HELP

public static void main(String[] args) {
        //在此编写你的代码
        ArrayList<Thread> list = new ArrayList<>();
        list.add(new Thread(new SpecialThread()));
        list.add(new Thread(new SpecialThread()));
        list.add(new Thread(new SpecialThread()));
        list.add(new Thread(new SpecialThread()));
        list.add(new Thread(new SpecialThread()));
        list.get(0).start();
        list.get(1).start();
        list.get(2).start();
        list.get(3).start();
        list.get(4).start();
    }