Hi, Naoto-san,
Oh, I think I had misunderstood the behavior of COMPAT Provider.
COMPAT Provider provide values, each of them are the same form as Supplemental
Era, right?
I think the value I wrote before are wrong at Short form of COMPAT
(DateTimeFormatter).
Is there no inconsistency, isn't it
Yes, I believe that's correct.
Only inconsistency (outside of supplementary era support) is that "G"
pattern for SimpleDateFormat outputs differently between COMPAT provider
and CLDR provider, e.g., COMPAT returns "H" and CLDR returns "Heisei",
which comes from CLDR data using "Heisei" for "ab