The java.DoubleAdder.add() is an inbuilt method in java that adds the given value to the previous or initial value. When the object of the class is created its initial value is zero.
Syntax:
public void add(double x)
Parameters: This method accepts a single parameter x that specifies the value to be added.
Return Value: The method returns the new value after the addition operation.
Below programs illustrate the above function:
Program 1:
// Program to demonstrate the add() 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);          // Print after add operation        System.out.println(" the current value is: " + num);    }} |
Output:
the current value is: 52.0
Program 2:
// Program to demonstrate the add() 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(1);          // Print after add operation        System.out.println(" the current value is: " + num);    }} |
Output:
the current value is: 1.0
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/DoubleAdder.html#add-double-
