Java Convert a Unix Timestamp to Date Time

Write program that converts a UNIX timestamp to a java.util.Date and java.time.LocalDateTime.
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Java Convert a Unix Timestamp to Date-Time

package net.sourcecodeexamples.java; import java.text.ParseException; import java.time.Instant; import java.time.LocalDateTime; import java.time.ZoneId; import java.time.ZonedDateTime; import java.time.format.DateTimeFormatter; import java.util.Date; import java.util.concurrent.TimeUnit; public class Main { public static void main(String[] args) throws ParseException { long unixTimestamp = System.currentTimeMillis(); Date date1 = new Date(unixTimestamp * 1000 L); Date date2 = new Date(TimeUnit.MILLISECONDS.convert(unixTimestamp, TimeUnit.SECONDS)); System.out.println(unixTimestamp + " as date-time in default time zone is " + date1); System.out.println(unixTimestamp + " as date-time in default time zone is " + date2); // JDK 8  Instant instant = Instant.ofEpochSecond(unixTimestamp); Date date3 = Date.from(instant); LocalDateTime date4 = LocalDateTime.ofInstant(instant, ZoneId.of("Asia/Calcutta")); ZonedDateTime date5 = ZonedDateTime.ofInstant(instant, ZoneId.of("Asia/Calcutta")); System.out.println(unixTimestamp + " as date-time in default time zone is " + date3); System.out.println("\n" + unixTimestamp + " as date-time in Asia/Calcutta time zone is " + date4); System.out.println(unixTimestamp + " as date-time in Asia/Calcutta time zone is " + date5.format(DateTimeFormatter.ofPattern("yyyy-MMM-dd HH:mm:ss Z VV"))); System.out.println("\n" + unixTimestamp + " as instant (UTC time) is " + instant); } }

Output

1597138527667 as date-time in default time zone is Sat Apr 21 20:31:07 IST 52581 1597138527667 as date-time in default time zone is Sat Apr 21 20:31:07 IST 52581 1597138527667 as date-time in default time zone is Sat Apr 21 20:31:07 IST 52581 1597138527667 as date-time in Asia/Calcutta time zone is +52581-04-21T20:31:07 1597138527667 as date-time in Asia/Calcutta time zone is +52581-Apr-21 20:31:07 +0530 Asia/Calcutta 1597138527667 as instant (UTC time) is +52581-04-21T15:01:07Z

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