An OOP model idea required

Question

hi all,
I have a requirement.
There will be two independent classes. A and B.
There will be two instances oA and oB.
I have to link an instance of oA as its created to an instance of oB.
I did this by creating instance oB in Class A's constructor..
But theres another requirement, that some methods in class B will
need to use values of variables in class A.
meaning,
an instance of A will need an instance of B for the corresponding instance
of A,
and the instance of B will use A's instance variables, or viceversa.
public oB.something(oA){
oB.n1= oA.t1 + oA.t2
I have currently done the above..
Is it ok. is it a cyclic ref.
whats your suggestion?
Thanks
'Harish

Answer 1

So those two classes A and B aren't so independent after all, i.e. objects of both classes need to be
paired (or linked) to each other. How about this -- public class A {
   private B that;
   public A() { this(null); }
   public A(B b) { link(b); }
   public void link(B that) {
      if (this.that != that) {
         this.that= that;
         if (that != null) that.link(this);
public class B {
   private A that;
   public B() { this(null); }
   public B(A a) { link(a); }
   public void link(A that) {
      if (this.that != that) {
         this.that= that;
         if (that != null) that.link(this);
} kind regards,
Jos