Java tutorial
//package com.java2s; import java.util.Date; public class Main { /** * calculate difference form two dates Note: both dates are in same format. * * @param mDate1 date 1 * @param mDate2 date 2 * @return date difference in long */ public static long calculateDays(Date mDate1, Date mDate2) { return Math.abs((mDate1.getTime() - mDate2.getTime()) / (24 * 60 * 60 * 1000) + 1); } }