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

The provided Java code has two classes, Leapyear and IsLeap, each demonstrating different approaches to determine whether a given year is a leap year. Here's a breakdown of both classes:

1. Leapyear Class:

• This class uses the GregorianCalendar class from java.util to check if a year is a leap year.

• It defines an array yrs containing several years, including some that are leap years and some that are not.

• It then iterates through the years in the yrs array and prints the results of checking whether each year is a leap year using both the GregorianCalendar method isLeapYear(year) and a custom isLeapYear(year) method defined within the class.

• The isLeapYear(year) method of the Leapyear class implements a custom logic to determine leap years based on the following rules:

• If a year is divisible by 100, it is a leap year only if it is also divisible by 400.
• If a year is not divisible by 100, it is a leap year if it is divisible by 4.

2. IsLeap Class:

• This class uses the Year class from java.time (introduced in Java 8) to check if a year is a leap year.
• It has a simple main method that prints whether the year 2004 is a leap year using the isLeap(2004) method of the Year class.

The output of the Leapyear class would be:

The year 1800 is leaper: false / false.
The year 1900 is leaper: false / false.
The year 1994 is leaper: false / false.
The year 1998 is leaper: true / true.
The year 1999 is leaper: false / false.
The year 2000 is leaper: true / true.
The year 2001 is leaper: false / false.
The year 2004 is leaper: true / true.
The year 2100 is leaper: false / false.

The output of the IsLeap class would be:

true

In summary, both the Leapyear and IsLeap classes demonstrate different ways to determine whether a given year is a leap year. The Leapyear class uses a custom logic, while the IsLeap class leverages the Year class introduced in Java 8 for this purpose.

import java.util.GregorianCalendar;
import java.text.MessageFormat;

public class Leapyear{
        public static void main(String[] argv){
                int[] yrs = {1800,1900,1994,1998,1999,2000,2001,2004,2100};
                GregorianCalendar cal = new GregorianCalendar();
                for(int year : yrs){
                        System.err.println(MessageFormat.format("The year {0,number,#} is leaper: {1} / {2}.",
                                                                 year, cal.isLeapYear(year), isLeapYear(year)));
                }

        }
        public static boolean isLeapYear(int year){
                return (year % 100 == 0) ? (year % 400 == 0) : (year % 4 == 0);
        }
}


import java.time.Year;

public class IsLeap {

    public static void main(String[] args) {
        System.out.println(Year.isLeap(2004));
    }
}