The Java.AtomicInteger.getAndAccumulate() method is an inbuilt method, which updates the current value of the object by applying the specified operation on the current value and value passed as a parameter. It takes an integer as its parameter and an object of IntBinaryOperator interface and applies the operation specified in the object to the values. It returns the previous value.
Syntax:
public final int getAndAccumulate(int y,
IntBinaryOperator function)
Parameters: This method accepts two parameters:
- y: an integer on which the function is to be applied.
- function: function applied to the current value of the object and the value y.
Return Value: The function returns the previous value of the current object.
Example to demonstrate the function.
// Java program to demonstrate// working of getAndAccumulate() method import java.util.concurrent.atomic.AtomicInteger;import java.util.function.IntBinaryOperator; public class Demo { public static void main(String[] args) { new UserThread("Thread A"); new UserThread("Thread B"); }} class Shared { static AtomicInteger ai = new AtomicInteger(1);} class UserThread implements Runnable { String name; UserThread(String name) { this.name = name; new Thread(this).start(); } IntBinaryOperator ibo = (x, y) -> (x * y); int value = 5; @Override public void run() { for (int i = 0; i < 3; i++) { int ans = Shared.ai .getAndAccumulate(value, ibo); System.out.println(name + " " + ans); } }} |
Output:
Thread A 1 Thread A 5 Thread A 25 Thread B 125 Thread B 625 Thread B 3125
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicInteger.html