Here you can find the source of dayOfYear(int year, int month, int day)
protected static int dayOfYear(int year, int month, int day)
//package com.java2s; /**/*from w w 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. */ import java.util.Calendar; public class Main { protected static int dayOfYear(int year, int month, int day) { return getCalendar(year, month, day).get(Calendar.DAY_OF_YEAR); } protected static Calendar getCalendar(int year, int month, int day) { Calendar calendar = Calendar.getInstance(); calendar.set(year, month - 1, day, 0, 0, 0); calendar.set(Calendar.MILLISECOND, 0); return calendar; } }