Java tutorial
//package com.java2s; /* * Copyright (C) 2012 www.amsoft.cn * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.math.BigDecimal; public class Main { public static double addWithRound(double value1, double value2) { return round(add(value1, value2)); } public static BigDecimal round(double number, int decimal) { return new BigDecimal(number).setScale(decimal, BigDecimal.ROUND_HALF_UP); } public static double round(double number) { return round(number, 2).doubleValue(); } public static double add(double value1, double value2) { BigDecimal b1 = new BigDecimal(value1); BigDecimal b2 = new BigDecimal(value2); return b1.add(b2).doubleValue(); } }