Re: [icu-support] Utility to convert locale codes from one format to another

[<yos...@us...>]

> Dear All,
> 
> I am writing a utility to convert locale codes from one format to 
another.
> 
> I wanted to find out if ICU4j provides similar utilities.
> 
> To begin with my requirement is to convert :-
> 1> ISO639 2 letter code to UTS35 and viceversa.

I do not understand this. ISO639 2 letter code is used by UTS35, so why do 
you need to convert them?

> 2> Java locales to UTS35 and vice versa.

I assume you want traditional UTS35 format - like 
"ja_JP@calendar=japanese"

Java Locale to UTS35: ULocale.forLocale(locale).toString()
UTS35 to Java Locale: new ULocale(uts35).toLocale()

The modern UTS35 locale identifier uses BCP47 format, such as 
"ja-JP-u-ca-japanese". If you want the modern format, then use 
ULocale#toLanguageTag() instead of ULocale#toString().

> 3> RFC4646 to UTS35 and viceversa.

BCP47 to UTS35: ULocale.forLanguageTag(bcp47).toString()
UTS35 to BCP47: new ULocale(uts35).toLanguageTag()

> 
> Also if there are any other utilities to do the same in CLDR, Apache
> or any other place, please point me to the same.

I do not know if there are any.

-Yoshito