java - Milliseconds and nanoseconds in time format

Question

This is my code:

long currentTime = System.currentTimeMillis();
Date date = new Date(currentTime); // if you really have long
String result = new SimpleDateFormat("HH:mm:ss").format(date.getTime());

Is it possible to add milliseconds and nanoseconds to the date format ?

Answer 1

You can add milliseconds by adding SSS at the end, such as the format will be HH:mm:ss.SSS.

There is no reference in the SimpleDateFormat to nanoseconds. Usually System.nanoTime() is used for performance debugging and not for display purposes.