package linkedchain;

public class LinkedChain {

   private Node head; // Reference to first node
   private int numberOfEntries;

   public static void main(String[] args) {

      LinkedChain chain = new LinkedChain();
      chain.add(10);
      chain.add(-2);
      chain.add(57);
   }

   public LinkedChain() {
      head = null;
      numberOfEntries = 0;
   } // end default constructor

   public void add(int newEntry) {
      // Add to beginning of chain:
      Node newNode = new Node(newEntry);
      newNode.next = head; // Make new node reference rest of chain
      head = newNode; // New node is at beginning of chain
      numberOfEntries++;
   } // end add

   private class Node {
      private int data;
      private Node next; // Link to next node

      private Node(int dataPortion) {
         this(dataPortion, null);
      } // end constructor

      private Node(int dataPortion, Node nextNode) {
         data = dataPortion;
         next = nextNode;
      } // end constructor
   } // end Node
}