code: public static final KeyUpHandler getFormatStrKeyUpHandler() { // NOPMD it's thread save!
      if (HandlerFactory.formatStrKeyUpHandler == null) {
        synchronized (DecimalKeyPressHandler.class) {
          if (HandlerFactory.formatStrKeyUpHandler == null) {
            HandlerFactory.formatStrKeyUpHandler = new FormatKeyUpHandler<>();
          }
        }
      }
      return HandlerFactory.formatStrKeyUpHandler;
    }
docs: get a format key up handler.
  
  @return FormatKeyUpHandler&lt;String&gt;