Java Day Between calculateDays(Date beginDate, Date endDate)

Description

Calculates difference between two days, in days

License

Apache License

Parameter

Parameter	Description
beginDate	a parameter
endDate	a parameter

Return

difference in days

Declaration

public static long calculateDays(Date beginDate, Date endDate) 

Method Source Code

//package com.java2s;
/*/*w ww  .ja v  a2 s  .c  o m*/
 *    Copyright 2003, 2004, 2005, 2006 Research Triangle Institute
 *
 *    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
 */

import java.util.Calendar;

import java.util.Date;
import java.util.GregorianCalendar;

import java.util.TimeZone;

public class Main {
    /**
     * Calculates difference between two days, in days
     * @param beginDate
     * @param endDate
     * @return difference in days
     */
    public static long calculateDays(Date beginDate, Date endDate) {
        GregorianCalendar beginCalendar = new GregorianCalendar();
        beginCalendar.setTime(beginDate);
        GregorianCalendar endCalendar = new GregorianCalendar();
        endCalendar.setTime(endDate);
        java.util.Date d1 = beginCalendar.getTime();
        java.util.Date d2 = endCalendar.getTime();
        long l1 = d1.getTime();
        long l2 = d2.getTime();
        // there are 86400 seconds in a day
        long diffSeconds = (l2 - l1) / 1000;
        long diffDays = diffSeconds / 86400;
        return diffDays;
    }

    public static String getTime() {
        Calendar cal = Calendar.getInstance(TimeZone.getDefault());
        String DATE_FORMAT = "HH:mm:ss";
        java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat(DATE_FORMAT);
        sdf.setTimeZone(TimeZone.getDefault());
        String now = sdf.format(cal.getTime());
        return now;
    }

    public static String getTime(Date date) {
        // Calendar cal = Calendar.getInstance(TimeZone.getDefault());
        String DATE_FORMAT = "HH:mm:ss";
        java.text.SimpleDateFormat sdf = new java.text.SimpleDateFormat(DATE_FORMAT);
        // sdf.setTimeZone(TimeZone.getDefault());
        String formattedTime = sdf.format(date);
        return formattedTime;
    }
}

Related

1. calculateDayDifference(final Date a, final Date b)
2. calculateDays(Date dateEarly, Date dateLater)
3. calculateDifference(Date d1, Date d2)
4. calculateDifferMonths(Date date1, Date date2, boolean isTruncate)
5. calculateNumberOfDays(String dateStr)