IsoChronology isLeapYear() method in Java with Example

The isLeapYear() method of java.time.chrono.IsoChronology class is used to differentiate between a leap year and a non-leap year. If it is a leap year it will return true otherwise false.

Syntax:

public boolean isLeapYear(long prolepticYear)

Parameter: This method takes prolepticYear as a parameter for checking if it is a leap year or not.

Return Value: This method returns Boolean value true if the proleptic year is leap year otherwise false.

Below are the examples to illustrate the isLeapYear() method:



Example 1:

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// Java program to demonstrate
// isLeapYear() method
  
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        // creating and initializing LocalDate Object
        LocalDate hidate = LocalDate.now();
  
        // getting IsoChronology used in LocalDate
        IsoChronology crono = hidate.getChronology();
  
        // getting id of this Chronology
        // by using isLeapYear() method
        boolean flag = crono.isLeapYear(1444);
  
        // display the result
        if (flag)
            System.out.println("this is leap year");
        else
            System.out.println("this is non leap year");
    }
}

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Output:

this is leap year

Example 2:

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// Java program to demonstrate
// isLeapYear() method
  
import java.util.*;
import java.io.*;
import java.time.*;
import java.time.chrono.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        // creating and initializing LocalDate Object
        LocalDate hidate = LocalDate.now();
  
        // getting IsoChronology used in LocalDate
        IsoChronology crono = hidate.getChronology();
  
        // getting id of this Chronology
        // by using isLeapYear() method
        boolean flag = crono.isLeapYear(2005);
  
        // display the result
        if (flag)
            System.out.println("this is leap year");
        else
            System.out.println("this is non leap year");
    }
}

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Output:

this is non leap year

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/IsoChronology.html#isLeapYear-long-

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