date difference question

When i run this code

System.out.println(pay.getDate());

i get back a dates in this format

Thu Jan 12 00:00:00 GMT 2012
Sat Nov 10 00:00:00 GMT 2012
Mon Dec 12 00:00:00 GMT 2011

How do i convert these dates so that i can use the following code

Code:

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Calendar ca1 = Calendar.getInstance();
        Calendar ca2 = Calendar.getInstance();

        // Set the date for both of the calendar to get difference
        ca1.set(2008, 07, 27);
        ca2.set(2009, 05, 15);

        // Get date in milliseconds
        long milisecond1 = ca1.getTimeInMillis();
        long milisecond2 = ca2.getTimeInMillis();

        // Find date difference in milliseconds
        long diffInMSec = milisecond2 - milisecond1;

        // Find date difference in days
        // (24 hours 60 minutes 60 seconds 1000 millisecond)
        long diffOfDays = diffInMSec / (24 * 60 * 60 * 1000);

        System.out.println("Date Difference in : " + diffOfDays + " days.");

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Also how can i use the current date for ca2.set(2009, 05, 15);

What does getDate() return?

returns a date in this format

Thu Jan 12 00:00:00 GMT 2012
Sat Nov 10 00:00:00 GMT 2012
Mon Dec 12 00:00:00 GMT 2011

Assuming you mean a Date object, then that has no format.
If it is a Date then look at the Calendar API for a suitable method.