第几天 （Java代码）

解题思路:

注意事项:导包

import java.util.Calendar;

import java.util.GregorianCalendar;

参考代码:

public class 第几天 {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner in = new Scanner(System.in);

while(in.hasNext()) {

String date = in.next();

int year = Integer.valueOf(date.substring(0, 4));

int month;

int day;

if(date.charAt(6)=='/') {

month = Integer.valueOf(date.charAt(5))-1;

day = Integer.valueOf(date.substring(7));

}

else {

month = Integer.valueOf(date.substring(5,7))-1;

day = Integer.valueOf(date.substring(8));

}

Calendar cal = new GregorianCalendar(year, month, day);

System.out.println(cal.get(Calendar.DAY_OF_YEAR));

}

}

}