Java Day Of Year dayOfYear(int year, int month, int day)

Description

Day of year.

License

Apache License

Parameter

Parameter	Description
year	a parameter
month	a parameter
day	a parameter

Declaration

public static int dayOfYear(int year, int month, int day) 

Method Source Code

//package com.java2s;
/**/*from  ww w.  j  a  v  a  2 s.com*/
 * Copyright 2013-present febit.org (support@febit.org)
 *
 * 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 {
    private final static int[] DAYS_OF_YEAR_PER_MONTH = new int[] { 0, 31, // 1
            59, // 2
            90, // 3
            120, // 4
            151, // 5
            181, // 6
            212, // 7
            243, // 8
            273, // 9
            304, // 10
            334, // 11
            365, // 12
    };

    /**
     * Day of year.
     *
     * @param year
     * @param month
     * @param day
     * @return
     */
    public static int dayOfYear(int year, int month, int day) {
        return DAYS_OF_YEAR_PER_MONTH[month - 1] + day + (month >= 3 && isLeapYear(year) ? 1 : 0);
    }

    public static int dayOfYear(int dayMark) {
        return dayOfYear(getYearOfDayMark(dayMark), getMonthOfDayMark(dayMark), getDayOfDayMark(dayMark));
    }

    public static boolean isLeapYear(final int year) {
        return ((year % 4) == 0) // must be divisible by 4...
                && ((year < 1582) // and either before reform year...
                        || ((year % 100) != 0) // or not a century...
                        || ((year % 400) == 0)); // or a multiple of 400...
    }

    public static int getYearOfDayMark(int day) {
        return day / 10000;
    }

    public static int getMonthOfDayMark(int day) {
        return (day % 10000) / 100;
    }

    public static int getDayOfDayMark(int day) {
        return day % 100;
    }
}

Related

1. currentYearMonthDay()
2. dateOfYearBetween(final int month, final int dayOfMonth, final int fromMonth, final int fromDayOfMonth, final int toMonth, final int toDayOfMonth)
3. dayOfYear(final int year, final int month, final int day)
4. dayOfYear(int month, int day, int year)
5. dayOfYear(int year, int month, int date)
6. dayOfYear(int year, int month, int day)
7. daysInPriorYears(final int y)
8. daysInPriorYears(int yr)
9. daysInPriorYears(int yr, boolean use1904windowing)