Calculate the difference in days between two dates.

package one;

import java.util.*;

public class Difference {

public static void main(String[] args)

{

Calendar cal1 = Calendar.getInstance();

Calendar cal2 = Calendar.getInstance();

cal1.set(2006, 12, 30);

cal2.set(2007, 5, 3);

long milis1 = cal1.getTimeInMillis();

long milis2 = cal2.getTimeInMillis();

long diff = milis2 - milis1;

long diffDays = diff / (24 * 60 * 60 * 1000);

System.out.println("Date difference in days: " + diffDays + " days.");

}

}