RFR: 8346944: Update Unicode Data Files to 17.0.0 [v2]

[Naoto Sato]

On Tue, 18 Nov 2025 18:35:07 GMT, Justin Lu <jlu at openjdk.org> wrote:

>> Naoto Sato has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 11 additional commits since the last revision:
>> 
>>  - Merge branch 'master' into JDK-8346944-Unicode-17
>>  - icudata path fix
>>  - Update versions
>>  - icu4j final
>>  - .md file changes
>>  - 17.0 final
>>  - icudata78b(binary)
>>  - CaseFolding.text -> 17, copyright symbol as is
>>  - icudt78b
>>  - 17-beta
>>  - ... and 1 more: https://git.openjdk.org/jdk/compare/e05cdfee...088cdaea
>
> src/java.base/share/classes/java/lang/Character.java line 746:
> 
>> 744:     public static final class UnicodeBlock extends Subset {
>> 745:         /**
>> 746:          * NUM_ENTITIES should match the total number of UnicodeBlocks.
> 
> I thought at first `NUM_ENTITIES` should be 790 due to 8 new `UnicodeBlock`s being added. However, it does go up to 804, becasue the total number includes the identifiers _and_ aliases (which is still a single `UnicodeBlock`). I think that distinction is worth correcting in the comment.

Good point. Filed: https://bugs.openjdk.org/browse/JDK-8372117

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PR Review Comment: https://git.openjdk.org/jdk/pull/28093#discussion_r2539417303