Android Day Compare isSameDay(Date date1, Date date2)

Description

Checks if two date objects are on the same day ignoring time.

28 Mar 2002 13:45 and 28 Mar 2002 06:01 would return true.

License

Apache License

Parameter

Parameter	Description
date1	the first date, not altered, not null
date2	the second date, not altered, not null

Exception

Parameter	Description
IllegalArgumentException	if either date is <code>null</code>

Return

true if they represent the same day

Declaration

public static boolean isSameDay(Date date1, Date date2) 

Method Source Code

//package com.java2s;
/*/*from   www  . j  av  a 2 s .c om*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 * 
 * 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 {
    /**
     * <p>Checks if two date objects are on the same day ignoring time.</p>
     *
     * <p>28 Mar 2002 13:45 and 28 Mar 2002 06:01 would return true.
     * 28 Mar 2002 13:45 and 12 Mar 2002 13:45 would return false.
     * </p>
     * 
     * @param date1  the first date, not altered, not null
     * @param date2  the second date, not altered, not null
     * @return true if they represent the same day
     * @throws IllegalArgumentException if either date is <code>null</code>
     * @since 2.1
     */
    public static boolean isSameDay(Date date1, Date date2) {
        if (date1 == null || date2 == null) {
            throw new IllegalArgumentException("The date must not be null");
        }
        Calendar cal1 = Calendar.getInstance();
        cal1.setTime(date1);
        Calendar cal2 = Calendar.getInstance();
        cal2.setTime(date2);
        return isSameDay(cal1, cal2);
    }

    /**
     * <p>Checks if two calendar objects are on the same day ignoring time.</p>
     *
     * <p>28 Mar 2002 13:45 and 28 Mar 2002 06:01 would return true.
     * 28 Mar 2002 13:45 and 12 Mar 2002 13:45 would return false.
     * </p>
     * 
     * @param cal1  the first calendar, not altered, not null
     * @param cal2  the second calendar, not altered, not null
     * @return true if they represent the same day
     * @throws IllegalArgumentException if either calendar is <code>null</code>
     * @since 2.1
     */
    public static boolean isSameDay(Calendar cal1, Calendar cal2) {
        if (cal1 == null || cal2 == null) {
            throw new IllegalArgumentException("The date must not be null");
        }
        return (cal1.get(Calendar.ERA) == cal2.get(Calendar.ERA)
                && cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR) && cal1
                    .get(Calendar.DAY_OF_YEAR) == cal2
                .get(Calendar.DAY_OF_YEAR));
    }
}

Related

1. isSameDay(Calendar cal1, Calendar cal2)
2. daysSince(long date)
3. isDateDayEqual(long lTime1, long lTime2)
4. getDaysAgo(String fromDay, int toOlderDay, int toOlderDayMonth)