The toInstant() method of a ChronoZonedDateTime class is used to convert this ChronoZonedDateTime to the Instant.
Syntax:
default Instant toInstant()
Parameters: This method do not accepts any parameter.
Return value: This method returns Instant which is the same Instant represented by this ChronoZonedDateTime.
Below programs illustrate the toInstant() method:
Program 1:
// Java program to demonstrate// ChronoZonedDateTime.toInstant() method  import java.time.*;import java.time.chrono.*;import java.time.chrono.*;  public class GFG {    public static void main(String[] args)    {          // create ChronoZonedDateTime object        ChronoZonedDateTime time            = ZonedDateTime                  .parse(                      "2018-12-06T19:21:12.123+05:30[Asia/Calcutta]");          // print ChronoZonedDateTime        System.out.println("ChronoZonedDateTime: "                           + time);          // print result        System.out.println("Instant: "                           + time.toInstant());    }} |
Output:
ChronoZonedDateTime: 2018-12-06T19:21:12.123+05:30[Asia/Calcutta] Instant: 2018-12-06T13:51:12.123Z
Program 2:
// Java program to demonstrate// ChronoZonedDateTime.toInstant() method  import java.time.*;import java.time.chrono.*;import java.time.chrono.*;  public class GFG {    public static void main(String[] args)    {          // create ChronoZonedDateTime object        ChronoZonedDateTime time            = ZonedDateTime.parse(                "1918-10-25T23:12:38.543+02:00[Europe/Paris]");          // print ChronoZonedDateTime        System.out.println("ChronoZonedDateTime: "                           + time);          // print result        System.out.println("Instant: "                           + time.toInstant());    }} |
Output:
ChronoZonedDateTime: 1918-10-25T23:12:38.543Z[Europe/Paris] Instant: 1918-10-25T23:12:38.543Z
Reference: https://docs.oracle.com/javase/9/docs/api/java/time/chrono/ChronoZonedDateTime.html#toInstant–
