RFR: 8260265: UTF-8 by Default

[Jesse Glick]

On Thu, 8 Jul 2021 21:23:00 GMT, Naoto Sato <naoto at openjdk.org> wrote:

> This is an implementation for the `JEP 400: UTF-8 by Default`. The gist of the changes is `Charset.defaultCharset()` returning `UTF-8` and `file.encoding` system property being added in the spec, but another notable modification is in `java.io.PrintStream` where it continues to use the `Console` encoding as the default charset instead of `UTF-8`. Other changes are mostly clarification of the term "default charset" and their links. Corresponding CSR has also been drafted.
> 
> JEP 400: https://bugs.openjdk.java.net/browse/JDK-8187041
> CSR: https://bugs.openjdk.java.net/browse/JDK-8260266

I would have expected `System.out` and `.err` to use the console encoding, but application-constructed `PrintStream`s to use UTF-8 by default.

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PR: https://git.openjdk.java.net/jdk/pull/4733