yield to switch expression in Files
>  - 8268056: reverted changes to FileTime
>  - Merge remote-tracking branch 'origin/master' into JDK-8268056
>  - 8268056: Reverted changes to URLDecoder; reformatted change to FileTime
>  - 8268056: Update java.net and java.nio to use switch expressions

src/java.base/share/classes/java/nio/file/Files.java line 2817:

> 2815:                     }
> 2816:                     case START_DIRECTORY -> {
> 2817:                         var r = visitor.preVisitDirectory(ev.file(), ev.attributes());

Can you all uses of "r" with "res" to make it little bit clear that it's a result, that will get it a bit more consistent with the exist code? Otherwise I think this version is okay.

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PR: https://git.openjdk.java.net/jdk/pull/4285