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has-a relationship

 
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Instances must be used when creating a has-a relationship.
is it true ?
 
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HAS-A relationship depends on whether an instance is accessible to another class or not
 
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mohitkumar gupta wrote:Instances must be used when creating a has-a relationship.
is it true ?


I think, there is a confusion in the term. Instance variables are used when creating a HAS-A relationship! But, the instance variable can be null. So, no need of instances! Just a variable declaration can be used!
 
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