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Java Duration Class | isZero() Method with Example

Duration Class isZero() method: Here, we are going to learn about the isZero() method of Duration Class with its syntax and example.
Submitted by Preeti Jain, on May 16, 2020

Duration Class isZero() method

• isZero() method is available in java.time package.
• isZero() method is used to check whether this Duration object holds the value of length is 0 or not.
• isZero() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• isZero() method does not throw an exception at the time of checking 0 lengths.

Syntax:

    public boolean isZero();

Parameter(s):

• None

Return value:

The return type of this method is boolean, it returns true when this Duration value length is 0 otherwise it returns false.

Example:

// Java program to demonstrate the example 
// of boolean isZero() method of Duration

import java.time.*;

public class IsZeroOfDuration {
    public static void main(String args[]) {
        // Instantiates three Duration objects
        Duration du1 = Duration.ofHours(-10);
        Duration du2 = Duration.parse("P1DT2H20M");
        Duration du3 = Duration.ofMinutes(0);

        // Display du1, du2 and du3
        System.out.println("du1: " + du1);
        System.out.println("du2: " + du2);
        System.out.println("du3: " + du3);

        System.out.println();

        // checks whether the value
        // of this Duration (du1) is zero
        // or not i.e here it returns false because
        // the value of du1 is not 0
        boolean status = du1.isZero();

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

        // checks whether the value
        // of this Duration (du2) is zero
        // or not i.e here it returns false because
        // the value of du2 is not 0
        status = du2.isZero();

        // Display status
        System.out.println("du2.isZero(): " + status);

        // checks whether the value
        // of this Duration (du3) is zero
        // or not i.e here it returns true because
        // the value of du3 is 0
        status = du3.isZero();

        // Display status
        System.out.println("du3.isZero(): " + status);
    }
}

Output

du1: PT-10H
du2: PT26H20M
du3: PT0S

du1.isZero(): false
du2.isZero(): false
du3.isZero(): true