Leaf Year in Java 8

1. Introduction

Determining whether a year is a leap year is essential for calendar calculations, particularly in applications involving date manipulation, scheduling, or planning. Java 8 introduced new Date-Time APIs, which include utility methods for handling such calculations more intuitively.

Key Points

1. A leap year is a year that has 366 days, with February having 29 days instead of 28.

2. The java.time.Year class in Java 8 simplifies the leap year check with the isLeap() method.

3. Leap years are typically every four years, except for years that are divisible by 100 but not by 400.

2. Program Steps

1. Import the java.time.Year class.

2. Create a method to check if a given year is a leap year.

3. Test the method with different year inputs.

3. Code Program

import java.time.Year;

public class LeapYearChecker {

    public static void main(String[] args) {
        // Test the checkLeapYear method with various inputs
        checkLeapYear(2020);
        checkLeapYear(2021);
        checkLeapYear(1900);
        checkLeapYear(2000);
    }

    public static void checkLeapYear(int year) {
        // Step 2: Check if the year is a leap year
        Year y = Year.of(year);
        boolean isLeap = y.isLeap();

        // Step 3: Print the result
        System.out.println(year + " is a leap year? " + isLeap);
    }
}

Output:

2020 is a leap year? true
2021 is a leap year? false
1900 is a leap year? false
2000 is a leap year? true

Explanation:

1. Year.of(year) creates a Year instance for the specified year.

2. y.isLeap() checks if the year represented by the Year instance is a leap year, based on the standard rules for leap years.

3. The output clearly indicates whether each tested year is a leap year, using the built-in leap year calculation logic provided by Java 8's Date-Time API.