Answer to Question #309878 in Java | JSP | JSF for sowmya

Question

Program in Java

PROGRAM DESIGN

Create a class Date that can perform the following operations on a date:

- Set/Return the Month

- Set/Return the Day

- Set/Return the Year

- Whether the year is a leap year.

if the year number isn't divisible by 4, it is a common year;

otherwise, if the year number isn't divisible by 100, it is a leap year;

otherwise, if the year number isn't divisible by 400, it is a common year;

otherwise, it is a leap year.

- Return the number of days in a month

April, June, September, November has 30 days otherwise 31 except for Feb (refer to leap year)

- Print the month in string format followed by the date and year

SAMPLE INPUT1

2020

2

15

SAMPLE OUTPUT1

February 15, 2020

29 days

2020 is a Leap Year

SAMPLE INPUT2

2019

2

29

SAMPLE OUTPUT2

Invalid number of days

SAMPLE INPUT3

2019

3

15

SAMPLE OUTPUT3

March 15, 2019

31 days

2019 is a Common Year

Answer 1

import java.util.*;


class Date {
	private int day, month, year;
	private int days_per_month[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	private String monthNames[] = { "January", "February", "March", "April", "May", "June", "July", "August",
			"September", "October", "November", "December" };


	public Date(int month, int day, int year) {
		this.day = day;
		this.month = month;
		this.year = year;
	}


	/**
	 * if the year number isn't divisible by 4, it is a common year;
	 * 
	 * otherwise, if the year number isn't divisible by 100, it is a leap year;
	 * 
	 * otherwise, if the year number isn't divisible by 400, it is a common year;
	 * 
	 * otherwise, it is a leap year.
	 * 
	 * @param year
	 * @return
	 */
	boolean isLeapYear(int year) {
		return (((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0));
	}


	public String toString() {
		String leapYear = "Common Year";
		int days = days_per_month[this.month - 1];
		if (this.day > days) {
			return "Invalid number of days";
		}
		if (isLeapYear(year)) {
			leapYear = "Leap Year";
			if (this.month == 2) {
				days = 29;
				if (this.day > days) {
					return "Invalid number of days";
				}
			}
		}


		return monthNames[this.month - 1] + " " + day + ", " + year + "\n" + days + " days\n" + year + " is a "
				+ leapYear;
	}
	// Setters and getters,


	/**
	 * @return the day
	 */
	public int getDay() {
		return day;
	}


	/**
	 * @param day the day to set
	 */
	public void setDay(int day) {
		this.day = day;
	}


	/**
	 * @return the month
	 */
	public int getMonth() {
		return month;
	}


	/**
	 * @param month the month to set
	 */
	public void setMonth(int month) {
		this.month = month;
	}


	/**
	 * @return the year
	 */
	public int getYear() {
		return year;
	}


	/**
	 * @param year the year to set
	 */
	public void setYear(int year) {
		this.year = year;
	}
}


class App {


	public static void main(String[] args) {
		Scanner keyboard = new Scanner(System.in);
		int year = keyboard.nextInt();
		int month = keyboard.nextInt();
		int day = keyboard.nextInt();
		Date d = new Date(month, day, year);
		System.out.println(d.toString());


		keyboard.close();
	}
}