/*  * 测试四舍五入  */ package com.icer.test; /**  *  * @author Hanbin  */ public class MyRound {     public static void main(String[] args) {         double num = 3.23562;         double number = 0;         number = new MyRound().myRound(num,2);         System.out.println("after:" + number);     }     private double myRound(double number,int index){         double result = 0;         double temp = Math.pow(10, index);         result = Math.round(number*temp)/temp;         return result;     } }