C#

public abstract class LinkedList<T>
{
    //....

    public static LinkList<T> GetDoubleLinked()
    {
        return new DoubleLinked<T>();
    }

    public static LinkList<T> GetSingleLinked()
    {
        return new SingleLinked<T>();
    }

    // abstract methods needed to be overriden.
}

public class DoubleLinked<T> : LinkedList<T>
{
    // Override parent's
}

public class SingleLinked<T> : LinkedList<T>
{
    // Override parent's
}

LinkedList<string> singleLinked = LinkedList<string>.GetSingleLinked();

LinkedList<string> doubleLinked = LinkedList<string>.GetDoubleLinked();

public abstract Node<T> GetNode(T data);
public abstract void AddNode(Node<T>);

public Node<T> GetNode(T data) { return new SingleNode<T>(data); }

public Node<T> GetNode(T data) { return new DoubleNode<T>(data); }

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The apostle Paul, modernly speaking: Epistles of Paul

Judah Himango

Tom Wright wrote:

However CD-ROMs will be around for quite a while and since I never said that all machine have them, there are the select few who do not order them with their machines. Heck I even had a PC that had no floppy, harddrive, or CD-ROM. It had a boot ROM on the network card and booted from a boot file on the network. That was back awhile. No sure if they still do that.