AtomicLong incrementAndGet() method in Java with examples

The Java.util.concurrent.atomic.AtomicLong.incrementAndGet() is an inbuilt method in java that increases the previous value by one and returns the value after updation which is of data-type long.

Syntax:

public final long incrementAndGet()

Parameters: The function does not accepts a single parameter. 
Return value: The function returns the value after increment operation is performed to the previous value. 

Below programs illustrate the above method:

Program 1: 

Java

// Java program that demonstrates
// the incrementAndGet() function

import java.util.concurrent.atomic.AtomicLong;

public class GFG {
    public static void main(String args[])
    {

        // Initially value as 0
        AtomicLong val
            = new AtomicLong(0);

        System.out.println("Previous value: "
                           + val);

        // Increment and get
        long res
            = val.incrementAndGet();

        // Prints the updated value
        System.out.println("Current value: "
                           + res);
    }
}

Output:

Previous value: 0
Current value: 1

Program 2: 

Java

// Java program that demonstrates
// the incrementAndGet() function

import java.util.concurrent.atomic.AtomicLong;

public class GFG {
    public static void main(String args[])
    {

        // Initially value as 18
        AtomicLong val
            = new AtomicLong(18);

        System.out.println("Previous value: "
                           + val);

        // Increment and get new value
        long res = val.incrementAndGet();

        // Prints the updated value
        System.out.println("Current value: "
                           + res);
    }
}

Output:

Previous value: 18
Current value: 19

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