forLanguage_factory2.java

import java.util.Locale;
import java.text.NumberFormat;
class LocaleConstantExample {
 public static void main(String[] args) {
   Locale usLocale = Locale.forLanguageTag("en-US");
   Locale deLocale = Locale.forLanguageTag("de-Germany");
   long number = 123456789L;
   NumberFormat denf = NumberFormat.getInstance(deLocale);
   NumberFormat usnf = NumberFormat.getInstance(usLocale);
   System.out.println( denf.format(number) ); 
   System.out.println( usnf.format(number) );
  
 }
}