AtomicReference

package japan.example.test;

import java.io.IOException;
import java.util.concurrent.atomic.AtomicReference;
import java.util.concurrent.atomic.AtomicStampedReference;

public class FinalTest {

    public final static AtomicReference<String> ATOMIC_REFERENCE = new AtomicReference<String>("abc");

    public static void main(String[] args) throws IOException {
        for (int i = 0; i < 100; i++) {
            final int num = i;
            new Thread(() -> {
                try {
                    Thread.sleep(Math.abs((int) (Math.random() * 100)));
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                if (ATOMIC_REFERENCE.compareAndSet("abc", "abc2")) {
                    System.out.println("我是线程：" + num + ",我获得了锁进行了对象修改！");
                }
            }).start();
        }

        new Thread(() -> {
            while (ATOMIC_REFERENCE.compareAndSet("abc2", "abc")) {
                System.out.println("已经改回为原始值！");
            }
        }).start();

        // System.in.read();
    }

}