Instant getEpochSecond() method in Java with Examples

The getEpochSecond() method of Instant class is used to return the number of seconds from the Java epoch of 1970-01-01T00:00:00Z. It means the difference between time in seconds of this instance and time represented by “1970-01-01T00:00:00Z” is returned by this method. The epoch second count is a simple incrementing count of seconds where the second 0 is 1970-01-01T00:00:00Z.

Syntax:

public long getEpochSecond()

Returns: This method returns the seconds from the epoch of 1970-01-01T00:00:00Z.

Below programs illustrate the Instant.getEpochSecond() method:

Program 1:

// Java program to demonstrate
// Instant.getEpochSecond() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create  instance object
        Instant instant
            = Instant.parse("2018-10-20T16:55:30.00Z");

        // print Instant Value
        System.out.println("Instant: " + instant);

        // get epochValue using getEpochSecond
        long epochValue = instant.getEpochSecond();

        // print results
        System.out.println("Java epoch Value: "
                           + epochValue);
    }
}

Output:

Instant: 2018-10-20T16:55:30Z
Java epoch Value: 1540054530

Program 2:

// Java program to demonstrate
// Instant.getEpochSecond() method

import java.time.*;

public class GFG {
    public static void main(String[] args)
    {

        // create current instance object
        Instant instant
            = Instant.now();

        // print Instant Value
        System.out.println("Current Instant: "
                           + instant);

        // get epochValue using getEpochSecond
        long epochValue = instant.getEpochSecond();

        // print results
        System.out.println("Java epoch Value: "
                           + epochValue);
    }
}

Output:

Current Instant: 2018-11-22T08:26:19.502Z
Java epoch Value: 1542875179

Reference: https://docs.oracle.com/javase/10/docs/api/java/time/Instant.html#getEpochSecond()