Small util for sorting teams. From desht. http://forums.bukkit.org/threads/separating-list-into-4-smaller-lists.151302/#post-1697221

gistfile1.java

public static <T> List<T>[] splitList(List<T> list, int nLists) {
  @SuppressWarnings("unchecked")
  List<T>[] res = (ArrayList<T>[]) new ArrayList[nLists];
  Collections.shuffle(list);
  for (int i = 0; i < list.size(); i++) {
    res[i % nLists].add(list.get(i));
  }
  return res;
}