Java Program to Calculate Difference Between Two Time Periods

In this program, you'll learn to calculate the difference between two time periods in Java.

Example: Calculate Difference Between Two Time Periods

public class Time {

    int seconds;
    int minutes;
    int hours;

    public Time(int hours, int minutes, int seconds) {
        this.hours = hours;
        this.minutes = minutes;
        this.seconds = seconds;
    }

    public static void main(String[] args) {
        Time start = new Time(12, 34, 55),
                stop = new Time(8, 12, 15),
                diff;

        diff = difference(start, stop);

        System.out.printf("TIME DIFFERENCE: %d:%d:%d - ", start.hours, start.minutes, start.seconds);
        System.out.printf("%d:%d:%d ", stop.hours, stop.minutes, stop.seconds);
        System.out.printf("= %d:%d:%d\n", diff.hours, diff.minutes, diff.seconds);
    }

    public static Time difference(Time start, Time stop)
    {
        Time diff = new Time(0, 0, 0);

        if(stop.seconds > start.seconds){
            --start.minutes;
            start.seconds += 60;
        }

        diff.seconds = start.seconds - stop.seconds;
        if(stop.minutes > start.minutes){
            --start.hours;
            start.minutes += 60;
        }

        diff.minutes = start.minutes - stop.minutes;
        diff.hours = start.hours - stop.hours;

        return(diff);
    }
}

When you run the program, the output will be:

TIME DIFFERENCE: 12:34:55 - 8:12:15 = 4:22:40

In the above program, we've created a class named Time with three member variables: hours, minutes and seconds. As name suggests, they store hours, minutes and seconds of a given time respectively.

The Time class has a constructor that initializes the value of hours, minutes and seconds.

We've also created a static function difference that takes two Time variables as parameters, finds the difference and returns it as Time class.