java保留兩位小數（不四捨五入）

import java.text.DecimalFormat;
import java.math.RoundingMode;
class Text{ 
    public static void main(String args[]){
    DecimalFormat formater = new DecimalFormat();
    formater.setMaximumFractionDigits(2);
    formater.setGroupingSize(0);
    formater.setRoundingMode(RoundingMode.FLOOR);
    System.out.println(formater.format(123456.7897456));
    }
}