Skip to content
Related Articles

Related Articles

Improve Article

AtomicLong updateAndGet() method in Java with Examples

  • Last Updated : 04 Feb, 2021

The Java.AtomicLong.updateAndGet() method is an inbuilt method, which updates the current value of the object by applying the specified operation on the current value. It takes an object of LongUnaryOperator interface as its parameter and applies the operation specified in the object to the current value. It returns the updated value.

Syntax:  

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more,  please refer Complete Interview Preparation Course.

public final long updateAndGet(LongUnaryOperator function)

Parameters: This method accepts as parameter an LongUnaryOperator function. It applies the given function to the current value of the object.

Return Value: The function returns the updated value of the current object.



Example to demonstrate the function. 

Java




// Java program to demonstrate
// AtomicLong updateAndGet() method
 
import java.util.concurrent.atomic.AtomicLong;
import java.util.function.LongUnaryOperator;
 
public class Demo {
    public static void main(String[] args)
    {
        // AtomicLong initialized with a value of -20000
        AtomicLong al = new AtomicLong(-20000);
 
        // Unary operator defined to negate the value
        LongUnaryOperator unaryOperator = (x) -> - x;
 
        System.out.println("Initial Value is " + al);
 
        // Function called and the unary operator
        // is passed as an argument
        long x = al.updateAndGet(unaryOperator);
        System.out.println("Updated value is " + x);
    }
}
Output: 
Initial Value is -20000
Updated value is 20000

 

Reference: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicLong.html
 

My Personal Notes arrow_drop_up
Recommended Articles
Page :