Body3.java

public final class Body3  {

   static long nextID = 0;
   long idNum;
   String nameFor;
   Body3 orbits;

   Body3 () {
      idNum = nextID++;
   }

   Body3 (String n) {
      idNum = nextID++;
      nameFor = n;
      orbits = null;
   }

   Body3 (String n, Body3 o) {
      idNum = nextID++;
      nameFor = n;
      orbits = o;
   }

   public static void main (final String[] args)  {

      final Body3 sun   = new Body3 ("Sol");
      final Body3 earth = new Body3 ("Earth", sun);

   }
}