Java Leap Year Check isLeapYear(int year)

Description

Determines whether or not a year is a leap year.

License

Apache License

Parameter

Parameter	Description
year	The year.

Return

true if the year is a leap year.

Declaration

private static boolean isLeapYear(int year) 

Method Source Code

//package com.java2s;
/*/*w ww .j a v a 2s . com*/
 * Copyright The Sett Ltd, 2005 to 2014.
 *
 * Licensed 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
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 */

public class Main {
    /**
     * Determines whether or not a year is a leap year. This takes no account of when leap years were first introduced,
     * so will not be accurate for ancient dates.
     *
     * @param  year The year.
     *
     * @return <tt>true</tt> if the year is a leap year.
     */
    private static boolean isLeapYear(int year) {
        if ((year & 3) != 0) {
            return false;
        }

        if ((year % 100) != 0) {
            return true;
        }

        return (year % 400) == 0;
    }
}

Related

1. isLeapYear(int y)
2. isLeapYear(int year)
3. isLeapYear(int year)
4. isLeapYear(int year)
5. isLeapYear(int year)
6. isLeapYear(int year)
7. isLeapYear(int year)
8. isLeapYear(int year)
9. isLeapYear(int year)