Question

Write a class named MonthDays. The class’s constructor should accept two arguments:
l An integer for the month (1 = January, 2 February, etc).
l An integer for the year
The class should have a method named getNumberOfDays that returns the number of days
in the specified month. The method should use the following criteria to identify leap years:
1. Determine whether the year is divisible by 100. If it is, then it is a leap year if and
if only it is divisible by 400. For example, 2000 is a leap year but 2100 is not.
2. If the year is not divisible by 100, then it is a leap year if and if only it is divisible
by 4. For example, 2008 is a leap year but 2009 is not.
Demonstrate the class in a program that asks the user to enter the month (letting the user
enter an integer in the range of 1 through 12) and the year. The program should then display
the number of days in that month. Here is a sample run of the program:
Enter a month (1-12): 2 [Enter]
Enter a year: 2008 [Enter]
29 days

+++++Java code

Answer 1

Provided Java Code done as per your requirements.

• "Screen shot program" code for better understanding.
• "Code to copy" for the program execution.

Screen shot program:

Output 1:

Output 2:

Code to copy:

//Header file section
import java.util.Scanner;

//main class
public class MonthDays {
// Declare variables
int month;
int year;
int numDays;

// constructor accept two arguments
public MonthDays(int monthNum, int yearNum) {
  month = monthNum;
  year = yearNum;
}

// method named getNumberOfDays that returns the
// number of days
public int getNumberOfDays(int monthNums) {
  if (monthNums == 2) {
   if ((year % 100 == 0) && (year % 400 == 0) || (year % 4 == 0)
     && !(year % 100 == 0))
    numDays = 29;
   else
    numDays = 28;
  } else if (monthNums == 1 || monthNums == 3 || monthNums == 5
    || monthNums == 7 || monthNums == 8 || monthNums == 10
    || monthNums == 12)
   numDays = 31;
  else
   numDays = 30;
  return numDays;
}

// main method
public static void main(String[] args) {
  // Declare variables
  int month, year, days;

  // Create a Scanner class's object
  Scanner input = new Scanner(System.in);

  // Prompt and read input from the user
  System.out.print("Enter a month (1-12):");
  month = input.nextInt();
  System.out.print("Enter a year:");
  year = input.nextInt();
  // Call the MonthDays class's constructor object
  MonthDays md = new MonthDays(month, year);
  // Call the function
  days = md.getNumberOfDays(month);
  // Display output
  System.out.println(days + " days");

}
}