舍入到小数点后两位

Question

(Math.round(doubleValue*100))/100.0

有没有更好的方法将小数舍入到2位小数？

Answer 1

If you're interested in decimal places and therefore precise decimal values, you should typically be using java.math.BigDecimal to start with. You can then use Decimal.round or Decimal.setScale to round according to your exact needs.

Answer 2

DecimalFormat format=new DecimalFormat("#.##");
System.out.println(format.format(doubleValue));