Get Epoch Seconds from Instant in Java

Create an Instant and get an Instant using milliseconds passed as parameter from the epoch of 1970-01- 01T00:00:00Z. This is done using ofEpochMilli():

Instant instant = Instant.ofEpochMilli(342627282920l);

Now, get the Epoch seconds from Instant:

instant.getEpochSecond();

Example

import java.time.Instant;
public class Demo {
   public static void main(String[] args) {
      Instant instant = Instant.ofEpochMilli(342627282920l);
      long res = instant.getEpochSecond();
      System.out.println(res);
   }
}

Output

342627282