Question

I have time data split in two strings – one string for date, and one for time.
I want to calculate the diff. of such two times in Java.
e.g.

• time 1:”26/02/2011″ and “11:00 AM”
• time 2:”27/02/2011″ and “12:15 AM”

Difference would be like 13 hours 15 minutes.

Answer 1

String str_date1 = "26/02/2011";
String str_time1 = "11:00 AM";

String str_date2 = "27/02/2011";
String str_time2 = "12:15 AM" ;

DateFormat formatter = new SimpleDateFormat("dd/MM/yyyy hh:mm a");
Date date1 = formatter.parse(str_date1 + " " + str_time1);
Date date2 = formatter.parse(str_date2 + " " + str_time2);

// Get msec from each, and subtract.
long diff = date2.getTime() - date1.getTime();

System.out.println("Difference In Days: " + (diff / (1000 * 60 * 60 * 24)));

Obs: This is only valid as an aproximation. See Losing Time on the Garden Path.)