AtomicInteger getAndAccumulate() method in Java with Examples
Last Updated :
03 Jun, 2019
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.
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
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