The Java.DoubleAccumulator.accumulate() method is an inbuilt method in Java that updates with the given value in this DoubleAccumulator instance. It means that it takes a double value as a parameter and adds it up to this instance of DoubleAccumulator on which it is called.
Syntax:
public void accumulate(double valueToBeAccumulated)
Parameters: This method accepts a single mandatory parameter valueToBeAccumulated which is the double value to be updated in the current instance of this DoubleAccumulator.
Return value: This method do not return any value. It just updates this DoubleAccumulator.
Program below demonstrates the function:
Program 1:
Java
// Java program to demonstrate// the accumulate() methodimport java.lang.*;import java.util.concurrent.atomic.DoubleAccumulator;public class GFG { public static void main(String args[]) { // Create the DoubleAccumulator instance DoubleAccumulator num = new DoubleAccumulator(Double::sum, 0L); // Print after accumulator System.out.println("Current DoubleAccumulator" + " value is: " + num); // Update 2 in this instance // using accumulate() method num.accumulate(2); // Print after accumulator System.out.println("Updated DoubleAccumulator" + " value is: " + num); }} |
Output:
Current DoubleAccumulator value is: 0.0 Updated DoubleAccumulator value is: 2.0
Program 2:
Java
// Java program to demonstrate// the accumulate() methodimport java.lang.*;import java.util.concurrent.atomic.DoubleAccumulator;public class GFG { public static void main(String args[]) { // Create the DoubleAccumulator instance DoubleAccumulator num = new DoubleAccumulator(Double::sum, 0L); // Print after accumulator System.out.println("Current DoubleAccumulator" + " value is: " + num); // Update 42.2 in this instance // using accumulate() method num.accumulate(42.2); // Print after accumulator System.out.println("Updated DoubleAccumulator" + " value is: " + num); }} |
Output:
Current DoubleAccumulator value is: 0.0 Updated DoubleAccumulator value is: 42.2
