RFR: 8356420: Provide examples on wrapping System.in [v6]

[Naoto Sato]

On Tue, 13 May 2025 16:21:36 GMT, Naoto Sato <naoto at openjdk.org> wrote:

>> How did you search for those sources? I searched for literal `System.in` and my comments are the only ones I could find in the JDK.
>
> There are several locations in the jdk source (I simply grep'ed for `new InputStreamReader(System.in)`). And yes, they will need to be replaced with the recommended usage. I will address them with a different JBS issue.

Issue filed: https://bugs.openjdk.org/browse/JDK-8356893

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PR Review Comment: https://git.openjdk.org/jdk/pull/25155#discussion_r2087403916