Regarding "HAS A" Relationship

night sailor

Hi,

I have one doubt regarding understanding of "HAS-A" relationship between classes.
Consider i have two classes : Employee and Address. Now, i want to know when "HAS-A" relation will be implemented?

1) When i am simply creating member in Employee class like :
        private Address empAddress ;
        public Address _Address
        {
             get{}
             set{}
        }

2) when i am creating whole Address class inside Employee class as Nested class.

Thanks,
Himanshu

2 Replies

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Vulpes15y ago
Basically, two classes A and B are said to have a "HAS-A" relationship if an object of Class A contains an object of Class B.

Thus, if the Employee class has an instance field of type Address, then Employee and Address have an HAS-A relationship.

So, in other words, your first scenario implements an HAS-A relation.

In your second scenario, when Address is a nested class of Employee, then technically Address is a static member of Employee which isn't the same thing as one object containing another.
Dorababu Meka15y ago
You have to create in Employee as if employee exists then only you can have his address