/**     Uses an ArrayList to contain a collection 
 *      of String words.
 */
public class WordList extends java.util.ArrayList{
 
    /** Constructs an empty Wordset.
     */
    public WordList(){
        super();
    }
    
    /** Constructs a WordList from an array of 
     *  word string objects.
     */
    public WordList(String[] words){
        super();
        for (int i = 0; i < words.length;i++){
            add(words[i]);
        }
    }
        
    /** Counts the number of times the input string matches 
     *  exactly each word in the ArrayList
     */
    public int getOccurances(String word){
        int occurances = 0;
        java.util.Iterator iterator = iterator();
        while (iterator.hasNext()){
            String nextWord = (String)iterator.next();
            if (nextWord.equals(word)) occurances++;
        }
        return occurances;
    }
    
    /** Determines if the input string matches 
     *  at least one word in the ArrayList.
     */
    public boolean occurs(String word){
        return contains(word);
    }
    
    /** Returns the String array of words.
     */
    public String[] getWords(){
        String[] strings = new String[size()];
        for (int i = 0;i < size(); i++){
            strings[i] = (String)get(i);
        }
        return strings;
    }
 
    /** Returns the array of words as a List.
     */
    public java.util.List getList(){
        return (java.util.List)this;
    }
    
    /** Sorts the underlying an array of word 
     *  string objects using the static
     *  Arrays.sort(String[]) method.
     */
    public void sort(){
        java.util.Arrays.sort(getWords());
    }
 
}

public class Test{
    public static void main(String[] args){
        new Test().test();
    }
    
    public void test(){
        WordList wordList = new WordList();
        wordList.add("One");
        wordList.add("Two");
        wordList.add("Three");
        wordList.add("Four");
        wordList.add("Two");
        wordList.add("Five");
        wordList.add("Six");
        wordList.add("Six");
        wordList.add("Two");
        wordList.add("Seven");
        wordList.add("Seven");
        wordList.add("Two");
        wordList.add("Two");
        wordList.add("Seven");
        System.out.println("There are " 
            + String.valueOf(wordList.getOccurances("Two")) 
            + " occurances of Two in this list.");
        System.out.println("There are " 
            + String.valueOf(wordList.getOccurances("Seven")) 
            + " occurances of Seven in this list.");
        System.out.println("There are " 
            + String.valueOf(wordList.getOccurances("One")) 
            + " occurances of One in this list.");
        System.out.println("There are " 
            + String.valueOf(wordList.getOccurances("Ten")) 
            + " occurances of Ten in this list.");
    }
}