[java] Difference in days between two dates in Java?

If you're looking for a solution that returns proper number or days between e.g. 11/30/2014 23:59 and 12/01/2014 00:01 here's solution using Joda Time.

private int getDayDifference(long past, long current) {
    DateTime currentDate = new DateTime(current);
    DateTime pastDate = new DateTime(past);
    return currentDate.getDayOfYear() - pastDate.getDayOfYear();
} 

This implementation will return 1 as a difference in days. Most of the solutions posted here calculate difference in milliseconds between two dates. It means that 0 would be returned because there's only 2 minutes difference between these two dates.

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