Java多线程原子引用赋值

import java.util.concurrent.atomic.AtomicReference;

public class AtomicReferenceExample {
    private static AtomicReference<String> atomicReference = new AtomicReference<>();

    public static void main(String[] args) {
        Thread thread1 = new Thread(() -> {
            atomicReference.compareAndSet(null, "Hello");
        });

        Thread thread2 = new Thread(() -> {
            atomicReference.compareAndSet("Hello", "World");
        });

        thread1.start();
        thread2.start();
        try {
            thread1.join();
            thread2.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        System.out.println(atomicReference.get());
    }
}