Implementing ArrayList Algorithms Practice Test

public class ListFilter

{

public static ArrayList<String> filterByLength(ArrayList<String> words, int len)

{

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

    for (String word : words)

    {

        if (word.length() == len)

        {

            result.add(word);

        }

    }

    return result;

}

}

public class Checker

{

public static boolean hasDuplicates(ArrayList<String> items)

{

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

    {

        for (int j = i + 1; j < items.size(); j++)

        {

            if (items.get(i).equals(items.get(j)))

            {

                return true;

            }

        }

    }

    return false;

}

}