Here you can find the source of addTimeByDate(int dateNum, Date date)
public static Date addTimeByDate(int dateNum, Date date)
//package com.java2s; /*/*w w w. j a v a 2 s . co m*/ * Copyright sunflower * * 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.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; public class Main { public static Date addTimeByDate(int dateNum, Date date) { Calendar calendar = new GregorianCalendar(); calendar.setTime(date); calendar.add(Calendar.DATE, dateNum); return date = calendar.getTime(); } }