Number of days between two dates in Java

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update (23.1.2007): please don't use the code below. You should use this library instead. It's not perfect as the API is ... well Javaish, but it works fine and has a simple class for the task that I was trying to accomplish below.
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Java has no (as far as I know) TimeSpan class, so you have to calculate this on your own.
Now the first thought would be to do something like: date1.getTime - date2.getTime / milliseconds in a day.
But this returns wrong results as there are some rounding issues.
The correct way to get number of days between two days is this:

Calendar endDate = Calendar.getInstance();
endDate.setTime ( SET_YOUR_TIME_HERE );
Calendar startDate = Calendar.getInstance();
startDate.setTime ( SET_YOUR_TIME_HERE );

int days = endDate .get(Calendar.DAY_OF_YEAR) - startDate .get(Calendar.DAY_OF_YEAR);