public class Test2{

public long getTwoDay(Date begin_date, Date end_date) {long day = 0;try {SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");String sdate = format.format(Calendar.getInstance().getTime());if (begin_date == null) {begin_date = format.parse(sdate);}if (end_date == null) {end_date = format.parse(sdate);}day = (end_date.getTime() - begin_date.getTime())/ (24 * 60 * 60 * 1000);} catch (Exception e) {return -1;}return day;}

public static void main(String[]args){Test2 t=new Test2(); try { Date date1 = new SimpleDateFormat("yyyy-mm-dd").parse("2006-06-08"); Date date2 = new SimpleDateFormat("yyyy-mm-dd").parse("2006-06-12"); long day= t.getTwoDay(date1, date2); System.out.PRintln(day);} catch (ParseException e) {e.printStackTrace();}}}