RFR: 8299513: Cleanup java.io [v2]

[Brian Burkhalter]

On Thu, 5 Jan 2023 12:29:20 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> I think the casts are worth it to set `lock` only once during construction, but would be inclined to leave out the addition of `checkSize`.
>
> I have added a new proposal in the hope that the `requireNonNegative` method name and parameters should be trivial enough for users to directly understand without scrolling down. Let me know your thought on this.

That is definitely better but I would be inclined to place `requireNonNegative()` between the constructors and the instance methods.

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PR: https://git.openjdk.org/jdk/pull/11848