private NumberPrinterParser numberPrinterParser(){
  if (numberPrinterParser == null) {
    numberPrinterParser=new NumberPrinterParser(field,1,19,SignStyle.NORMAL);
  }
  return numberPrinterParser;
}

private NumberPrinterParser numberPrinterParser ( ) { if ( numberPrinterParser == null ) { numberPrinterParser = new NumberPrinterParser ( field , 1 , 19 , SignStyle . NORMAL ) ; } return numberPrinterParser ; }
create and cache a number printer parser .
