SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date date = df.parse(Console.readString("请输入个给定日期,日期格式:yyyy-MM-dd"));
int num = Console.readInt("给定的日期");
System.out.println(df.format(new Date(date.getTime()+num*24*60*60*1000)));
System.out.println(date.getTime());