Thread Safety With AtomicInteger

Question

Why is AtomicInteger preferred over a volatile int in this recursive multithreaded context?
 
```java
import java.util.concurrent.atomic.AtomicInteger;

public class AtomicRecursive {
    private static AtomicInteger counter = new AtomicInteger(0);
    
    public static void recursiveIncrement(int n) {
        if(n <= 0) return;
        counter.getAndIncrement();
        new Thread(() -> recursiveIncrement(n - 1)).start();
    }
    
    public static void main(String[] args) throws InterruptedException {
        recursiveIncrement(5);
        Thread.sleep(1000);
        System.out.println("Counter: " + counter.get());
    }
}
```

Accepted Answer

AtomicInteger provides atomic operations for increments, ensuring thread-safety for compound actions, which volatile does not guarantee.

Answer

AtomicInteger is only used to improve performance, not for thread-safety.

Answer

Both volatile int and AtomicInteger offer the same thread safety for compound operations.

Answer

A volatile int automatically handles atomic increments, making AtomicInteger redundant.

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