AtomicInteger getAndAdd() method in Java with examples

Last Updated : 29 Jan, 2019

The java.util.concurrent.atomic.AtomicInteger.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 int.

Syntax:

public final int getAndAdd(int val)

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

Return value: The function returns the value before addition is performed to the previous value.

Program below demonstrates the function:

Program 1:

// Java program that demonstrates 
// the getAndAdd() function 
  
import java.util.concurrent.atomic.AtomicInteger; 
  
public class GFG { 
    public static void main(String args[]) 
    { 
  
        // Initially value as 0 
        AtomicInteger val 
            = new AtomicInteger(0); 
  
        // Adds 7 and gets the previous value 
        int res 
            = val.getAndAdd(7); 
  
        // Prints the updated value 
        System.out.println("Previous value: "
                           + res); 
  
        System.out.println("Current value: "
                           + val); 
    } 
} 

Output:

Previous value: 0
Current value: 7

Program 2:

// Java program that demonstrates 
// the getAndAdd() 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 8 and gets the previous value 
        int res = val.getAndAdd(8); 
  
        // Prints the updated value 
        System.out.println("Previous value: "
                           + res); 
  
        System.out.println("Current value: "
                           + val); 
    } 
} 

Output:

Previous value: 18
Previous value: 18
Current value: 26

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

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AtomicInteger getAndAdd() method in Java with examples

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