Getting unix timestamp from Date

Question

I can convert a unix timestamp to a Date   object by putting the long value into the Date   constructor  For eg  I could have it as new Date 1318762128031     But after that  how can I get back the unix timestamp from the Date   object

User · Answer

I dont know if you want to achieve that in js or java  in js the simplest way to get the unix timestampt  this is time in seconds from 1 1 1970  it s as follows   var myDate   new Date    console log  myDate       myDateObject give you the unix from that date

User · Answer

getTime   retrieves the milliseconds since Jan 1  1970 GMT passed to the constructor  It should not be too hard to get the Unix time  same  but in seconds  from that

User · Answer

In java 8  it s convenient to use the new date lib and getEpochSecond method to get the timestamp  it s in second    Instant now   getEpochSecond

User · Answer

import java text DateFormat  import java text ParseException  import java text SimpleDateFormat  import java util TimeZone   public class Timeconversion       private DateFormat dateFormat   new SimpleDateFormat  yyyyMMddHHmm   Locale ENGLISH     Specify your locale      public long timeConversion String time            long unixTime   0          dateFormat setTimeZone TimeZone getTimeZone  GMT 5 30       Specify your timezone         try               unixTime   dateFormat parse time  getTime                unixTime   unixTime   1000            catch  ParseException e                e printStackTrace                      return unixTime

User · Answer

To get a timestamp from Date     you ll need to divide getTime   by 1000  i e     Date currentDate   new Date    currentDate getTime     1000     1397132691   or simply   long unixTime   System currentTimeMillis     1000L

User · Answer

Use SimpleDateFormat class  Take a look on its javadoc  it explains how to use format switches

[java] Getting unix timestamp from Date()

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