学Java好难啊！

public static void main(String[] args) throws ParseException {String time1 = "2005-07-05";//用户输入时间String time2 = "2009-01-01";//格式化时间标准SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd");SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd");Date d1=sdf1.parse(time1);////parse（）方法，用于将字符串类型转化为Date类型Date d2=sdf2.parse(time2);long d3=d1.getTime();long d4=d2.getTime();long d5=d4-d3;int i=(int)(d5/(24*60*60*1000));System.out.println(i);}