安全线程数据集合CopyOnWriteArrayList

package com.pln.syn;
import java.util.concurrent.CopyOnWriteArrayList;
public class TestJUC {
    public static void main(String[] args) throws InterruptedException {
        CopyOnWriteArrayList<String> list = new CopyOnWriteArrayList<String>();
        for (int i = 0; i < 10000; i++) {
            list.add(Thread.currentThread().getName());
        }
        Thread.sleep(3000);
        System.out.println(list.size());
    }
}