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);
}
}
} |
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