How to get ISO format from time in milliseconds in Java?

Question

Is it simple way to get yyyy-MM-dd HH:mm:ss,SSS from time in millisecond? I've found some information how to do this from new Date() or Calendar.getInstance(), but couldn't find if it can be done from long (e.g. 1344855183166)

Answer 1

I thought you had asked how to get the time in this format "yyyy-MM-dd HH:mm:ss,SSS"

One way is to use java's SimpleDateFormat: http://docs.oracle.com/javase/6/docs/api/java/text/SimpleDateFormat.html

NOTE that this is not thread-safe.

...

Date d = new Date(1344855183166L);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS");
String dateStr = sdf.format(d);

...

Answer 2

If you have epoch millis. The below line should work,

Instant.ofEpochMilli(millis).toString()