如何比較從初始arraylist到多個arraylists的對象，直到它返回true？

Question

    public  boolean makeSuggestion(ArrayList<Cards> firstPlayerCards,ArrayList<Cards> secondPlayerCards){
    Iterator<Cards> p1Iterator = firstPlayerCards.iterator();
    while (p1Iterator.hasNext()) {
        Iterator<Cards> p2Iterator = secondPlayerCards.iterator();
        while(p2Iterator.hasNext()) {
            Cards p1card = p1Iterator.next();
            Cards p2card = p2Iterator.next();
            if (p1card.equals(p2card)) {
                return false;
            }
        }
    }
    return true;
}

}

這是我到目前為止所擁有的。 我想將第一個arraylist（firstPlayerCards）的對象與其他arraylist的對象進行比較， 直到找到與它相等的對象。 然后它將返回true並停止該方法。

Answer 1

public  boolean makeSuggestion(ArrayList<Cards>firstPlayerCards, ArrayList<ArrayList<Cards>> compareLists){

    //For each card in first list
    for(Cards first: firstPlayerCard){

        //For each list you wish to compare against
        for(ArrayList<Cards> secondPlayerCards: compareLists){

            //For each card in the list compare against first list
            for(Cards second: secondPlayerCards){
                if(first.equals(second)) return true;
            }
        }
    }
}

這將迭代第一張卡片列表，並且對於每張卡片，它會遍歷第二個列表並比較每個對象，如果它們相等則返回true。

Answer 2

public  boolean makeSuggestion(ArrayList<Cards> firstPlayerCards,ArrayList<Cards> secondPlayerCards){
    for(Card firstPlayerCard:firstPlayerCards){
        for(Card secondPlayerCard:secondPlayerCards){
            if(firstPlayerCard.equals(secondPlayerCard)){
                return true;
            }
        }
    }
    return false;
}