《多线程总结篇》《多线程向一个数组里面添加数据》

package com.css.apps.base.dict.service;

import java.util.ArrayList;
import java.util.concurrent.CopyOnWriteArrayList;

/**
 * zt
 * 2021/6/17
 * 14:50
 */
public class TestDemo2 {
    /*public static void main(String[] args) {
        CopyOnWriteArrayList<String> list = new CopyOnWriteArrayList<>();
        for (int i = 0; i < 10000; i++) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    list.add(Thread.currentThread().getName());
                }
            }).start();
        }
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println(list.size());
    }*/
    public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        for (int i = 0; i < 10000; i++) {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    synchronized (list){
                        list.add(Thread.currentThread().getName());
                    }
                }
            }).start();
        }
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println(list.size());
    }

}