Time difference

TimeDifference.java

boolean isValid(Date date1, Date date2) {
    Timestamp timestamp1 = new Timestamp(date1.getTime());
    Timestamp timestamp2 = new Timestamp(date2.getTime());

    long milliseconds = timestamp2.getTime() - timestamp1.getTime();
    int seconds = (int) milliseconds / 1000;

    int hours = seconds / 3600;
    int minutes = (seconds % 3600) / 60;
    seconds = (seconds % 3600) % 60;

    System.out.println("timestamp1: " + timestamp1);
    System.out.println("timestamp2: " + timestamp2);

    System.out.println("Difference: ");
    System.out.println(" Hours: " + hours);
    System.out.println(" Minutes: " + minutes);
    System.out.println(" Seconds: " + seconds);

    return hours < 24;
}