Java GregorianCalendar isLeapYear() Method

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Description

The Java GregorianCalendar isLeapYear(int year) method determines if the given year is a leap year. Returns true if the given year is a leap year.

Declaration

Following is the declaration for java.util.GregorianCalendar.isLeapYear() method

public boolean isLeapYear(int year)

Parameters

year − the given year.

Return Value

This method returns true if the given year is a leap year; false otherwise.

Exception

NA

Checking an Year to be Leap Year Example

The following example shows the usage of Java GregorianCalendar isLeapYear(int) method. We're creating a GregorianCalendar instance of current date. We're checking if current year is leap year or not. Then we've checked another year for being a leap year.

package com.tutorialspoint;

import java.util.GregorianCalendar;

public class GregorianCalendarDemo {
   public static void main(String[] args) {

      // create a new calendar
      GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();

      // print the current date and time
      System.out.println("" + cal.getTime());

      // check if it is a leap year
      boolean isLeapYear = cal.isLeapYear(cal.get(GregorianCalendar.YEAR));
      System.out.println("Is leap year:" + isLeapYear);

      // check if 2012 is a leap year
      isLeapYear = cal.isLeapYear(2012);
      System.out.println("Is leap year:" + isLeapYear);
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Mon Apr 29 14:10:41 IST 2024
Is leap year:true
Is leap year:true

Checking Future Year to be Leap Year Example

The following example shows the usage of Java GregorianCalendar isLeapYear(int) method. We're creating a GregorianCalendar instance of current date. We've added two years to the calendar instance. Then we've checked it for being a leap year.

package com.tutorialspoint;

import java.util.GregorianCalendar;

public class GregorianCalendarDemo {
   public static void main(String[] args) {

      // create a new calendar
      GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();

      // print the current date and time
      System.out.println("" + cal.getTime());

      // add 2 years
      cal.add(GregorianCalendar.YEAR, 2);
	  
      // check if it is a leap year
      boolean isLeapYear = cal.isLeapYear(cal.get(GregorianCalendar.YEAR));
      System.out.println("Is leap year:" + isLeapYear);
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Mon Apr 29 14:11:02 IST 2024
Is leap year:false

Checking Past Year to be Leap Year Example

The following example shows the usage of Java GregorianCalendar isLeapYear(int) method. We're creating a GregorianCalendar instance of current date. We've subtracted two years from the calendar instance. Then we've checked it for being a leap year.

package com.tutorialspoint;

import java.util.GregorianCalendar;

public class GregorianCalendarDemo {
   public static void main(String[] args) {

      // create a new calendar
      GregorianCalendar cal = (GregorianCalendar) GregorianCalendar.getInstance();

      // print the current date and time
      System.out.println("" + cal.getTime());

      // subtract 2 years
      cal.add(GregorianCalendar.YEAR, -2);
	  
      // check if it is a leap year
      boolean isLeapYear = cal.isLeapYear(cal.get(GregorianCalendar.YEAR));
      System.out.println("Is leap year:" + isLeapYear);
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Mon Apr 29 14:11:22 IST 2024
Is leap year:false