Duration toMillis() method in Java with Examples

The toMillis() method of Duration Class in java.time package is used get the value of this duration in number of milli-seconds.

Syntax:

public long toMillis()

Parameters: This method do not accepts any parameter.

Return Value: This method returns a long value which is the number of milli-seconds in this duration.

Below examples illustrate the Duration.toMillis() method:

Example 1:

// Java code to illustrate toMillis() method

import java.time.Duration;

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

        // Duration using parse() method
        Duration duration
            = Duration.parse("P2DT3H4M");

        System.out.println("Duration: "
                           + duration);

        // Get the number of milli-seconds
        // using toMillis() method
        System.out.println(duration.toMillis());
    }
}

Output:

Duration: PT51H4M
183840000

Example 2:

// Java code to illustrate toMillis() method

import java.time.Duration;

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

        // Duration using ofMillis() method
        Duration duration
            = Duration.ofMillis(10);

        System.out.println("Duration: "
                           + duration);

        // Get the number of milli-seconds
        // using toMillis() method
        System.out.println(duration.toMillis());
    }
}

Output:

Duration: PT0.01S
10

Reference: https://docs.oracle.com/javase/9/docs/api/java/time/Duration.html#toMillis–