手动排序整数数组列表

Question

给定两个不同大小的数组列表，我需要在新的ArrayList中返回它们的排序联合。

这是代码。我不断得到一个数组越界错误，如果我不按顺序排列它们（随机）。

public static ArrayList<Integer> merge(ArrayList<Integer> l1, ArrayList<Integer> l2) {
    int i = 0;
    int pointer1 = 0;
    int pointer2 = 0;
    ArrayList<Integer> list = new ArrayList<Integer>();
    while (list.size() < ((l1.size() + l2.size()))) {
        if (pointer1 < 11 && pointer2 < 21) {
            if (l1.get(pointer1) == l2.get(pointer2)) {
                list.add(l1.get(pointer1));
                list.add(l2.get(pointer2));
                pointer1++;
                pointer2++;
            } else if (l1.get(pointer1) > l2.get(pointer2)) {
                list.add(l1.get(pointer1));
                pointer1++;
            } else if (l2.get(pointer2) > l1.get(pointer1)){
                list.add(l2.get(pointer2));
                pointer2++;
            }
        } else if (pointer2 < 20) {
            list.add(l2.get(pointer2));
            pointer2++;
        } else if (pointer1 < 10) {
            list.add(l2.get(pointer2));
            pointer2++;
        }
    }

    return list;
}

Answer 1

Hello下面是合并和排序两个ArrayList的简单代码.Hope对你很有帮助..

public static ArrayList<Integer> merge(ArrayList<Integer> l1, ArrayList<Integer> l2) {
        ArrayList<Integer> list = new ArrayList<Integer>();
        list.addAll(l1);
        list.addAll(l2);
        Collections.sort(list);
        return list;
    }