RFR: 8262108: SimpleDateFormat formatting broken for sq_MK Locale [v2]

[Naoto Sato]

On Tue, 13 Apr 2021 15:03:28 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

>> Can I please get a review for this proposed fix for https://bugs.openjdk.java.net/browse/JDK-8262108?
>> 
>> As noted in a comment in that issue, the bug relates to the return value of `Calendar.getDisplayNames` for the `Calendar.AM_PM` field. The implementation has started returning invalid values for the `AM_PM` field after the "day period" support was added recently in the JDK as part of https://bugs.openjdk.java.net/browse/JDK-8262108.
>> 
>> The commit here adds a check in the internal implementation of the display name handling logic, to special case the `AM_PM` field and properly convert the display name array indexes (which is an internal detail) to valid values that represent the `AM_PM` calendar field.
>> 
>> The commit also has a new jtreg test case `CalendarDisplayNamesTest` reproduces this issue and verifies the fix.
>> 
>> After this fix was introduced, I ran the test in `test/jdk/java/util/Calendar/` and that showed up a failure in an existing test case `NarrowNamesTest`. Looking at that test case, IMO, the current testing in that `NarrowNamesTest` is incorrect and is probably what hid this issue in the first place? To fix this, I have added an additional commit which updates this test case to properly test the `AM_PM` field values.
>
> Jaikiran Pai has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - copyright year and @bug id reference in existing test
>  - copyright year on source

Have you run regression tests in java.time? If I am not mistaken, your changes simply seem to nullify the day period support.

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PR: https://git.openjdk.java.net/jdk/pull/3463