The Java.AtomicInteger.accumulateAndGet() 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 updated value.
Syntax:
public final int accumulateAndGet(int y,
IntBinaryOperator function)
Parameters: This method accepts as parameter an integer value y and an IntBinaryOperator function. It applies the given function to the current value of the object and the value y.
Return Value: The function returns the updated value of the current object.
Example to demonstrate the function.
// Java program to demonstrate
// AtomicInteger accumulateAndGet() 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(0);
}
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
.accumulateAndGet(value, ibo);
System.out.println(name + " " + ans);
}
}
}
Output:
Thread A 5 Thread A 10 Thread A 15 Thread B 20 Thread B 25 Thread B 30
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicInteger.html
