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MenoData / Time4J

Advanced date, time and interval library for Java with sun/moon-astronomy and calendars like Chinese, Coptic, Ethiopian, French Republican, Hebrew, Hijri, Historic Christian, Indian National, Japanese, Julian, Korean, Minguo, Persian, Thai, Vietnamese
GNU Lesser General Public License v2.1
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Respect Unicode extension `hc` #933

Closed s5bug closed 3 years ago

s5bug commented 3 years ago

As of right now I'm unable to override the clock system in a locale with hc like en-US-u-hc-h23 for 0-23 clock hours. If possible, I'd like to store this information in the language tab instead of as a separate variable. Is this possible?

MenoData commented 3 years ago

This feature is not yet offered by Time4J. I have found some documentation in CLDR.

If I understand you right then you would like to set the hc-preference in the locale and override any default time patterns in the format engine. This practically indicates the need to process/change format patterns created by default. For example, if the locale is "en-US-u-hc-h23" then the time-style-pattern needs to be changed from "hh:mm a" to "HH:mm" and vice versa. All style based formatters are concerned here.

Actually, the class ChronoFormatter supports following unicode extensions:

ca, nu, fw, rg (see the tutorial, too)

MenoData commented 3 years ago

Some kind of time style pattern processing is realized in the sister project Time4A where the default preference for 12/24-hour mode is evaluated. Maybe this code could be a start for the implementation in Time4J.