convert epoch time to date

Question

I ve tried a million different ways of doing this  but with no avail  Any help would be much appreciated    long millis   getMillisFromServer    Date date   new Date millis   DateFormat format   new SimpleDateFormat  dd MM yyyy HH mm ss    format setTimeZone TimeZone getTimeZone  Australia Sydney     String formatted   format format date     The above doesn t work   basically  what I want to do is  get the epoch time and convert it to Australian time  My local time is  05 30 but of course I don t want this to be a factor which contributes to this conversion    EDIT-   Output when I run your exact code   epoch 1318388699000  Wed Oct 12 08 34 59 GMT 05 30 2011  12 10 2011 03 04 59   12 10 2011 14 04 59

User · Answer

Here   s the modern answer  valid from 2014 and on   The accepted answer was a very fine answer in 2011  These days I recommend no one uses the Date  DateFormat and SimpleDateFormat classes  It all goes more natural with the modern Java date and time API   To get a date-time object from your millis       ZonedDateTime dateTime   Instant ofEpochMilli millis               atZone ZoneId of  Australia Sydney       If millis equals 1318388699000L  this gives you 2011-10-12T14 04 59 11 00 Australia Sydney   Should the code in some strange way end up on a JVM that doesn   t know Australia Sydney time zone  you can be sure to be notified through an exception   If you want the date-time in your string format for presentation   String formatted   dateTime format DateTimeFormatter ofPattern  dd MM yyyy HH mm ss       Result   12 10 2011 14 04 59   PS I don   t know what you mean by    The above doesn t work     On my computer your code in the question too prints 12 10 2011 14 04 59

User · Answer

EDIT  Okay  so you don t want your local time  which isn t Australia  to contribute to the result  but instead the Australian time zone  Your existing code should be absolutely fine then  although Sydney is currently UTC 11  not UTC 10   Short but complete test app   import java util    import java text     public class Test       public static void main String   args  throws InterruptedException           Date date   new Date 1318386508000L           DateFormat format   new SimpleDateFormat  dd MM yyyy HH mm ss            format setTimeZone TimeZone getTimeZone  Etc UTC             String formatted   format format date           System out println formatted           format setTimeZone TimeZone getTimeZone  Australia Sydney             formatted   format format date           System out println formatted             Output   12 10 2011 02 28 28 12 10 2011 13 28 28   I would also suggest you start using Joda Time which is simply a much nicer date time API     EDIT  Note that if your system doesn t know about the Australia Sydney time zone  it would show UTC  For example  if I change the code about to use TimeZone getTimeZone  blah blah   it will show the UTC value twice  I suggest you print TimeZone getTimeZone  Australia Sydney   getDisplayName   and see what it says    and check your code for typos too

User · Answer

Please take care that the epoch time is in second and Date object accepts Long value which is in milliseconds  Hence you would have to multiply epoch value with 1000 to use it as long value   Like below  -  SimpleDateFormat sdf   new SimpleDateFormat  yyyyMMddhhmmss    sdf setTimeZone TimeZone getTimeZone timeZone    Long dateLong Long parseLong sdf format epoch 1000

[java] convert epoch time to date

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