Java Date Compare by Month monthsBetween(Date firstDate, Date secondDate)

Description

Calculates number of month between two dates.

License

Open Source License

Parameter

Parameter	Description
firstDate	First date parameter.
secondDate	Second date parameter.

Return

number of month.

Declaration

public static int monthsBetween(Date firstDate, Date secondDate) 

Method Source Code

//package com.java2s;
/*//  w w w . j  av a 2  s.  c  om
* (C) Copyright 2009-2013 Manaty SARL (http://manaty.net/) and contributors.
*
* Licensed under the GNU Public Licence, 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.gnu.org/licenses/gpl-2.0.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.
*/

import java.util.Calendar;
import java.util.Date;

public class Main {
    /**
     * Calculates number of month between two dates.
     * 
     * @param firstDate
     *            First date parameter.
     * @param secondDate
     *            Second date parameter.
     * @return number of month.
     */
    public static int monthsBetween(Date firstDate, Date secondDate) {
        Date before = null;
        Date after = null;
        if (firstDate.after(secondDate)) {
            after = firstDate;
            before = secondDate;
        } else {
            after = secondDate;
            before = firstDate;
        }

        Calendar cal = Calendar.getInstance();
        cal.setTime(before);
        int beforeMonth = cal.get(Calendar.MONTH);
        int beforeYear = cal.get(Calendar.YEAR);
        cal.setTime(after);
        int afterMonth = cal.get(Calendar.MONTH);
        int afterYear = cal.get(Calendar.YEAR);

        return ((afterYear * 12) + afterMonth) - ((beforeYear * 12) + beforeMonth);
    }
}

Related

1. isSameMonth(Date date1, Date date2)
2. isSameMonth(Date date1, Date date2)
3. isSameMonth(final Date d1, final Date d2)
4. isSameMonth(final Date date1, final Date date2)
5. monthsBetween(final Date von, final Date bis)
6. sameMonth(Date date1, Date date2)
7. sameMonth(Date date1, Date date2)
8. sameMonth(Date dateOne, Date dateTwo)