java键盘输入

import java.util.Scanner;
public class Day {
    public static void main(String[] args) {
     Scanner sc=new Scanner (System.in);
     while(sc.hasNext())
     {
      int year =sc.nextInt();
      int month=sc.nextInt();
      int day=sc.nextInt();
      int Day=outDay(year,month,day);
      System.out.println(Day);
      }
     sc.close();
     }
    public static int outDay(int year, int month, int day){
     int [] Day={31,28,31,30,31,30,31,31,30,31,30,31};
     if(year<0||month>12||month<0||day<0||day>31)
      return -1;
     if(year%4==0&&year%100!=0||year%400==0)
     {
      Day[1]=29;
     }
     int sum=0;
     for(int i=0;i<month-1;i++)
     {
      sum+=Day[i];
     }
     return sum+day;
    }
    }