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Java Duration Class | from() Method with Example

Duration Class from() method: Here, we are going to learn about the from() method of Duration Class with its syntax and example.
Submitted by Preeti Jain, on May 14, 2020

Duration Class from() method

• from() method is available in java.time package.
• from() method is used to return a copy of this Duration from the given TemporalAmount.
• from() method is a static method, it is accessible with the class name and if we try to access the method with the class object then we will not get an error.
• from() method may throw an exception at the time of returning Duration from the given amount.
  • DateTimeException: This exception may throw when the given amt couldn't convert into a Duration.
  • ArithmeticException: This exception may throw when the calculated exceeds the limit.

Syntax:

    public static Duration from(TemporalAmount amt);

Parameter(s):

• TemporalAmount amt – represents the amount to convert to a Duration.

Return value:

The return type of this method is Duration, it returns the Duration that is calculated from the given amount.

Example:

// Java program to demonstrate the example 
// of Duration from(TemporalAmount amt) method of Duration

import java.time.*;

public class FromOfDuration {
    public static void main(String args[]) {
        // Instantiates a Duration object
        Duration du1 = Duration.ofHours(10);

        // Display du1 
        System.out.println("du1: " + du1);

        // returns an instance of 
        // Duration from the given temporal 
        // amount i.e. here the given amount is
        // 10 hrs so it generates a new Duration
        // (du_from) for the given amount
        Duration du_from = Duration.from(du1);

        // Display du_from
        System.out.println("du_from: " + du_from);

        // Here, we are converting 10 hrs into Minutes
        System.out.println("du_from.toMinutes(): " + du_from.toMinutes());

        // Here, we are converting 10 hrs into Seconds
        System.out.println("du_from.toSeconds(): " + du_from.toSeconds());
    }
}

Output

du1: PT10H
du_from: PT10H
du_from.toMinutes(): 600
du_from.toSeconds(): 36000