Step by Step solution about How to resolve the algorithm Day of the week step by step in the Java programming language

The provided Java code is designed to determine the years between 2008 and 2121 when Christmas Day (December 25th) falls on a Sunday. Here's a detailed breakdown of the code:

1. Importing necessary packages:

• It starts by importing essential Java packages for date and time handling, including java.util.Calendar, java.util.Date, java.util.GregorianCalendar, and static java.util.Calendar.*. These packages provide classes and methods for working with dates and times.

2. main Method:

• The program's entry point is the main method.

3. Calendar Initialization:

• It initializes a Calendar instance named calendar using new GregorianCalendar(year, DECEMBER, 25). This sets the calendar to December 25th of the specified year.

4. Loop Through Years:

• The program enters a loop that iterates through years from 2008 to 2121, inclusive. The loop variable year is incremented by 1 in each iteration.

5. Checking if Christmas Falls on Sunday:

• For each year, it checks if Christmas Day (December 25th) falls on a Sunday. The program retrieves the day of the week for December 25th of the current year using calendar.get(DAY_OF_WEEK). If the result matches SUNDAY, it means Christmas falls on a Sunday for that year.

6. Printing Results:

• If Christmas falls on a Sunday for the current year, the program increments a counter (count) and prints the year to the console. A comma is added between the years to separate them.

7. Output:

• The program prints a list of years between 2008 and 2121 when Christmas Day (December 25th) falls on a Sunday. The output should look something like this:

2009, 2015, 2021, 2027, 2033, 2039, 2045, 2051, 2057, 2063, 2069, 2075, 2081, 2087, 2093, 2099, 2105, 2111, 2117

import static java.util.Calendar.*;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Yuletide{
	public static void main(String[] args) {
		Calendar calendar;
        int count = 1;
        for (int year = 2008; year <= 2121; year++) {
            calendar = new GregorianCalendar(year, DECEMBER, 25);
            if (calendar.get(DAY_OF_WEEK) == SUNDAY) {
                if (count != 1)
                    System.out.print(", ");
                System.out.printf("%d", calendar.get(YEAR));
                count++;
            }
        }
	}
}