import java.util.List;
import java.util.ArrayList;
import java.util.Scanner;
import java.io.File;

/**
 * Simple Dictionary class for storing and accessing words.
 *   @author Dave Reed
 *   @version 9/1/06
 */
public class Dictionary {
    private List<String> words;
    
    /** 
     * Constructs an empty dictionary.
     */
    public Dictionary() {
        words = new ArrayList<String>();
    }
    
    /**
     * Constructs a dictionary and initializes to store words from a file.
     *   @param filename the name of the file of words
     */
     public Dictionary(String filename) {
        this();
        
        try {
            Scanner infile = new Scanner(new File(filename));
            while (infile.hasNext()) {
                String nextWord = infile.next();
                words.add(nextWord.toLowerCase());
            }
        }
        catch (java.io.FileNotFoundException e) {
            System.out.println("FILE NOT FOUND");
        }
    }
    
    /**
     * Adds a words to the dictionary.
     *   @param newWord the word to be added
     */
    public void add(String newWord) {
        words.add(newWord.toLowerCase());
    }
    
    /**
     * Removes a word from the dictionary.
     *   @param oldWord the word to be removed
     */
    public void remove(String oldWord) {
        words.remove(oldWord.toLowerCase());
    }
    
    /**
     * Dtermines whether a word is stored in the dictionary.
     *   @param testWord the word to be searched for
     *   @return true if testWord is stored; else false
     */
    public boolean contains(String testWord) {
        return words.contains(testWord.toLowerCase());
    }
}