Java Data Type - 如何创建从年月日的日期

import java.time.LocalDate;
import java.time.Month;
import java.time.MonthDay;
import java.time.Year;

public class Main {

  public static void main(String[] args) {
    Year year_2014 = Year.of(2014);
    System.out.println(year_2014);
    
    LocalDate year_month_day = Year.of(2014).atMonth(3).atDay(23);
    System.out.println(year_month_day);
    
    LocalDate year_and_day = Year.of(1974).atDay(77); // 1974-03-18
    System.out.println(year_and_day);
    
    
    System.out.println(MonthDay.of(Month.FEBRUARY, 29));
    
  }
}