Java Date Calculate calculateGestationAge(Date today, Date edd)

Description

calculate Gestation Age

License

Open Source License

Declaration

public static int calculateGestationAge(Date today, Date edd) 

Method Source Code

//package com.java2s;
/**/*from w  w  w  . ja  v  a  2  s.  c  o m*/
 * Copyright (c) 2001-2002. Department of Family Medicine, McMaster University. All Rights Reserved.
 * This software is published under the GPL GNU General Public License.
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version. 
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 * This software was written for the
 * Department of Family Medicine
 * McMaster University
 * Hamilton
 * Ontario, Canada
 */

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

public class Main {
    public static int calculateGestationAge(Date today, Date edd) {
        int i = 40;
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(edd);
        //Is Today before edd
        if (today.before(edd)) {

            while (today.before(calendar.getTime()) || today.equals(calendar.getTime())) {
                i--;
                calendar.add(Calendar.DAY_OF_YEAR, -7);
                if (i < 0) {
                    break;
                }
            }
            i++;
        } else if (today.after(edd)) {
            // Weeks past 40 weeks? 
            while (today.after(calendar.getTime())) {
                i++;
                calendar.add(Calendar.DAY_OF_YEAR, 7);
            }
        }

        if (i < 0) {
            i = 0;
        }
        return i;
    }
}

Related

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2. calculateDate(Date date, int field, int value)
3. calculateDays(Date startDate, Date endDate)
4. calculateDurationEndInSec(Date start, int durationInSeconds)
5. calculateEndDate(Date startDate, int duration)
6. calculateLookbackDate(int lookback)
7. calculateMonthIn(Date date1, Date date2)
8. calculateNextSettleDate(Date date, int addMonth)
9. calculateOffsetFromGMT(Date date)