第12次作业--你的生日

题目：利用Calendar类计算自己的出生日期距今天多少天，再将自己的出生日期利用SimpleDateFormat类设定的格式输出显示。

代码：

package factorial;
import java.text.SimpleDateFormat;
import java.util.*;
public class Birthday {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        Calendar calendar = Calendar.getInstance();
        System.out.println("请输入你的生日：");
        String birthdaytime = input.nextLine();
        StringTokenizer time  = new StringTokenizer(birthdaytime," ,.-");  //以 ，.-分割做拆分
        String stringyear = null,stringmonth = null,stringday = null;
        //拆分
        while(time.hasMoreTokens()) {
            int count = time.countTokens();
            if(count == 3)
                stringyear = time.nextToken();
            else if(count == 2)
                stringmonth = time.nextToken();
            else if(count == 1)
                stringday = time.nextToken();
        }
        //字符串转化数字
        int year = Integer.parseInt(stringyear);
        int month = Integer.parseInt(stringmonth);
        int day = Integer.parseInt(stringday);
        
        //Calendar类
        calendar.set(year, month - 1, day);   
        SimpleDateFormat birthday = new SimpleDateFormat("YYYY年MM月dd日");
        System.out.println(birthday.format(calendar.getTimeInMillis()));
        //Date类
        Date nowTime = new Date();
        System.out.println("您出生了" + (nowTime.getTime() - calendar.getTimeInMillis())/1000/60/60/24 + "天");
    }

}

结果：

多种格式输入：