Instant ofEpochMilli() method in Java with Examples

The ofEpochMilli() method of Instant class helps to get an Instant using milliseconds passed as parameter from the epoch of 1970-01-01T00:00:00Z. This returned milliseconds is used to get the different time units like seconds, etc by conversion.

Syntax:

public static Instant 
    ofEpochMilli(long epochMilli)

Parameters: This method accepts one parameter epochMilli is value of milliseconds from 1970-01-01T00:00:00Z.

Returns: This method returns Instant as the time from the Epoch as milliseconds.

Exception: This method throws DateTimeException if the result exceeds the maximum or minimum instant.

Below programs illustrate the ofEpochMilli() method:

Program 1:

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

import java.time.*;

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

        // create a long variable for milliseconds
        long milliseconds
            = 999999000;

        // get Instant using ofEpochMilli() method
        Instant instant
            = Instant.ofEpochMilli(milliseconds);

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

Output:

Instant: 1970-01-12T13:46:39Z

Program 2:

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

import java.time.*;

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

        // get Instant using ofEpochMilli() method
        // passed epoch millisecond is 73264271044L
        Instant instant
            = Instant.ofEpochMilli(73264271044L);

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

Output:

Instant: 1972-04-27T23:11:11.044Z

References: https://docs.oracle.com/javase/10/docs/api/java/time/Instant.html#ofEpochMilli(long)