AtomicLongArray getAndAdd() method in Java with Examples Last Updated : 24 Nov, 2021 Summarize Comments Improve Suggest changes Share Like Article Like Report The Java.util.concurrent.atomic.AtomicLongArray.getAndAdd() is an inbuilt method in Java that atomically adds the given value to the element at an index of the AtomicLongArray. This method takes the index value of the AtomicLongArray 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 long getAndAdd(int i, long 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 long.Below programs illustrate the above method:Program 1: Java // Java program that demonstrates // the getAndAdd() function import java.util.concurrent.atomic.AtomicLongArray; public class GFG { public static void main(String args[]) { // Initializing an array long a[] = { 10, 22, 33, 44, 55 }; // Initializing an AtomicLongArray with array a AtomicLongArray arr = new AtomicLongArray(a); // Displaying the AtomicLongArray System.out.println("The array : " + arr); // Index where value is to be added int idx = 0; // Value to add with value at idx long x = 16; // Updating the value at // idx applying getAndAdd and // storing the previous value long 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 AtomicLongArray 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() function import java.util.concurrent.atomic.AtomicLongArray; public class GFG { public static void main(String args[]) { // Initializing an array long a[] = { 1, 2, 3, 4, 5 }; // Initializing an AtomicLongArray with array a AtomicLongArray arr = new AtomicLongArray(a); // Displaying the AtomicLongArray System.out.println("The array : " + arr); // Index where value is to be added int idx = 3; // Value to add with value at idx long x = 16; // Updating the value at // idx applying getAndAdd and // storing the previous value long 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 AtomicLongArray 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] Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLongArray.html#getAndAdd-int-long- Comment More infoAdvertise with us Next Article AtomicLongArray getAndUpdate() method in Java with Examples R rupesh_rao Follow Improve Article Tags : Java Java - util package Java-Functions Java-AtomicLongArray Practice Tags : Java Similar Reads AtomicLong getAndAdd() method in Java with examples The Java.util.concurrent.atomic.AtomicLong.getAndAdd() is an inbuilt method in java that adds the given value to the current value and returns the value before updation which is of data-type long. 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