Date difference in Java

Question

Hi everyone,
I have 2 strings which are in "MM/dd/yyyy" format. I need to find the difference in number of days between 2 strings. Can anyone let me know how to do it.
What I am doing right now on JSP page is(I am already importing java.util.*, java.text.* on the page):
String strDate1 = "03/05/2002";
String strDate2 = "06/02/2003";
Date date1 = DateFormat.parse(strDate1);
Date date2 = DateFormat.parse(strDate2);
Calendar cal1 = Calendar.getInstance();
Calendar cal2 = Calendar.getInstance();
cal1.setTime(date1);
cal2.setTime(date2);
long time = cal2.getTimeInMillis()- cal1.getTimeInMillis();
long days = (time/1000*60*60*24);
out.print(days);
Please let me know whaz wrong or what may be the better method.
Thanks

Answer 1

Sorry, I made a mistake. cal1.getTime() should be replaced with date1.getTime().
Another mistake that we both did is:
long days1 = (time1/1000*60*60*24);while it should be:
long days1 = time1/(1000*60*60*24);Did you notice the difference in the brackets position?
Here is a snap of the code that I wrote and test it myself:
long time1 = date1.getTime() + calendar1.get(Calendar.ZONE_OFFSET) + calendar1.get(Calendar.DST_OFFSET);
long time2 = date2.getTime() + calendar2.get(Calendar.ZONE_OFFSET) + calendar2.get(Calendar.DST_OFFSET);
long days1 = time1/(1000*60*60*24);
long days2 = time2/(1000*60*60*24);
long days = days2 - days1;Good luck.