long timestamp to LocalDateTime

JavaJava 8TimestampJava Time

Java Problem Overview

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());

Java Solutions

Solution 1 - Java

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 - Java

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 - Java

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 - Java

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 - Java

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().

Solution 6 - Java

SIMPLE and straight forward solution will (KOTLIN)

            val timeStamp:Long=559585985988
            val sdf = SimpleDateFormat("hh:mm:ss a - MMM dd,yyyy", Locale.getDefault())
            val tz = TimeZone.getDefault()
            val now = Date()
            val offsetFromUtc = tz.getOffset(now.time)
            val localeTimeStr = sdf.format(timeStamp + offsetFromUtc) //add the offset to get the local time from the epoch timestamp
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