LongAccumulator accumulate() method in Java with examples

The java.LongAccumulator.accumulate() is an inbuilt method in java that updates a particular LongAccumulator object with the given value.

Syntax:

public void accumulate(long x)

Parameters: The method accepts a single parameter x that is the value by which the current LongAccumulator object is to be update.

Return Value: The method returns the updated value.

Below programs illustrate the above method:

Program 1:

// Program to demonstrate the accumulate() method
import java.lang.*;
import java.util.concurrent.atomic.LongAccumulator;

public class GFG {
    public static void main(String args[])
    {
        LongAccumulator num = new LongAccumulator(Long::sum, 0L);

        // accumulate operation on num
        num.accumulate(2);

        // Print after accumulate
        System.out.println("After update the value is: " + num);
    }
}

Output:

After update the value is: 2

Program 2:

// Program to demonstrate the accumulate() method

import java.lang.*;
import java.util.concurrent.atomic.LongAccumulator;

public class GFG {
    public static void main(String args[])
    {
        LongAccumulator num = new LongAccumulator(Long::sum, 0L);

        // accumulate operation on num
        num.accumulate(5);

        // Print after accumulate
        System.out.println("After update the value is: " + num);
    }
}

Output:

After update the value is: 5

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/LongAccumulator.html#accumulate-long-