CopyOnWriteArrayList JUC当中安全容器

package 多线程练习;

import java.util.concurrent.CopyOnWriteArrayList;

/*
   CopyOnWriteArrayList 是JUC当中的安全容器其中用了lock锁 可重入锁
 */

public class CopyOnWriteArrayListDemo {
    public static void main(String[] args) {
        CopyOnWriteArrayList<String> list = new CopyOnWriteArrayList<>();
        for (int i = 0; i < 10000; i++) {
            new Thread(() -> {
                list.add(Thread.currentThread().getName());
            }).start();
        }

        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println(list.size());

    }
}

输出结果