Question

Use Java

(Find the number of days in a month)

Write a program that prompts the user to enter the month and year and displays the number of days in the month.

For example,

If the user entered month 2 and year 2012, the program should display that February 2012 has 29 days.

If the user entered month 3 and year 2015, the program should display that March 2015 has 31 days.

Sample Run 1

Enter a month in the year (e.g., 1 for Jan): 2
Enter a year: 2012
February 2012 has 29 days

Sample Run 2

Enter a month in the year (e.g., 1 for Jan): 4
Enter a year: 2005
April 2005 has 30 days

Sample Run 3

Enter a month in the year (e.g., 1 for Jan): 2
Enter a year: 2006
February 2006 has 28 days

Sample Run 4

Enter a month in the year (e.g., 1 for Jan): 2
Enter a year: 2000
February 2000 has 29 days

Class Name: Exercise03_11

If you get a logical or runtime error, please refer https://liveexample.pearsoncmg.com/faq.html.

Answer 1

import java.util.Scanner;

public class Pearson {
        public static void main(String[] args) throws Exception {
                Scanner sc = new Scanner(System.in);
                String arr[] = { " ", "January", "February", "March", "April", "May", "June", "July", "August", "September",
                                "October", "November", "December" };
                int days = 0;
                System.out.print("Enter a month in the year: ");
                int month = sc.nextInt();
                System.out.println("Enter a year) ");
                int year = sc.nextInt();
                days = getDays(month, year);
                System.out.println(arr[month] + " " + year + " has " + days + " days");

        }

        private static int getDays(int mm, int aYy) {
                int res = -1;
                if (mm == 1)
                        res = 31;

                if (mm == 2)
                        if (isLeapYear(aYy))
                                res = 29;
                        else
                                res = 28;

                if (mm == 3)
                        res = 31;

                if (mm == 4)
                        res = 30;

                if (mm == 5)
                        res = 31;

                if (mm == 6)
                        res = 30;

                if (mm == 7)
                        res = 31;

                if (mm == 8)
                        res = 31;

                if (mm == 9)
                        res = 30;

                if (mm == 10)
                        res = 31;

                if (mm == 11)
                        res = 30;

                if (mm == 12)
                        res = 31;

                return res;
        }

        private static boolean isLeapYear(int userYear) {
                boolean leap = false;
                // if any year is divisable by 4 than there are many chances for leap
                // year except few
                if (userYear % 4 == 0) {
                        // if it is divisable by 100 than it shoud also divisable by 400
                        // like 2000 etc
                        if (userYear % 100 == 0) {
                                // year is divisible by 400, so the year is a leap year
                                if (userYear % 400 == 0)
                                        leap = true;
                                else
                                        leap = false;
                        } else
                                leap = true;
                } else
                        leap = false;
                return leap;
        }

}

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