Question

Write a method called stutter that accepts an ArrayList of strings and an integer k as parameters and that replaces every string with k copies of that string. 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?"] after the method finishes executing. If k is 0 or negative, the list should be empty after the call.

Answer 1

public void stutter(ArrayList<String> str, int k) {
    if(k <= 0) {
        str.clear();
    } else {
        int size = str.size();
        for(int i = 0; i < k*size; ++i) {
            if(i % k != 0) {
                str.add(i, str.get(i-1));
            }
        }
    }
}