Java Date to Day getDayOfYear(Date date)

Description

get Day Of Year

License

Apache License

Declaration

public static int getDayOfYear(Date date) 

Method Source Code

//package com.java2s;
/*/*  ww w . j a  v a  2  s.c  om*/
 * Licensed to The Apereo Foundation under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 *
 * The Apereo Foundation licenses this file to you 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.
 * 
*/

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

public class Main {
    public static int getDayOfYear(Date date) {
        Calendar c = Calendar.getInstance(Locale.US);
        c.setTime(date);
        return c.get(Calendar.DAY_OF_YEAR);
    }

    public static int getDayOfYear(int day, int month, int year) {
        Calendar cal = calendarFor(day, month, year);
        int idx = cal.get(Calendar.DAY_OF_YEAR);
        if (month < 0 || month >= 12) {
            int actualYear = calculateActualYear(month, year);
            if (month < 0) {
                while (actualYear < year) {
                    cal.set(actualYear, 11, 31);
                    idx += (-1 * cal.get(Calendar.DAY_OF_YEAR));
                    actualYear++;
                }
            } else {
                while (actualYear > year) {
                    actualYear--;
                    cal.set(actualYear, 11, 31);
                    idx += cal.get(Calendar.DAY_OF_YEAR);
                }
            }
        }
        return idx - 1;
    }

    private static Calendar calendarFor(int day, int month, int year) {
        Calendar cal = Calendar.getInstance(Locale.US);
        cal.set(calculateActualYear(month, year), (month < 0 ? (12 + (month % 12)) : month % 12), day);
        return (cal);
    }

    public static int calculateActualYear(int month, int year) {
        return (year + (month < 0 ? (month / 12) - 1 : month >= 12 ? (month / 12) : 0));
    }
}

Related

1. getDayFromDate(Date date)
2. getDayMonthYear(Date aDate, boolean isAddSpace)
3. getDayNumber(Date startDate, Date endDate)
4. getDayOfDate(Date date)
5. getDayOfThisYear(Date currentdate)
6. getDays(Date t, Date baseDate)
7. getDaysEarlierDate(int days)
8. getDayShort(Date date)
9. getDaysMin(Date d)