Java Program to Check Whether a Given Year is a Leap Year

Leap Year Program in Java: A year is a Leap Year if it satisfies the following conditions:

• The year is exactly divisible by 400 (such as 2000,2400) or,
• The year is exactly divisible by 4 (such as 2008, 2012, 2016) and not a multiple of 100 (such as 1900, 2100, 2200).

Write a Java Program to check whether a given year is a leap year or not.

1. Take a year as input.
2. Check whether a given year is divisible by 400.
3. Check whether a given year is divisible by 100.
4. Check whether a given year is divisible by 4.
5. If the condition at step 2 and 4 becomes true, then the year is a leap year.
6. If the condition at step 3 becomes true, then the year is not a leap year.

Here is the source code of the Java Program to Find if a Given Year is a Leap Year. The Java program is successfully compiled and run on a Windows system. The program output is also shown below.

import java.util.Scanner;
public class Check_Leap_Year 
{
    public static void main(String args[])
    {
        Scanner s = new Scanner(System.in);
        System.out.print("Enter any year:");
        int year = s.nextInt();
        boolean flag = false;
        if(year % 400 == 0)
        {
            flag = true;
        }
        else if (year % 100 == 0)
        {
            flag = false;
        }
        else if(year % 4 == 0)
        {
            flag = true;
        }
        else
        {
            flag = false;
        }
        if(flag)
        {
            System.out.println("Year "+year+" is a Leap Year");
        }
        else
        {
            System.out.println("Year "+year+" is not a Leap Year");
        }
    }
}

1. Enter any year as an input. We first whether the given year is divisible by 400 or not.
2. If it is divisible then it is a leap year else we check for further conditions.
3. Now if it is divisible by 100 then it is not a leap year or else we further divide it by 4.
4. If it is divisible then it is a leap year else its not.

Testcase 1: In this case, we enter the year “1800” as input to check whether a given year is leap year or not.

Enter any year:
1800
1800 is not a Leap Year

Testcase 2: In this case, we enter the year “2000” as input to check whether a given year is leap year or not.

Enter any year:
2000
2000 is a Leap Year

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