Thread: null pointer in a linked list

I've been having some "fun" with my program Im making for a class im taking. I thought I handled all of the null pointers correctly but I guess not, heres what I currently have.

public class LinkedList
{
   private LinkedListNode first;       //holds the first/head of the list
   private LinkedListNode last;        //holds the last/tail of the list
   private LinkedListNode current;     //holds the current node you are at
 
 
//List constructor
   public LinkedList()
   {
      first    = null;                 //creates the list with no head
      last     = null;                 //creates the list with no tail
      current  = first;                //starts you at the head
   }
//Linked list node class
   public class LinkedListNode
   {
      private Object info;              //the information in the node
      private LinkedListNode next;  //a node that points to the next in the list
 
      public LinkedListNode()
      {
         next = null;                     //always creates the first node pointing to nothing
      }
   }
   public void insertFirst(Object new_info)
   {
      LinkedListNode temp = new LinkedListNode();
      temp.info = new_info;
      if(first == null)
      {
         temp = first;
         temp = last;
      }
      else
      {
         temp.next = first;
         temp = first;
      }
   }

I have some experience in C++ dealing with pointers, am I coding in C++ with out realizing it?

--- Update ---

Wait found part of the problem, found the issue in the insertFirst method... the head and tail werent being set correctly, i was effectively deleting the node i was inserting. I just got the current node to work properly now