// Implementation of a node of a singly linked list.
// (c) 1998 McGraw-Hill
package structure;

public class SinglyLinkedListElement
{
    protected Object data; // value stored in this element
    protected SinglyLinkedListElement nextElement; // ref to next

    public SinglyLinkedListElement(Object v,
                                   SinglyLinkedListElement next)
    // post: constructs a new element with value v,
    //       followed by next element
    {
        data = v;
        nextElement = next;
    }

    public SinglyLinkedListElement(Object v)
    // post: constructs a new tail of a list with value v
    {
        this(v,null);
    }

    public SinglyLinkedListElement next()
    // post: returns reference to next value in list
    {
        return nextElement;
    }

    public void setNext(SinglyLinkedListElement next)
    // post: sets reference to new next value
    {
        nextElement = next;
    }

    public Object value()
    // post: returns value associated with this element
    {
        return data;
    }

    public void setValue(Object value)
    // post: sets value associated with this element
    {
        data = value;
    }

    public String toString()
    // post: returns string representation of element
    {
        return "<SinglyLinkedListElement: "+value()+">";
    }
}