Java Day in Month getDaysInMonth(int month, int year)

Description

get Days In Month

License

Open Source License

Declaration

public static int getDaysInMonth(int month, int year) 

Method Source Code

//package com.java2s;
/* Copyright (C) 2000-2003 The Software Conservancy as Trustee.
 * All rights reserved./*from  www . j  a v a 2s.c  o  m*/
 *
 * 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.
 *
 * Nothing in this notice shall be deemed to grant any rights to trademarks,
 * copyrights, patents, trade secrets or any other intellectual property of the
 * licensor or any contributor except as expressly stated herein. No patent
 * license is granted separate from the Software, for code that you delete from
 * the Software, or for combinations of the Software with other software or
 * hardware.
 */

public class Main {
    private static final int days_in_month[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

    public static int getDaysInMonth(int month, int year) {
        int m = days_in_month[month - 1];

        if (month == 2 && isLeapYear(year)) {
            m++;
        }

        return m;
    }

    private static boolean isLeapYear(int year) {
        if (year % 4 != 0) {
            return false;
        }

        if (year % 400 == 0) {
            return true;
        }

        return (year % 100 != 0);
    }
}

Related

1. getDayOfMonth(String dateKey)
2. getDayOfMonthSuffix(final int day)
3. getDayOrMonth(int value)
4. getDaysByMonth(int month)
5. getDaysInMonth(int month, int year)
6. getDaysInMonth(int monthNum)
7. getDaysInMonth(int year, int month)
8. getDaysInMonths()
9. getDaysOfMonth(Date startdate, Date enddate, String month)