Question

Write a method manyStrings that takes an ArrayList of Strings and an integer n as parameters and that replaces every String in the original list with n of that String. For example, suppose that an ArrayList called "list" contains the following values:("squid", "octopus")And you make the following call:manyStrings(list, 2);Then list should store the following values after the call:("squid", "squid", "octopus", "octopus")As another example, suppose that list contains the following:("a", "a", "b", "c")and you make the following call:manyStrings(list, 3);Then list should store the following values after the call:("a", "a", "a", "a", "a", "a", "b", "b", "b", "c", "c", "c")You may assume that the ArrayList you are passed contains only Strings and that the integer n is greater than 0.

Answer 1

Answer:

public static ArrayList manyStrings(ArrayList<String> list, int n){

    ArrayList<String> newList = new ArrayList<String>();

    for (int i=0; i<list.size(); i++) {

        for (int j=0; j<n; j++) {

            newList.add(list.get(i));

        }

    }

    return newList;

}

Explanation:

Create a method called manyStrings that takes two parameters, list and n

Create a new ArrayList that will hold new values

Create a nested for loop. The outer loop iterates through the list. The inner loop adds the elements, n of this element, to the newList.

When the loops are done, return the newList