西瓜是肥貓

// date format

SimpleDateFormat convert=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

String now = convert.format(Calendar.getInstance().getTime());

Date date=convert.parse(now);

//compareto two date

// create two dates

            Date date = new Date(99,4,24);

            Date date2 = new Date(102,2,13);

//three condition

             int comparison = date.compareTo(date2); // = -1

            int comparison2 = date2.compareTo(date);// =1

            int comparison3 = date.compareTo(date); //= 0