// we have this class in the file NumNode.java

public class NumNode  

{  // by making Nodes variable static, it will be "global" to all
   // instances of the class
   private static NumNode Nodes = null; 

   // the rest of these variables are "local" to each instance of the
   // class

   // valued stored in this node
   int Value;

   // "pointer" to next item in list; make available outside this class
   NumNode Next;

   // constructor
   public NumNode(int V)  {
      Value = V;
      Next = null;
   }

   // make the following methods visible externally, e.g. to main(), via
   // public; the ones which are class methods rather than instance
   // methods also are static

   public static NumNode Head()  {
         return Nodes;
   }

   public void Insert()  {
      if (Nodes == null)  {
         Nodes = this;  
         return;
      }
      if (Value < Nodes.Value)  {
         Next = Nodes;
         Nodes = this;
         return;
      }
      else if (Nodes.Next == null)  {
         Nodes.Next = this;
         return;
      }
      for (NumNode N = Nodes; N.Next != null; N = N.Next)  {
         if (Value < N.Next.Value)  {
            Next = N.Next;
            N.Next = this;
            return;
         }
         else if (N.Next.Next == null)  {
            N.Next.Next = this;
            return;
         }
      }
   }

   public static void PrintList()  {
      if (Nodes == null) return;
      for (NumNode N = Nodes; N != null; N = N.Next)  
         System.out.println(N.Value);
   }

}