String numeric type converted to thousands

        String str = DecimalFormat.getNumberInstance().format(1245600000);

        String currecy = NumberFormat.getCurrencyInstance().format(1245600000);

        System.out.println(" convert to Currency Format ："+currecy);

        System.out.println(" Convert to format with thousands ："+str);  

      Output results ：         

      convert to Currency Format ：￥1,245,600,000.00
      Convert to format with thousands ：1,245,600,000