Year isLeap() method in Java with Examples

Last Updated : 27 Nov, 2018
The isLeap() method of Year class in Java is used to check if this Year object is a leap year or not according to the proleptic calendar system rules. A year is a leap year if it has 366 days in it. According to the proleptic calendar system rules, a year is a Leap year if:
  • If it is divisible by 4.
  • It is not divisible by 100 but it can be divisible by 400.
Syntax: 
public boolean isLeap()
Parameter: This method does not accepts any parameter. Return Value: It returns a boolean True value if this Year object's value is a leap year according to the proleptic calendar system rules, otherwise it returns False. Below programs illustrate the isLeap() method of Year in Java: Program 1: Java 
// Program to illustrate the isLeap() method

import java.util.*;
import java.time.*;

public class GfG {
    public static void main(String[] args)
    {
        // Create first Year object
        Year firstYear = Year.of(2016);

        // Check if this year object's value is
        // a leap year or not
        System.out.println(firstYear.isLeap());
    }
}
Output: 
true
Program 2: Java 
// Program to illustrate the isLeap() method

import java.util.*;
import java.time.*;

public class GfG {
    public static void main(String[] args)
    {
        // Create first Year object
        Year firstYear = Year.of(1990);

        // Check if this year object's value is
        // a leap year or not
        System.out.println(firstYear.isLeap());
    }
}
Output: 
false
Reference: https://docs.oracle.com/javase/8/docs/api/java/time/Year.html#isLeap--
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