Java Date Equal areEqual(Date date1, Date date2)

Description

Compares if two dates are equal up to second resolution.

License

Open Source License

Parameter

Parameter	Description
date1	a parameter
date2	a parameter

Return

true if both dates are equal to the second or both dates are null.

Declaration

public static boolean areEqual(Date date1, Date date2) 

Method Source Code

//package com.java2s;
/*/*from w  ww.java2  s  .  co m*/
 * $Id: DateUtils.java,v 1.4 2005/10/10 18:02:45 rbair Exp $
 *
 * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

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

public class Main {
    /**
     * Compares if two dates are equal up to second resolution. Milliseconds are
     * not considered as these can be stripped if the date value is serialized
     * through a web service, etc. If one of the dates is null, false is
     * returned. If both dates are null, true is returned.
     *
     * @param date1
     * @param date2
     * @return true if both dates are equal to the second or both dates are
     * null.
     */
    public static boolean areEqual(Date date1, Date date2) {
        boolean result = false;
        if (date1 == null && date2 == null) {
            // Both dates are null
            result = true;
        } else if (date1 == null || date2 == null) {
            // One of the dates is not null
            result = false;
        } else {
            // Consider dates up to second resolution. 
            Calendar cal1 = Calendar.getInstance();
            Calendar cal2 = Calendar.getInstance();
            cal1.setTime(date1);
            cal2.setTime(date2);
            result = cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR)
                    && cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR)
                    && cal1.get(Calendar.HOUR_OF_DAY) == cal2.get(Calendar.HOUR_OF_DAY)
                    && cal1.get(Calendar.MINUTE) == cal2.get(Calendar.MINUTE)
                    && cal1.get(Calendar.SECOND) == cal2.get(Calendar.SECOND);
        }
        return result;

    }
}

Related

1. dateEquals(Date dtFirst, Date dtSecond)
2. datesEqualToSecond(Date date1, Date date2)
3. equal(Date date, Date other)
4. equalDateByDay(Date date1, Date date2)