RFR: 8366224: Introduce DecimalDigits.appendPair for efficient two-digit formatting and refactor DateTimeHelper [v18]

[Shaojin Wen]

On Thu, 13 Nov 2025 04:16:28 GMT, Chen Liang <liach at openjdk.org> wrote:

>> Shaojin Wen has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - fix codestyle
>>  - digitQuad MergeStore & from @liach
>
> test/jdk/jdk/internal/util/DecimalDigitsTest.java line 36:
> 
>> 34:  * @summary Test DecimalDigits.appendPair method with LATIN1 and UTF16 encoding
>> 35:  * @modules java.base/jdk.internal.util
>> 36:  * @run testng test.jdk.internal.util.DecimalDigitsTest
> 
> We recommend using junit for new tests.

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;


Using JUnit 5 will cause an error:

/Users/wenshao/Work/git/jdk/test/jdk/jdk/internal/util/DecimalDigitsTest.java:27: error: package org.junit.jupiter.api does not exist
import static org.junit.jupiter.api.Assertions.assertEquals;

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PR Review Comment: https://git.openjdk.org/jdk/pull/26911#discussion_r2521691404