The Java.util.concurrent.atomic.AtomicIntegerArray.getAndAdd() is an inbuilt method in Java that atomically adds the given value to the element at an index of the AtomicIntegerArray. This method takes the index value of the AtomicIntegerArray and the value to be added as the parameters and returns the value before the add operation. The function getAndAdd() is similar to addAndGet() but the former function returns the value before the add operation whereas the latter returns the value after the add operation.
Syntax:
public final int getAndAdd(int i, int delta)
Parameters: The function accepts two parameters:
- i – The index where value is to be added.
- delta – The value to be added.
Return value: The function returns the value before the add operation which is in Integer.
Below programs illustrate the above method:
Program 1:
Java
// Java program that demonstrates// the getAndAdd() functionimport java.util.concurrent.atomic.AtomicIntegerArray;public class GFG { public static void main(String args[]) { // Initializing an array int a[] = { 10, 22, 33, 44, 55 }; // Initializing an AtomicIntegerArray with array a AtomicIntegerArray arr = new AtomicIntegerArray(a); // Displaying the AtomicIntegerArray System.out.println("The array : " + arr); // Index where value is to be added int idx = 0; // Value to add with value at idx int x = 16; // Updating the value at // idx applying getAndAdd and // storing the previous value int prev = arr.getAndAdd(idx, x); // Previous value at index idx // before update System.out.println("Value at index " + idx + " before update is " + prev); // Displaying the AtomicIntegerArray System.out.println("The array after update : " + arr); }} |
Output:
The array : [10, 22, 33, 44, 55] Value at index 0 before update is 10 The array after update : [26, 22, 33, 44, 55]
Program 2:
Java
// Java program that demonstrates// the getAndAdd() functionimport java.util.concurrent.atomic.AtomicIntegerArray;public class GFG { public static void main(String args[]) { // Initializing an array int a[] = { 1, 2, 3, 4, 5 }; // Initializing an AtomicIntegerArray with array a AtomicIntegerArray arr = new AtomicIntegerArray(a); // Displaying the AtomicIntegerArray System.out.println("The array : " + arr); // Index where value is to be added int idx = 3; // Value to add with value at idx int x = 16; // Updating the value at // idx applying getAndAdd and // storing the previous value int prev = arr.getAndAdd(idx, x); // Previous value at index idx // before update System.out.println("Value at index " + idx + " before update is " + prev); // Displaying the AtomicIntegerArray System.out.println("The array after update : " + arr); }} |
Output:
The array : [1, 2, 3, 4, 5] Value at index 3 before update is 4 The array after update : [1, 2, 3, 20, 5]
