如何在Java中实现嵌套迭代器类

我有课, Deck ,其中包含 ArrayList 的类型 <Card> .我试图在内部实现几个嵌套的迭代器类 甲板 (不使用 ListIterator -第一个是通过 ArrayList<Card> 持有人: 甲板 整齐但是,我很难让它正常工作:

private static class DeckIterator implements Iterator<Card> {
    private int nextCard;
    private final ArrayList<Card> cards;

    public DeckIterator(ArrayList<Card> cards) {
        this.cards = cards;
        this.nextCard = 0;
    }

    @Override
    public boolean hasNext() {
        if (nextCard > cards.size() - 1) {
            return false;
        }
        else {
            return true;
        }
    }

    @Override
    public Card next() {
        if (hasNext() == true) {
            return cards.get(nextCard + 1);
        }
        else {
            return null;
        }
    }
}

这是我的 main :

public static void main(String[] args) {
        Deck newDeck = new Deck();
        Iterator<Card> iterator = new DeckIterator();
        while (DeckIterator.hasNext()) {
            Card card = DeckIterator.next();
        }
    }
}

我正在 constructor DeckIterator in class DeckIterator cannot be applied to given types; required: ArrayList<Card>, found: no arguments 。