Subtract weeks to the given Date object and returns it. - Java java.util

Java examples for java.util:Week

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Description

Subtract weeks to the given Date object and returns it.

Demo Code

/**/* w w w . j a va  2s.co  m*/
 * The MIT License
 *
 * Copyright (C) 2007 Asterios Raptis
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
//package com.java2s;

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

public class Main {
    public static void main(String[] argv) throws Exception {
        Date date = new Date();
        int substractWeeks = 2;
        System.out.println(substractWeeksFromDate(date, substractWeeks));
    }

    /**
     * Subtract weeks to the given Date object and returns it.
     *
     * @param date
     *            The Date object to substract the weeks.
     * @param substractWeeks
     *            The weeks to substract.
     * @return The resulted Date object.
     */
    public static Date substractWeeksFromDate(final Date date,
            final int substractWeeks) {
        return substractDaysFromDate(date, substractWeeks * 7);
    }

    /**
     * Subtract days to the given Date object and returns it.
     *
     * @param date
     *            The Date object to substract the days.
     * @param substractDays
     *            The days to substract.
     * @return The resulted Date object.
     */
    public static Date substractDaysFromDate(final Date date,
            final int substractDays) {
        final Calendar dateOnCalendar = Calendar.getInstance();
        dateOnCalendar.setTime(date);
        dateOnCalendar.add(Calendar.DATE, substractDays * -1);
        return dateOnCalendar.getTime();
    }
}

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