src/java.base/share/classes/sun/util/locale/provider/LocaleNameProviderImpl.java

@@ -58,11 +58,11 @@
         return LocaleProviderAdapter.toLocaleArray(langtags);
     }
 
     @Override
     public boolean isSupportedLocale(Locale locale) {
-        return LocaleProviderAdapter.isSupportedLocale(locale, type, langtags);
+        return LocaleProviderAdapter.forType(type).isSupportedProviderLocale(locale, langtags);
     }
 
     /**
      * Returns a localized name for the given ISO 639 language code and the
      * given locale that is appropriate for display to the user.