RFR: 8365832: Optimize FloatingDecimal and DigitList with byte[] and cleanup

[Raffaello Giulietti]

On Wed, 20 Aug 2025 11:20:21 GMT, Shaojin Wen <swen at openjdk.org> wrote:

>>> @wenshao Curiously, there are now some people (you, @j3graham and myself) which are working on FloatingDecimal and related classes.
>> 
>> In PR #23310, @j3graham 's comment on January 25 mentioned FloatingDecimal, so I paid attention to this class
>
>> @wenshao In the initial description, there's a mention to reuse `DecimalDigits` to reduce code. Is that still relevant? I'm asking because I don't see any usage of `DecimalDigits`.
> 
> Thanks @rgiulietti  for the reminder, the original description is outdated and has been updated.

@wenshao There are several tests that fail, in particular in `test/jdk/java/text/Format`.
Please take a look.

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PR Comment: https://git.openjdk.org/jdk/pull/23311#issuecomment-3206225145