题解 | #计算日期到天数转换#

import java.text.*;
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        DateFormat dateFormat = new SimpleDateFormat("yyyy MM dd");
        Calendar calendar = Calendar.getInstance();
        while (scanner.hasNextLine()) {
            String date = scanner.nextLine();
            try {
                calendar.setTime(dateFormat.parse(date));
            } catch (ParseException e) {
                e.printStackTrace();
            }
            System.out.println(calendar.get(Calendar.DAY_OF_YEAR));
        }
    }
}