long timestamp to LocalDateTime

Question

I have a long timestamp 1499070300 (equivalent to Mon, 03 Jul 2017 16:25:00 +0800) but when I convert it to LocalDateTime I get 1970-01-18T16:24:30.300

Here's my code

long test_timestamp = 1499070300;

LocalDateTime triggerTime =
                LocalDateTime.ofInstant(Instant.ofEpochMilli(test_timestamp), TimeZone
                        .getDefault().toZoneId());

Solution 1

You need to pass timestamp in milliseconds:

long test_timestamp = 1499070300000L;
LocalDateTime triggerTime =
        LocalDateTime.ofInstant(Instant.ofEpochMilli(test_timestamp), 
                                TimeZone.getDefault().toZoneId());  

System.out.println(triggerTime);

Result:

2017-07-03T10:25

Or use ofEpochSecond instead:

long test_timestamp = 1499070300L;
LocalDateTime triggerTime =
       LocalDateTime.ofInstant(Instant.ofEpochSecond(test_timestamp),
                               TimeZone.getDefault().toZoneId());   

System.out.println(triggerTime);

Result:

2017-07-03T10:25

Solution 2

Try with the following..

long test_timestamp = 1499070300000L;
    LocalDateTime triggerTime =
            LocalDateTime.ofInstant(Instant.ofEpochMilli(test_timestamp), TimeZone
                    .getDefault().toZoneId());  

By default 1499070300000 is int if it dosen't contain l in end.Also pass time in milliseconds.

Solution 3

If you are using the Android threeten back port then the line you want is this

LocalDateTime.ofInstant(Instant.ofEpochMilli(startTime), ZoneId.systemDefault())

Solution 4

Try with Instant.ofEpochMilli() or Instant.ofEpochSecond() method with it-

long test_timestamp = 1499070300L;
LocalDateTime date =
    LocalDateTime.ofInstant(Instant.ofEpochMilli(test_timestamp ), TimeZone
        .getDefault().toZoneId());

Solution 5

Your issue is that the timestamp is not in milliseconds but expressed in seconds from the Epoch date. Either multiply by 1000 your timestamp or use the Instant.ofEpochSecond().

View more solutions

Comments

[Akshay]

long test_timestamp = 1499070300l;??

[JodaStephen]

Use ZoneId.systemDefault() instead of TimeZone.getDefault().toZoneId()

[Ole V.V.]

You’re not the first to ask a about a bug like this one. For example: SimpleDateFormat always returns 1970.01.17 with wrong timezone.

[Basil Bourque]

Similar: Converting 19-digit Unix Timestamp to a Readable Date

[Andy Turner]

You mean "Try with Instant.ofEpochSecond()", right? Otherwise your text is confusing.

[rhandom]

Thanks. I missed that

[Louis Tsai]

BTW if you are using AndroidThreeTen, replace TimeZone.getDefault().toZoneId() with DateTimeUtils.toZoneId(TimeZone.getDefault()).