Check Leap Year in Java

Java Program to Check the Year is Leap Year

Last Updated: 09 July, 2022

What is Leap Year?

The total number of days in a year is 365 days.
But a leap year has 365 days + 1 day = 366 days, In a leap year, the February month is 29 days instead of 28. A leap occurs once every four years.

To check whether the year is a leap year or not, we can check it through the simple Java program given below.

Program: Java Leap Year Program

  
  import java.util.Scanner;
  public class LeapYear {
    public static void main(String[] args) {
      
      System.out.println("Enter the valid Year:");
      Scanner scanner = new Scanner(System.in);
      int year = scanner.nextInt();
      boolean isLeapYear = false;
      
      // Year must be divided by 4
      if (year % 4 == 0) {
        // Checking the year is a century
        if (year % 100 == 0) {
          // if year is divided by 400 then it is a leap year
          if (year % 400 == 0)
            isLeapYear = true;
          else
            isLeapYear = false;
        }
        else
          isLeapYear = true;
      }
      if (isLeapYear)
        System.out.println(year + " is a leap year.");
      else
        System.out.println(year + " is not a leap year.");
    }
  }

We are passing the year 2022, It value is not divided by 4 so It's not a leap year.

We are passing the year 1900, since 1900 is a century year, 1900 is divided by 4 and 100 but not divided by 400 so it is not a leap year.

A century is a period of 100 years, it is ending with 00 and in the Java programming it must be divided by 4 and 400.

We are passing the year 2000, 2000 is also a century year and a leap year also because it is divided by 4 and 400 both.