public class Locales extends java.lang.Object
Locale
static java.util.Optional<java.util.Locale>
getParentLocale(java.util.Locale locale)
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public static java.util.Optional<java.util.Locale> getParentLocale(java.util.Locale locale)
java.lang.IllegalArgumentException
locale
null