Java Date Compare by Day isSameDay(Date a, Date b)

Description

is Same Day

License

Open Source License

Declaration

public static boolean isSameDay(Date a, Date b) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2010 BSI Business Systems Integration AG.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:/*from  w w  w.ja  va  2 s .  c o m*/
 *     BSI Business Systems Integration AG - initial API and implementation
 ******************************************************************************/

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

public class Main {
    public static boolean isSameDay(Date a, Date b) {
        a = truncDate(a);
        b = truncDate(b);
        return equals(a, b);
    }

    /**
     * truncate the date to a day with time 00:00:00.000
     */
    public static Date truncDate(Date d) {
        if (d == null) {
            return null;
        }
        Calendar c = Calendar.getInstance();
        c.setTime(d);
        truncCalendar(c);
        return new Date(c.getTime().getTime());
    }

    public static boolean equals(Date a, Date b) {
        return a == b || (a != null && b != null && a.compareTo(b) == 0);
    }

    /**
     * truncate the calendar to a day with time 00:00:00.000
     */
    public static void truncCalendar(Calendar c) {
        c.set(Calendar.HOUR_OF_DAY, 0);
        c.set(Calendar.MINUTE, 0);
        c.set(Calendar.SECOND, 0);
        c.set(Calendar.MILLISECOND, 0);
    }
}

Related

1. isSameDay(Date a, Date b)
2. isSameDay(Date d1, Date d2)
3. isSameDay(Date d1, Date d2)
4. isSameDay(Date d1, Date d2)