RFR: 8377427: Reduce substring allocations in Color.web(String, double) [v16]

[Andy Goryachev]

On Mon, 23 Feb 2026 21:33:21 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

>> Color.web(string, double) parses a color string by creating substrings of the input. These string allocations can be removed.
>> 
>> CSS numbers are parsed by `CssNumberParser`, which parses CSS-compliant numbers using Lemire's algorithm.
>> 
>> There are no new tests for the `Color` class, since the existing tests already cover all relevant code paths.
>
> Michael Strauß has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review comment

Thanks for adding the tests!  (You did not have to add me as a contributor)

Nice touch with `LongConsumer` and `Math.nextUp`/`nextDown`.

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Marked as reviewed by angorya (Reviewer).

PR Review: https://git.openjdk.org/jfx/pull/2069#pullrequestreview-3843703317