Step by Step solution about How to resolve the algorithm Long year step by step in the Java programming language

The Java program is a simple application that determines if a year is a "long year". A long year is a year that has 53 weeks instead of the usual 52 weeks. This program iterates through the years from 2000 to 2099 and checks if each year is a long year. If a year is a long year, its number is printed.

Here's a breakdown of the program:

1. import java.time.LocalDate; and import java.time.temporal.WeekFields;: These lines import the necessary classes and interfaces from the Java Time API, which provides support for working with dates and times.

2. public class LongYear {: This line declares the main class of the program, which is named LongYear.

3. public static void main(String[] args) {: This is the main method of the program. It's where the program execution starts.

4. System.out.printf("Long years this century:%n");: This line prints a message to the console, indicating that the program will display the long years in the current century.

5. for (int year = 2000; year < 2100; year++){: This loop iterates through the years from 2000 to 2099.

6. if (longYear(year)){: For each year, the longYear method is called to determine if it's a long year.

7. System.out.print(year + " ");: If the year is a long year, its number is printed to the console.

8. private static boolean longYear(int year){: This method takes a year as an argument and returns true if it's a long year, and false otherwise.

9. return LocalDate.of(year, 12, 28).get(WeekFields.ISO.weekOfYear()) == 53;: This line is the core of the longYear method. It uses the Java Time API to create a LocalDate object for December 28th of the specified year. Then, it gets the week-of-year for that date using the WeekFields.ISO field. If the week-of-year is 53, it means the year has 53 weeks, and the method returns true. Otherwise, it returns false.

In summary, this program helps identify and display the long years within a specified century. A long year occurs when December 28th falls on the 53rd week of the year, indicating an extra week compared to most non-leap years.

import java.time.LocalDate;
import java.time.temporal.WeekFields;

public class LongYear {

    public static void main(String[] args) {
        System.out.printf("Long years this century:%n");
        for (int year = 2000 ; year < 2100 ; year++ ) {
            if ( longYear(year) ) {
                System.out.print(year + "  ");
            }
        }
    }
    
    private static boolean longYear(int year) {
        return LocalDate.of(year, 12, 28).get(WeekFields.ISO.weekOfYear()) == 53;
    }

}