public static String join(String glue, Iterable<String> strings) {
  if (strings == null) ret "";
  new StringBuilder buf;
  Iterator<S> i = strings.iterator();
  if (i.hasNext()) {
    buf.append(i.next());
    while (i.hasNext())
      buf.append(glue).append(i.next());
  }
  ret buf.toString();
}

public static S join(S glue, S... strings) {
  ret join(glue, Arrays.asList(strings));
}

static S join(Iterable<S> strings) {
  ret join("", strings);
}

static S join(Iterable<S> strings, S glue) {
  ret join(glue, strings);
}

public static S join(String[] strings) {
  ret join("", strings);
}