code: public String getText(String key, Object... args) throws MissingResourceException {
          ResourceBundle bundle = initRB();
          String message = bundle.getString(key);
          return MessageFormat.format(message, args);
      }
docs: Get and format message string from resource
  
  @param key selects message from resource
  @param args arguments to be replaced in the message.
  @throws MissingResourceException when the key does not
  exist in the properties file.