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) {
// create objects of Time class
Time start = new Time(8, 12, 15);
Time stop = new Time(12, 34, 55);
Time diff;
// call difference method
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 start second is greater
// convert minute of stop into seconds
// and add seconds to stop second
if(start.seconds > stop.seconds){
--stop.minutes;
stop.seconds += 60;
}
diff.seconds = stop.seconds - start.seconds;
// if start minute is greater
// convert stop hour into minutes
// and add minutes to stop minutes
if(start.minutes > stop.minutes){
--stop.hours;
stop.minutes += 60;
}
diff.minutes = stop.minutes - start.minutes;
diff.hours = stop.hours - start.hours;
// return the difference time
return(diff);
}
}
Output
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 the 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, find the difference and returns it as Time
class.
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