在数组中重复序列

Question

In this problem, I am to write a method that accepts an ArrayList of strings and an integer . In this case, the integer would repeat the individual word a number of times as indicated by the integer. For example, if the list stores the values ["how", "are", "you?"] before the method is called and k is 4, it should store the values ["how", "how", "how", "how", "are", "are", "are", "are", "you?", "you?", "you?", "you?"] If k is 0 or negative, the list should be empty after the call.

public static void stutter(ArrayList<String> thing, int k) {
    if (k <= 0) {
        thing.clear(); // if k is 0
        return;
    }

    for (int i = 0; i< thing.size(); i+= k) {
        String temp = thing.get(i);
        for (int j = 0; j < k; j++) {
            thing.add(temp);
        }
    }
}

Answer 1

Never mind, I solved it; just some rearranging and it worked.

Answer 2

I haven't tested it please verify

 public static void stutter(ArrayList<String> thing, int k) {
    if (k <= 0) {
        thing.clear(); // if k is 0
        return;
    }

    ArrayList<String> newList = new ArrayList<>();
    for (int i = 0; i< thing.size(); i++) {
        String temp = thing.get(i);
        for (int j = 0; j < k; j++) {
            newList.add(temp);
        }
    }
    thing.clear();
    thing.addAll(newList);
}

Answer 3

Never mind, I solved it; just some rearranging and it worked.

public static void stutter(ArrayList<String> thing, int k) {
    if (k <= 0) {
        thing.clear();
        return;
    }
    for (int i = 0; i< thing.size(); i+= k) {
        String temp = thing.get(i);
        for (int j = 1; j < k; j++) {
            thing.add(i, thing.get(i));
        }

        if (i == thing.size()) {
            return;
        }
    }
}

If you guys can find any holes in this, feel free to point them out.