a true or false statement

[adam Lui]

A has-a relationship can be established by using ojbect reference variables a as local variables.


true or false. Why?
[ October 19, 2007: Message edited by: adam lui ]

[palla sridhar]

Hi Adam!
It was a nice question to ask. As far as i know, if a class contains object reference variable as instance variable, then that's a HAS-A relatinship. For example:

class Animal {
private Dog dog; }   

means Animal HAS-A Dog.

If you also check K&B, there is also an example like this:

  public class Horse extends Animal {
   private Halter myHalter;
   public void tie(LeadRope rope) {
      myHalter.tie(rope);  // Delegate tie behavior to the
                           // Halter object
   }
}
public class Halter {
   public void tie(LeadRope aRope) {
      // Do the actual tie work here
   }
}
 
  

.
The book says that

Users of a Horse should not even need to know that there is such a thing as a Halter class.

So if you go by this explantion, users of a class dont even need to know that there is a local object reference variable, which implies that local object reference variables also follow HAS-A relationship.

So my answer is TRUE and for why? above is the explanation..
This is what i think, anybody please correct me if i'm wrong!!

[Rahul Shilpakar]

yes its true