Java Month Get getMonth(long date, int increment)

Description

get Month

License

Open Source License

Declaration

private static long getMonth(long date, int increment) 

Method Source Code

//package com.java2s;
/*/*from  www  . ja  v a2 s  .c  o  m*/
 * $Id: DateUtils.java,v 1.1 2004/08/12 00:24:33 dmouse Exp $
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

import java.util.*;

public class Main {
    private static Calendar CALENDAR = Calendar.getInstance();

    private static long getMonth(long date, int increment) {
        Calendar calendar = CALENDAR;
        synchronized (calendar) {
            calendar.setTimeInMillis(date);
            if (increment == -1) {
                calendar.set(Calendar.DAY_OF_MONTH, 1);
                return startOfDayInMillis(calendar.getTimeInMillis());
            } else {
                calendar.add(Calendar.MONTH, 1);
                calendar.set(Calendar.DAY_OF_MONTH, 1);
                calendar.set(Calendar.HOUR_OF_DAY, 0);
                calendar.set(Calendar.MILLISECOND, 0);
                calendar.set(Calendar.SECOND, 0);
                calendar.set(Calendar.MINUTE, 0);
                calendar.add(Calendar.MILLISECOND, -1);
                return calendar.getTimeInMillis();
            }
        }
    }

    /**
    * Returns day in millis with the hours, milliseconds, seconds and minutes
    * set to 0.
    *
    * @param date long used in calculating start of day
    * @return Start of <code>date</code>
    */
    public static long startOfDayInMillis(long date) {
        Calendar calendar = CALENDAR;
        synchronized (calendar) {
            calendar.setTimeInMillis(date);
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MILLISECOND, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.set(Calendar.MINUTE, 0);
            return calendar.getTimeInMillis();
        }
    }
}

Related

1. getMonth(int i)
2. getMonth(int i)
3. getMonth(int month)
4. getMonth(int month)
5. getMonth(Integer month)
6. getMonth(long l)
7. getMonth(SimpleDateFormat df, String dateStr)
8. getMonth(String aDate)
9. getMonth(String date)