https://docs.oracle.com/javase/jp/15/docs/api/java.base/java/util/Locale.IsoCountryCode.html
Locale.IsoCountryCode (Java SE 15 & JDK 15)
declaration: module: java.base, package: java.util, class: Locale, enum: IsoCountryCode
java selocalejdk
https://developer.android.com/reference/java/util/Locale.IsoCountryCode?authuser=1
Locale.IsoCountryCode | API reference | Android Developers
api referencelocaleandroiddevelopers