I want to calculate the difference between two date/time in java using Date and Calendar classes. The format that I have is "2012-01-24 12:30:00 PM".
I have implemented my own method and also google it to work with others, but haven't getting the right hint to handle AM and PM values.
The date/time difference got troubled whenever the time have 12(AM/PM) in it. For example if I have date/time "2012-01-24 12:30:00 PM" and "2012-01-24 02:30:00 PM" it shows the difference is 10 hours.
Considering the code on this link how can it be modified to handle AM and PM.
To convert String date into Date I use following code:
String sessionTimeStart = "2012-01-24 12:30:00 PM";
String sessionTimerEndOrCurrent = "2012-01-24 02:30:00 PM";
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss a");
Date d1 = null;
Date d0 = null;
try {
d1 = format.parse(sessionTimeStart);
d0 = format.parse(sessionTimerEndOrCurrent);
} catch (ParseException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
The problem is your date format: instead of yyyy-MM-dd HH:mm:ss a use yyyy-MM-dd hh:mm:ss a.
HH will be the hour in day (0-23) whereas hh will be the hour in AM/PM (1-12). Thus with your date format 02:30:00 will be parsed as just that instead of being converted to the PM version (which in hour of day would be 14:30:00).