In this example, we will use LocalDate class provided isLeapYear()  API to check if a given year is a leap year or not. A LocalDate represents a year-month-day in the ISO calendar and is useful for representing a date without a time. You might use a LocalDate to track a significant event, such as birth date or wedding date.

Read more about LocalDate class with an example at https://www.javaguides.net/2018/08/java-8-localdate-class-api-guide.html.

Check Whether the Given Year is Leap Year or Not in Java

LocalDate class provides below API to check if a given year is a leap year or not.

• boolean isLeapYear() - Checks if the year is a leap year, according to the ISO proleptic calendar system rules.

package com.ramesh.java8.datetime.api;

import java.time.LocalDate;
import java.time.Month;

/**
 * Program to demonstrate LocalDate Class APIs.
 * @author javaguides.net
 *
 */
public class LocalDateExamples {
 
    public static void main(String[] args) {
        checkIfYearIsLeapYear();
    }

    private static void checkIfYearIsLeapYear() {
        LocalDate localDate1 = LocalDate.of(2017, Month.JANUARY, 1);
        LocalDate localDate2 = LocalDate.of(2016, Month.JANUARY, 1);

        if (localDate1.isLeapYear()) {
            System.out.println(localDate1.getYear() + " is a leap year");
        } else {
            System.out.println(localDate1.getYear() + " is not a leap year");
        }

        if (localDate2.isLeapYear()) {
            System.out.println(localDate2.getYear() + " is a leap year");
        } else {
            System.out.println(localDate2.getYear() + " is not a leap year");
        }
    }
}

Output:

2017 is not a leap year
2016 is a leap year

Reference

https://www.javaguides.net/2018/08/java-8-localdate-class-api-guide.html