Here you can find the source of between(Date smdate, Date bdate)
public static int between(Date smdate, Date bdate)
//package com.java2s; //License from project: Apache License import java.util.Calendar; import java.util.Date; public class Main { public static int between(Date smdate, Date bdate) { Calendar cal = Calendar.getInstance(); cal.setTime(smdate);/*from w ww. j a v a 2 s. c om*/ long time1 = cal.getTimeInMillis(); cal.setTime(bdate); long time2 = cal.getTimeInMillis(); long between_days = (time2 - time1) / (1000 * 3600 * 24); return Integer.parseInt(String.valueOf(between_days)); } }