问实现与通用双向链表可比的

EN

class Node<E extends Comparable<E>> { ....... }


class DList<E extends Comparable<E>>
{

[..]

    public void add(E c)
    {
        Node<E> finger = head;
        while (finger != null && ((finger.value().compareTo(c)) > 0))
            finger = finger.Next();

    }
}

class Chair extends Furniture
{


[.....]

    public int compareTo(Chair c)
    {
    if(this.getStyle().equals(c.getStyle()))
        return this.getColor().compareToIgnoreCase(c.getColor());
    return this.getStyle().compareToIgnoreCase(c.getStyle());
    }


}

    DList<Furniture> DD = new DList<Furniture>();