Java集合类（1）-List

public class ArrayListInThread implements Runnable{

    //线程不安全
    private List threadList = new ArrayList();
//线程安全
//private List threadList = Collections.synchronizedList(new ArrayList());

    @Override
    public void run() {
        try {
            Thread.sleep(10);
        }catch (InterruptedException e){
            e.printStackTrace();
        }
//把当前线程名称加入list中
        threadList.add(Thread.currentThread().getName());
    }

    public static void main(String[] args) throws InterruptedException{
        ArrayListInThread listThread = new ArrayListInThread();


        for(int i = 0; i < 100; i++){
            Thread thread = new Thread(listThread, String.valueOf(i));
            thread.start();
        }

//等待子线程执行完
        Thread.sleep(2000);

        System.out.println(listThread.threadList.size());
//输出list中的值
        for(int i = 0; i < listThread.threadList.size(); i++){
            if(listThread.threadList.get(i) == null){
                System.out.println();;
            }
            System.out.print(listThread.threadList.get(i) + " ");
        }
    }
}