Java java.time.Year用法及代碼示例

// Java Program to illustrate java.time.Year class
import java.time.*;
// Importing all classes from
// time package to get other functionalities
import java.time.Year;
//  Class
public class GFG {
    // Main driver method
    public static void main(String[] args)
    {
        // Object 1
        // Creating an Year class object
        // getting the current year each
        // using the now() method
        Year y = Year.now();
        // Print and display the current year
        System.out.println("Current year: " + y);
        // Object 2
        // Creating another Year class object Object
        // Here year 2020 as passed as an argument
        Year y1 = Year.of(2020);
        // Object 3
        // Creating another object of year class
        // again passing year 2022 as an argument
        Year y2 = Year.of(2022);
        // Now, creating a LocalDate object and
        // getting the local date at the day
        // passed as an argument
        // Custom input argument = 350
        LocalDate l = y.atDay(350);
        // Print the local date
        System.out.println("Local date: " + l);
        // Now, creating a YearMonth
        // and retrieving month using atMonth() method
        // by passing argument to the method
        // Custom input argument- 6
        YearMonth ym = y.atMonth(6);
        // Print the year and the month
        System.out.println("Year and month: " + ym);
        // Printing number of days of current Year
        System.out.println("Number of days: " + y.length());
        // Checking if Year y
        // is before Year y2
        System.out.println("2021 is before 2022: "
                           + y.isBefore(y2));
        // check if Year y
        // is after Year y1
        System.out.println("2021 is after 2020: "
                           + y.isAfter(y1));
        // Now, printing hashcode of the year
        // using the hashcode() method
        System.out.println("Hashcode of the year: "
                           + y.hashCode());
        // Checking whether the year is leap year or not
        System.out.println("2020 is leap year: "
                           + y1.isLeap());
        // Adding 150 years to the current year
        System.out.println("2021 - 155 years: "
                           + y.minusYears(155));
        // Subtracting 150 years from the current year
        System.out.println("2021 + 145 years: "
                           + y.plusYears(145));
    }
}