根据日期来求一年中的第几天

 1 package excel;
 2 import java.util.Scanner;
 3 public class code14 {
 4     public static void main (String[]args){
 5         Scanner reader =new Scanner(System.in);
 6         System.out.println("请输入日期：");
 7         String  date=reader.next();
 8         String []inPut=date.split("_");
 9 
10         int years= Integer.parseInt(inPut[0]);
11         int monuth=Integer.parseInt(inPut[1]);
12         int date1=Integer.parseInt(inPut[2]);
13         int []amount={31,28,31,30,31,30,31,30,31,30,31,30};
14         if (years % 400 == 0 || (years % 4 == 0 && years % 100 != 0));{
15             amount[1]+=1;
16         }
17         int days=0;
18         for (int i =0;i<=monuth-1;i++){
19              days += amount[i];
20         }
21         System.out.println("这是这一年的第"+(days+date1)+"天");
22 
23 
24     }
25 }