Duration plus(Duration) method in Java with Examples

The plus(Duration) method of Duration Class in java.time package is used to get an immutable copy of this duration with the specified duration added, passed as the parameter.

Syntax:

public Duration plus(Duration duration)

Parameters: This method accepts a parameter duration which is the duration to be added. It can be positive or negative but not null.

Return Value: This method returns a Duration which is an immutable copy of the existing duration with the parameter amount of duration added to it.

Exception: This method throws ArithmeticException if numeric overflow occurs.

Below examples illustrate the Duration.plus() method:

Example 1:

// Java code to illustrate plus() method

import java.time.Duration;

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

        // Duration 1 using parse() method
        Duration duration1
            = Duration.parse("P2DT3H4M");

        // Duration 2 using ofHours() method
        Duration duration2
            = Duration.ofHours(5);

        // Get the duration added
        // using plus() method
        System.out.println(duration1
                               .plus(duration2));
    }
}

Output:

PT56H4M

Example 2:

// Java code to illustrate plus() method

import java.time.Duration;

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

        // Duration 1 using parse() method
        Duration duration1
            = Duration.parse("P0DT0H4M");

        // Duration 2 using ofHours() method
        Duration duration2
            = Duration.ofDays(5);

        // Get the duration added
        // using plus() method
        System.out.println(duration1
                               .plus(duration2));
    }
}

Output:

PT120H4M

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