Question

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How can I calculate a time span in Java and format the output?

How to subtract two time by converting them to get long and convert it back to time again?

I tried subtracting two time by converting them to long.

    Long timeSpan = Long.valueOf(timespan.getValue().toString()) * 60;
    Long checkVar = (date.getTime() - testStartTime.getTime()) / 1000;

Now how do i convert the resultant long into time?

That is if the result long is say 30 min i want it to be shown 00:30:00 .

How can i do this?

Thanks in advance

Answer 1

It’s trivial to convert your time in seconds into the individual HH:MM:SS components:

int h = checkVar / 3600;
int m = (checkVar / 60) % 60;
int s = (checkVar % 60);

String time = String.format("%02d:%02d:%02d", h, m, s);