RFR: 8302603: Use Set.of in java.nio.charset.Charset [v2]

[Alan Bateman]

On Mon, 20 Feb 2023 17:51:40 GMT, Glavo <duke at openjdk.org> wrote:

> I have updated the code.

Thanks for the update. I think it looks okay although "as" looks a bit strange here, I think I would use aliasSet or something better.

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PR: https://git.openjdk.org/jdk/pull/12570