How to convert Milliseconds to “X mins, x seconds” in Java?

Question

I want to record the time using System.currentTimeMillis() when a user begins something in my program. When he finishes, I will subtract the current Syste

Answer 1

long time = 1536259;

return (new SimpleDateFormat("mm:ss:SSS")).format(new Date(time));

Prints:

25:36:259