RFR: 8315968: Consolidate java.util.Digits and StringLatin1::PACKED_DIGITS [v6]

[温绍锦]

On Mon, 11 Sep 2023 09:38:44 GMT, Claes Redestad <redestad at openjdk.org> wrote:

>> src/java.base/share/classes/jdk/internal/util/DecimalDigits.java line 201:
>> 
>>> 199:      * @return index of the most significant digit or minus sign, if present
>>> 200:      */
>>> 201:     public static int getChars(int i, int index, byte[] buf) {
>> 
>> It's unused now. Do we expect usages to be added in following PRs?
>
> These weren't in `java.util.DecimalDigits` but have been copied from `java.lang.StringLatin1` - part of an unfinished refactoring? There's no clear-cut answer where these best fits but it seems reasonable to keep them in `StringLatin1` and `StringUTF16` respectively.

> It's unused now. Do we expect usages to be added in following PRs?

I plan to provide the getChars method in this PR and use it in my other PR #15555. I also plan to submit another PR to optimize java.time toString, and I will also use this method. https://github.com/wenshao/jdk/commit/cc82e8c11aeb27c0f8581363f7133c85f6022ca1

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PR Review Comment: https://git.openjdk.org/jdk/pull/15651#discussion_r1321338873