public class NameGenerator {
  private static final List<Alphabet> letters = Collections.unmodifiableList(Arrays.asList(Alphabet.values()));
  private static Random rand = new Random();

  public static String newName()
  {
    int size = 3 + rand.nextInt(4);

    StringBuilder stringBuilder = new StringBuilder();
    while (size > 0)
    {
      size--;
      stringBuilder.append(getRandomLetter());
    }
    stringBuilder.append(rand.nextInt(999999));

    return stringBuilder.toString();
  }

  private static String getRandomLetter()
  {
    return ((Alphabet)letters.get(rand.nextInt(letters.size()))).name();
  }

  private static enum Alphabet
  {
    a,  b,  c,  d,  e,  f,  g,  h,  i,  j,  k,  l,  m,  n,  o,  p,  q,  r,  s,  t,  u,  v,  w,  x,  y,  z;

    private Alphabet() {}
  }
}