Java Week Day getLastWeekDay(int weekDay)

Description

get Last Week Day

License

Apache License

Declaration

public static Date getLastWeekDay(int weekDay) 

Method Source Code

//package com.java2s;
/**/*from  ww  w .j a  v a2  s .  c  o m*/
 * DateTimeUtil.java
 * <p>
 * Copyright 2010 @company@, Inc.
 *
 * @company@ 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:
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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;
import java.util.GregorianCalendar;

public class Main {
    public static final long SECOND = 1000;
    public static final long MINUTE = 60 * SECOND;

    public static Date getLastWeekDay(int weekDay) {
        return getLastWeekDay(weekDay, new Date());
    }

    public static Date getLastWeekDay(Date end) {
        if (end == null)
            throw new IllegalArgumentException("The parameter [end date] should not be null!");
        GregorianCalendar cal = getCalender(end);
        cal.add(Calendar.DAY_OF_MONTH, -7);

        return cal.getTime();
    }

    public static Date getLastWeekDay(int weekDay, Date end) {
        if (end == null)
            throw new IllegalArgumentException("The parameter [end date] should not be null!");
        GregorianCalendar cal = getCalender(end);
        cal.set(Calendar.DAY_OF_WEEK, weekDay);

        if (!cal.getTime().before(end)) {
            cal.add(Calendar.DAY_OF_MONTH, -7);
        }
        return cal.getTime();
    }

    private static GregorianCalendar getCalender(Date date) {
        GregorianCalendar cal = new GregorianCalendar();
        cal.setTime(date);
        cal.set(Calendar.MILLISECOND, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.HOUR_OF_DAY, 0);

        return cal;
    }
}

Related

1. getLastDayOfCurrWeek()
2. getLastDayOfWeek(int year, int month)
3. getLastSundayBeforeThisWeek()
4. getLastWeekday()
5. getLastWeekDay(int weekDay)
6. getLastWeekMs()
7. getMon()
8. getMonday(String date)
9. getMonday(String date, int weekDay)