class Test {
  public static void main(String[] args){
    LinkedList xs = new LinkedList();
    xs.add(new Byte(0)); xs.add(new Byte(1));
    Byte x = (Byte) Collections.max(xs);

    LinkedList ys = new LinkedList();
    ys.add(new Boolean(false)); ys.add(new Boolean(true));
    Boolean y = (Boolean) Collections.max(ys); // runtime error
  }
}