Duration isNegative() method in Java with Examples

The isNegative() method of Duration Class in java.time package is used to check if this duration is negative or not. It returns a boolean value depicting the same.

Syntax:

public boolean isNegative()

Parameters: This method do not accepts any parameter.

Return Value: This method returns a boolean value. If the duration is negative, then it returns true. Else it returns false.

Below examples illustrate the Duration.isNegative() method:

Example 1:

// Java code to illustrate isNegative() method

import java.time.Duration;

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

        // Get the text
        String time = "P2DT3H4M";

        // Duration using parse() method
        Duration duration = Duration.parse(time);

        // Duration using isNegative() method
        boolean isNegative = duration.isNegative();

        System.out.println(isNegative);
    }
}

Output:

false

Example 2:

// Java code to illustrate isNegative() method

import java.time.Duration;

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

        // Get the text
        String time = "-P2DT3H4M";

        // Duration using parse() method
        Duration duration = Duration.parse(time);

        // Duration using isNegative() method
        boolean isNegative = duration.isNegative();

        System.out.println(isNegative);
    }
}

Output:

true

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