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How to get Time in Milliseconds for the Given date and time in Java?
The java.text.SimpleDateFormat class is used to format and parse a string to date and date to string.
- One of the constructors of this class accepts a String value representing the desired date format and creates SimpleDateFormat object.
- To parse/convert a string as a Date object Instantiate this class by passing desired format string.
- Parse the date string using the parse() method.
- You can get the epoch time using the getTime() method.
Example
import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Date; public class Sample { public static void main(String args[]) throws ParseException { //Instantiating the SimpleDateFormat class SimpleDateFormat dateformatter = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss"); //Parsing the given String to Date object String str = "25-08-2009 11:20:45"; Date date = dateformatter.parse(str); long msec = date.getTime(); System.out.println("Epoch of the given date: "+msec); } }
Output
Epoch of the given date: 1251179445000
You can set date and time values to a calendar object using the set() method. The getTimeInMillis() of this class returns the epoch time of the date value.
Example
import java.util.Calendar; public class Sample { public static void main(String args[]) { Calendar cal = Calendar.getInstance(); cal.set(2014, 9, 11, 10, 25, 30); long msec = cal.getTimeInMillis(); System.out.print(msec); } }
Output
1413003330758
You can set date and time values to a ZonedDateTime object using the of() method. The toEpochMilli() of the Instant class returns the epoch time of the date value.
Example
import java.time.Instant; import java.time.ZoneId; import java.time.ZonedDateTime; public class Sample { public static void main(String args[]){ //Creating the ZonedDateTime object ZoneId id = ZoneId.of("Asia/Kolkata"); ZonedDateTime obj = ZonedDateTime.of(2014, 9, 11, 10, 25, 30, 22, id); Instant instant = obj.toInstant(); long msec = instant.toEpochMilli(); System.out.println("Milli Seconds: "+msec); } }
Output
Milli Seconds: 1410411330000
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