給指定日期增加天數

public static void main(String[] args) throws java.text.ParseException {
        System.out.println("輸入天數：");
        Scanner scan = new Scanner(System.in);
        int day = scan.nextInt();
        String createDate = "2000-01-01";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd");
        try {
            Date date = sdf.parse(createDate);
            Calendar cl = Calendar.getInstance();
            cl.setTime(date);
            // cl.set(Calendar.DATE, day);
            cl.add(Calendar.DATE, day);
            Date t=cl.getTime();
			//對加上指定天數後的日期進行轉換，會報錯
        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }