public class SpecialRefs {
   public static void main(String[] args) {
 
      Person p1,p2; // current value?
      p1 = new Person("Dimmu",null);
      p2 = new Person("Borgir",null);
      p1.setFriend(p2.getMe());
      p2.setFriend(p1.getMe());
      System.out.println(p1);
      System.out.println(p2);
   }
}

class Person {
   private String me; // value?
   private String friend; // value?
   public Person(String me, String friend) {
      this.me = me;
      this.friend = friend;
   }
   public void setFriend(String friend) {
      this.friend = friend;
   }
   public String getMe() {
      return me;
   }
   public String toString() {
      return "I am "+me+", and my friend is "+friend+".";
   }
}