DoubleAdder toString() method in Java with Examples

The java.DoubleAdder.toString() is an inbuilt method in java that returns the String representation of the sum() method. When the object of the class is created its initial value is zero.

Syntax:

public String toString()

Parameters: This method does not accepts any parameter.

Return Value: The method returns the string representation of the sum.

Below programs illustrate the above method:

Program 1:

// Program to demonstrate the toString() method

import java.lang.*;
import java.util.concurrent.atomic.DoubleAdder;

public class GFG {
    public static void main(String args[])
    {
        DoubleAdder num = new DoubleAdder();

        // add operation on num
        num.add(42);
        num.add(10);

        // sum operation on num
        num.sum();

        // Print after sum operation
        System.out.println(" the value after sum() is: " + num);

        // toString operation on variable num
        num.toString();

        // Print after toString operation
        System.out.println("the value after toString() is: " + num);
    }
}

Output:

the value after sum() is: 52.0
the value after toString() is: 52.0

Program 2:

// Program to demonstrate the toString() method

import java.lang.*;
import java.util.concurrent.atomic.DoubleAdder;

public class GFG {
    public static void main(String args[])
    {
        DoubleAdder num = new DoubleAdder();

        // add operation on num
        num.add(402);

        // sum operation on num
        num.sum();

        // Print after sum operation
        System.out.println(" the value after sum() is: " + num);

        // toString operation on variable num
        num.toString();

        // Print after toString operation
        System.out.println("the value after toString() is: " + num);
    }
}

Output:

the value after sum() is: 402.0
the value after toString() is: 402.0

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/DoubleAdder.html#toString–