time - How can I find the amount of seconds passed from the midnight with Java?

Question

I need a function that gives me how many seconds passed from the midnight. I am currently using System.currentTimeMillis() but it gives me the UNIX like timestamp.

It would be a bonus for me if I could get the milliseconds too.

Answer 1

If you're using Java >= 8, this is easily done :

ZonedDateTime nowZoned = ZonedDateTime.now();
Instant midnight = nowZoned.toLocalDate().atStartOfDay(nowZoned.getZone()).toInstant();
Duration duration = Duration.between(midnight, Instant.now());
long seconds = duration.getSeconds();

If you're using Java 7 or less, you have to get the date from midnight via Calendar, and then substract.

Calendar c = Calendar.getInstance();
long now = c.getTimeInMillis();
c.set(Calendar.HOUR_OF_DAY, 0);
c.set(Calendar.MINUTE, 0);
c.set(Calendar.SECOND, 0);
c.set(Calendar.MILLISECOND, 0);
long passed = now - c.getTimeInMillis();
long secondsPassed = passed / 1000;