Java Year Get getRandomDate(int firstYar, int lastYear)

Description

get Random Date

License

Open Source License

Declaration

public static GregorianCalendar getRandomDate(int firstYar, int lastYear) 

Method Source Code

//package com.java2s;
/*/*from  www  .  j av a 2s.co m*/
 * *********************************************************************
 * Copyright (c) 2010 Pedro Gomes and Universidade do Minho.
 * All rights reserved.
 * 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.*;

public class Main {
    private static Random rand = new Random();

    public static GregorianCalendar getRandomDate(int firstYar, int lastYear) {
        int month, day, year, maxday;

        year = getRandomInt(firstYar, lastYear);
        month = getRandomInt(0, 11);

        maxday = 31;
        if (month == 3 | month == 5 | month == 8 | month == 10) {
            maxday = 30;
        } else if (month == 1) {
            maxday = 28;
        }

        day = getRandomInt(1, maxday);
        return new GregorianCalendar(year, month, day);
    }

    public static int getRandomInt(int lower, int upper) {

        int num = (int) Math.floor(rand.nextDouble() * ((upper + 1) - lower));
        if (num + lower > upper || num + lower < lower) {
            System.out.println("ERROR: Random returned value of of range!");
            System.exit(1);
        }
        return num + lower;
    }
}

Related

1. getLastDayOfYear(Date date)
2. getNextYear()
3. getNextYearFirst()
4. getNextYearMonthStr()
5. getOfflimitDates(int year)
6. getSpecficYearEnd(Date date, int amount)
7. getStartEndOFWeek(int enterWeek, int enterYear)
8. getStartOfYear()
9. getThisYear()