The java.util.GregorianCalendar.isLeapYear() method determines if the given year passed as a parameter to the function is a leap year or not and returns true if the given year is a leap year and false otherwise.
Syntax:
public boolean isLeapYear(int year)
Parameters: This function accepts a single integer parameter year that represents the year which the function needs to check for whether it is a leap year or not.
Return Values: The function returns a boolean value. If the year passed as a parameter is a leap year, it returns true and false otherwise.
Examples:
Input : 2016 Output : true Input : 2018 Output : false
Below program illustrate the java.util.GregorianCalendar.isLeapYear() function in Java :
Program 1:
Java
// Java Program to illustrate isLeapYear() function // of GregorianCalendar  import java.io.*;import java.util.*;  class GFG {     public static void main(String[] args) {            // Create a new calendar      GregorianCalendar c = (GregorianCalendar)                  GregorianCalendar.getInstance();        // Display the current date and time      System.out.println("Current Date and Time : "                                 + c.getTime());        int year = c.get(GregorianCalendar.YEAR);      if(c.isLeapYear(year))      {           System.out.println(year +                           " is leap year");      }      else      {          System.out.println(year +                      " is Not a leap year");      }   }} |
Output:
Current Date and Time : Fri Jul 27 11:53:39 UTC 2018 2018 is Not a leap year
Program 2:
Java
// Java Program to illustrate isLeapYear() function // of GregorianCalendar  import java.io.*;import java.util.*;  class GFG {     public static void main(String[] args) {            // Create a new calendar      GregorianCalendar c = (GregorianCalendar)                 GregorianCalendar.getInstance();        // Display the current date and time      System.out.println("" + c.getTime());              // Modifying the current calendar      c.add((GregorianCalendar.MONTH), -30);        int year = c.get(GregorianCalendar.YEAR);      if(c.isLeapYear(year))      {           System.out.println(year + " is leap year");      }      else      {          System.out.println(year + " is Not a leap year");      }   }} |
Output:
Fri Jul 27 11:53:41 UTC 2018 2016 is leap year
Reference : https://docs.oracle.com/javase/7/docs/api/java/util/GregorianCalendar.html#isLeapYear()
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