Difference in days between two dates in Java?

Question

I need to find the number of days between two dates: one is from a report and one is the current date. My snippet:

  int age=calculateDiffer         


        

Answer 1

Solution using difference between milliseconds time, with correct rounding for DST dates:

public static long daysDiff(Date from, Date to) {
    return daysDiff(from.getTime(), to.getTime());
}

public static long daysDiff(long from, long to) {
    return Math.round( (to - from) / 86400000D ); // 1000 * 60 * 60 * 24
}

One note: Of course, dates must be in some timezone.

The important code:

Math.round( (to - from) / 86400000D )

If you don't want round, you can use UTC dates,