How can I convert a time in milliseconds to ZonedDateTime

Question

I have the time in milliseconds and I need to convert it to a ZonedDateTime object.

I have the following code

long m = System.currentTimeMillis();
L         


        

Answer 1

Whether you want a ZonedDateTime, LocalDateTime, OffsetDateTime, or LocalDate, the syntax is really the same, and all revolves around applying the milliseconds to an Instant first using Instant.ofEpochMilli(m).

long m = System.currentTimeMillis();

ZonedDateTime  zdt = ZonedDateTime.ofInstant(Instant.ofEpochMilli(m), ZoneId.systemDefault());
LocalDateTime  ldt = LocalDateTime.ofInstant(Instant.ofEpochMilli(m), ZoneId.systemDefault());
OffsetDateTime odt = OffsetDateTime.ofInstant(Instant.ofEpochMilli(m), ZoneId.systemDefault());
LocalDate      ld  = LocalDate.ofInstant(Instant.ofEpochMilli(m), ZoneId.systemDefault());

Printing them would produce something like this:

2018-08-21T12:47:11.991-04:00[America/New_York]
2018-08-21T12:47:11.991
2018-08-21T12:47:11.991-04:00
2018-08-21

Printing the Instant itself would produce:

2018-08-21T16:47:11.991Z