Here you can find the source of daysBetween(Date date1, Date date2)
private static long daysBetween(Date date1, Date date2)
//package com.java2s; /*//from ww w . ja va 2 s. c om * Copyright (C) 2011 JFrog Ltd. * * 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.*; public class Main { private static long daysBetween(Date date1, Date date2) { long diff; if (date2.after(date1)) { diff = date2.getTime() - date1.getTime(); } else { diff = date1.getTime() - date2.getTime(); } return diff / (24 * 60 * 60 * 1000); } }