AtomicBoolean compareAndSet() method in Java with Examples

// Java Program to demonstrates
// the compareAndSet() function

import java.util.concurrent.atomic.AtomicBoolean;

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

        // Initially value as false
        AtomicBoolean val = new AtomicBoolean(false);

        // Prints the updated value
        System.out.println("Previous value: "
                           + val);

        // Checks if previous value was false
        // and then updates it
        boolean res = val.compareAndSet(false, true);

        // Checks if the value was updated.
        if (res)
            System.out.println("The value was"
                               + " updated and it is "
                               + val);
        else
            System.out.println("The value was "
                               + "not updated");
    }
}

// Java Program to demonstrates
// the compareAndSet() function

import java.util.concurrent.atomic.AtomicBoolean;

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

        // Initially value as true
        AtomicBoolean val = new AtomicBoolean(true);

        // Prints the updated value
        System.out.println("Previous value: "
                           + val);

        // Checks if previous value was true
        // and then updates it
        boolean res = val.compareAndSet(true, false);

        // Checks if the value was updated.
        if (res)
            System.out.println("The value was"
                               + " updated and it is "
                               + val);
        else
            System.out.println("The value was "
                               + "not updated");
    }
}