java - 在迭代数组列表时修改它

Question

如何在迭代数组列表时修改它？我想要仅在我迭代时处理的答案，请不要回答我可以保存它然后修改它的问题。

for (ListIterator<CardGroup> ShortSeqGroupListIterator = ShortSeqGroupList
                            .listIterator(); ShortSeqGroupListIterator.hasNext();) {
    CardGroup ShortSeqGroup = ShortSeqGroupListIterator.next();
    System.out.println("Iteration ---  "+ShortSeqGroup.getCardList());
    for (ListIterator<CardGroup> cardGroupListIterator = this.cardGroupList
                                .listIterator(); cardGroupListIterator.hasNext();) {
        CardGroup cardGroup = cardGroupListIterator.next();
        if (cardGroup.getCardGroupType() == CardGroupType.PURESEQUENCE
            || cardGroup.getCardGroupType() == CardGroupType.SHORTSEQUENCE) {
            continue;
        }
        Listindex = cardGroupListIterator.nextIndex() - 1;
        listOfIndex.add(Listindex); 
        cardGroup.setCardGroupType(CardGroupType.NONE);
        this.mergeExtraGroups();
    } 
    ShortSeqGroup.setCardGroupType(CardGroupType.NONE);
    this.mergeExtraGroups();
    this.markSets();
    this.markSequences(false);
    int PenaltyPointsShSeq = totalPenaltyOfUser(this.cardGroupList);
    PenaltyMapShortSeq.put(PenaltyPointsShSeq, this.cardGroupList);
    this.cardGroupList = clonedCardGroupList;
    System.out.println("&************************&");
    this.print();
}
NavigableMap<Integer, List<CardGroup>> descendedPenaltyMapShortSeq=PenaltyMapShortSeq.descendingMap();
System.out.println(descendedPenaltyMapShortSeq.firstKey());

我想对列表进行操作，然后保存操作后我需要取回列表的先前状态..问题当然是并发修改异常。

this.cardList 是我正在操作的列表，克隆的 cardgrouplist 是它的副本...cardGrouplist 第一个元素再次包含:数组列表

Answer 1

不要使用Iterator ，将其切换为正常 for(int i = 0; i < list.length; i++)循环。