Here you can find the source of addDays(final Date date, final int days)
public static Date addDays(final Date date, final int days)
//package com.java2s; /**//w w w. j av a 2 s. c o m * * Licensed under the GNU General Public License (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.gnu.org/licenses/gpl.txt * * 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. * * * @author Vadim Kisen * * copyright 2010 by uTest */ import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; public class Main { public static final int DAY_OF_MONTH = Calendar.DAY_OF_MONTH; public static final int HOUR = Calendar.HOUR; public static final int MINUTE = Calendar.MINUTE; public static final int SECOND = Calendar.SECOND; /** * @return Adds the given number of days to the given date and return a * copy. */ public static Date addDays(final Date date, final int days) { final GregorianCalendar gc = new GregorianCalendar(); gc.setTime(date); gc.add(Calendar.DAY_OF_MONTH, days); return gc.getTime(); } /** * Given a Date as parameter, it sets it to the specified time and returns a * copy. * * @param date * Original date * @param hours * Hours to set to the date * @param minutes * Minutes to set to the date * @param seconds * Seconds to set to the date * * @return A new Date with the given time. */ public static Date setTime(final Date date, final int hours, final int minutes, final int seconds) { final Calendar aux = Calendar.getInstance(); aux.setTime(date); aux.set(Calendar.MILLISECOND, 0); aux.set(Calendar.HOUR, hours); aux.set(Calendar.MINUTE, minutes); aux.set(Calendar.SECOND, seconds); return aux.getTime(); } }