AtomicInteger addAndGet() method in Java with examples

The java.util.concurrent.atomic.AtomicInteger.addandget() is an inbuilt method in java which adds the value which is passed in the parameter of the function to the previous value and returns the new updated value which is of data-type int.

Syntax:

public final int addAndGet(int val)

Parameters: The function accepts a single mandatory parameter val which specifies the value to be added.

Return value: The function returns the integer value after addition is done.

Program below demonstrates the function:

Program 1:

// Java Program to demonstrates 
// the addandget() function 
  
import java.util.concurrent.atomic.AtomicInteger; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
  
        // Initially value as 0 
        AtomicInteger val 
            = new AtomicInteger(); 
  
        // Update the value 
        int c = val.addAndGet(6); 
  
        // Prints the updated value 
        System.out.println("Updated value: "
                           + c); 
    } 
} 

Output:

Updated value: 6

Program 2:

// Java Program to demonstrates 
// the addandget() function 
  
import java.util.concurrent.atomic.AtomicInteger; 
public class GFG { 
    public static void main(String args[]) 
    { 
  
        // Initially value as 18 
        AtomicInteger val 
            = new AtomicInteger(18); 
  
        // Prints the updated value 
        System.out.println("Previous value: "
                           + val); 
  
        // adds the value to 18 
        val.addAndGet(6); 
  
        // Prints the updated value 
        System.out.println("Updated value: "
                           + val); 
    } 
} 

Output:

Previous value: 18
Updated value: 24

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicInteger.html#addAndGet-int-

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