Main.java Source code

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import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class Main {
    public static void main(String args[]) {
        Calendar c1 = new GregorianCalendar();
        Calendar c2 = new GregorianCalendar();
        c1.set(2000, 12, 12, 0, 0, 0);
        c2.set(2001, 12, 12, 0, 0, 0);

        System.out.println(daysBetween(c1.getTime(), c2.getTime()) + " day(s) between " + args[0] + "-" + args[1]
                + "-" + args[2] + " and " + args[3] + "-" + args[4] + "-" + args[5]);
    }

    static final long ONE_HOUR = 60 * 60 * 1000L;

    public static long daysBetween(Date d1, Date d2) {
        return ((d2.getTime() - d1.getTime() + ONE_HOUR) / (ONE_HOUR * 24));
    }
}