5-5计算二月份天数

Test类

package anli5_5;
//计算二月份天数
import java.time.LocalDate;
import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("请输入要查询的年份");
        int year= sc.nextInt();

        LocalDate ld =LocalDate.of(year,3,1);
        LocalDate ld2=  ld.plusDays(-1);
        System.out.println(year+"年的二月份有："+ld2.getDayOfMonth()+"天");
    }

}

结果展示