In what cases is the AtomicInteger class used in Java?

The AtomicInteger class in Java is used for atomic operations on integer values in a multithreaded environment without the need for synchronization (synchronized). This helps avoid issues with concurrent access and locking, improving performance.

Example usage:

import java.util.concurrent.atomic.AtomicInteger;

public class Counter {
    private AtomicInteger count = new AtomicInteger(0);

    public void increment() {
        count.incrementAndGet(); // atomic increment by 1
    }

    public int getCount() {
        return count.get();
    }
}

This class is useful when multiple threads need to safely modify a shared number without complex synchronization.