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AtomicIntegerArray set() method in Java with Examples

Last Updated : 27 Feb, 2019
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The Java.util.concurrent.atomic.AtomicIntegerArray.set() is an inbuilt method in Java that sets a given value at any position of the AtomicIntegerArray. This method takes the index value of the AtomicIntegerArray as parameter and updates the value at that index. This method does not return any value. The function set() is similar to getAndSet() function but the former does not return any value while the latter returns the value at the given index before setting the new value at that index. Syntax: 
public final void set(int i, int newValue)
Parameters: The function takes two parameters:
  • i - The index value where the update is to be made.
  • newValue - The new value to update at the index.
Return Value: The function does not return any value. Below programs illustrate the above method: Program 1: Java 
// Java program that demonstrates
// the set() function

import 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 operation is performed
        int idx = 0;

        // The new value to update at idx
        int val = 10;

        // Updating the value at
        // idx applying set
        arr.set(idx, val);

        // Displaying the AtomicIntegerArray
        System.out.println("The array after update : "
                           + arr);
    }
}
Output: 
The array : [1, 2, 3, 4, 5]
The array after update : [10, 2, 3, 4, 5]
Program 2: Java 
// Java program that demonstrates
// the set() function

import 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 operation is performed
        int idx = 3;

        // The new value to update at idx
        int val = 100;

        // Updating the value at
        // idx applying set
        arr.set(idx, val);

        // Displaying the AtomicIntegerArray
        System.out.println("The array after update : "
                           + arr);
    }
}
Output: 
The array : [1, 2, 3, 4, 5]
The array after update : [1, 2, 3, 100, 5]
Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicIntegerArray.html#set-int-int-

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