public class Edge implements Comparable
{
   // instance variables

   public Edge ( int first, int second, int weight )

   public int vertexOne ( )
   // post:  returns first vertex (from vertex) as an int

   public int vertexTwo ( )
   // post:  returns second vertex (to vertex) as an int

   public int edgeWeight ( )
   // post:  returns edge weight as an int

   public int compareTo ( Object other )

}