Calculate difference in days between two dates

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import java.util.Calendar; public class DateDifferenceExample{ public static void main(String[] args){ //get instance of Calendar objects Calendar cal1 = Calendar.getInstance(); Calendar cal2 = Calendar.getInstance(); //set two dates we want to know difference of cal1.set(2006, 12, 30); cal2.set(2007, 5, 3); long milis1 = cal1.getTimeInMillis(); long milis2 = cal2.getTimeInMillis(); //difference in milliseconds long diff = milis2 - milis1; //difference in seconds long diffSeconds = diff / 1000; //difference in minutes long diffMinutes = diff / (60 * 1000); //difference in hours long diffHours = diff / (60 * 60 * 1000); //difference in days long diffDays = diff / (24 * 60 * 60 * 1000); System.out.println("Date difference in milliseconds: " + diff + " milliseconds."); System.out.println("Date difference in seconds: " + diffSeconds + " seconds."); System.out.println("Date difference in minutes: " + diffMinutes + " minutes."); System.out.println("Date difference in hours: " + diffHours + " hours."); System.out.println("Date difference in days: " + diffDays + " days."); } } /* Output of above date difference program would be Date difference in milliseconds: 10713600000 milliseconds. Date difference in seconds: 10713600 seconds. Date difference in minutes: 178560 minutes. Date difference in hours: 2976 hours. Date difference in days: 124 days. */