Java Program to Check Leap Year

To understand this example, you should have the knowledge of the following Java programming topics:

A leap year is exactly divisible by 4 except for century years (years ending with 00). The century year is a leap year only if it is perfectly divisible by 400.

Example: Java Program to Check a Leap Year

public class Main {

  public static void main(String[] args) {

    // year to be checked
    int year = 1900;
    boolean leap = false;

    // if the year is divided by 4
    if (year % 4 == 0) {

      // if the year is century
      if (year % 100 == 0) {

        // if year is divided by 400
        // then it is a leap year
        if (year % 400 == 0)
          leap = true;
          leap = false;
      // if the year is not century
        leap = true;
      leap = false;

    if (leap)
      System.out.println(year + " is a leap year.");
      System.out.println(year + " is not a leap year.");


1900 is not a leap year.

In the above example, we are checking if the year 1900 is a leap year or not. Since 1900 is a century year (ending with 00), it should be divisible by both 4 and 400 to be a leap year.

However, 1900 is not divisible by 400. Hence, it is not a leap year.

Now, let's change the year to 2012. The output will be

2012 is a leap year.

Here, 2012 is not a century year. Hence, to be a leap year, it needs to be divisible by only 4.

Since 2012 is divisible by 4, it is a leap year.

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