hangman/Dictionary.java

import java.util.*;
import java.io.*;

public class Dictionary
{
   public static final String ALPHABET = "abcdefghijklmnopqrstuvwxyz";
   private ArrayList<String> wordList;
   
   public Dictionary()
   {
      loadWords();
   }
   
   public String getRandomWord()
   {
      int idx = (int)(Math.random() * this.wordList.size());
      return wordList.get(idx);
   }
   
   private void loadWords()
   {
      this.wordList = new ArrayList<String>();
      File f = new File("words.txt");
      try
      {
         Scanner in = new Scanner(f);
         while(in.hasNext())
         {
            String word = in.next();
            wordList.add(word);
         }
         in.close();
      }
      catch(FileNotFoundException ex)
      {
         System.out.println("File not found.");
      }
   }
}