在Java中使用递归从和ArrayList中分离偶数和奇数索引

public static ArrayList[] separateEvenOdd(ArrayList<Integer> list) {
    ArrayList<Integer> evenList = new ArrayList<>();
    ArrayList<Integer> oddList = new ArrayList<>();
    separateEvenOddHelper(list, evenList, oddList, 0);
    return new ArrayList[]{evenList, oddList};
}

private static void separateEvenOddHelper(ArrayList<Integer> list, ArrayList<Integer> evenList, ArrayList<Integer> oddList, int index) {
    if (index >= list.size()) {
        return;
    }
    
    if (index % 2 == 0) {
        evenList.add(list.get(index));
    } else {
        oddList.add(list.get(index));
    }
    
    separateEvenOddHelper(list, evenList, oddList, index + 1);
}

public static void main(String[] args) {
    ArrayList<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
    ArrayList[] result = separateEvenOdd(list);
    
    System.out.println("偶数索引的元素：" + result[0]);
    System.out.println("奇数索引的元素：" + result[1]);
}