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

[Shaojin Wen]

On Sat, 25 Jan 2025 13:04:52 GMT, Shaojin Wen <swen at openjdk.org> wrote:

> Since FloatToDecimal and DoubleToDecimal are used in Float.toString and Double.toString, some code in FloatingDecimal is not used. 
> 
> This PR refactors `FloatingDecimal` and `DigitList` to improve efficiency and reduce code duplication.
> 
> Key changes:
> * Convert internal digit storage from `char[]` to `byte[]` for reduced memory footprint.
> *   Remove unused code and methods that are no longer needed.

This pull request has now been integrated.

Changeset: dba0d545
Author:    Shaojin Wen <swen at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/dba0d545053fb73e57ea6fda829a5bf3d0135ac5
Stats:     222 lines in 2 files changed: 22 ins; 135 del; 65 mod

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

Reviewed-by: rgiulietti, liach

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PR: https://git.openjdk.org/jdk/pull/23311