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In: Computer Science

risks involved with using the protected member access specifier instead of the private member access specifier?

risks involved with using the protected member access specifier instead of the private member access specifier?

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Expert Solution

Explanation:

A private member access specifier is only accessible within the same class as it is declared.

A protected member access specifier is accessible within all classes in the same package and within sub classes in other packages.

Risks involved with using the protected member access specifier instead of the private member access specifier:

  1. A protected member access specifier is "visible" to sub classes and protected members can be seen by all sub classes and all classes that are in the same package. This makes it much harder to later change the field because more classes might be referencing it.
  2. A sub class can use them and may break if you happen to change protected members due to evolution of your class or change in requirements.
  3. A sub class can extend the protected members and make it exposed to the outside (public) world
  4. No such risk in case of private members as private members can only be seen by its own class (and inner classes).

The following table depicts the

  Class
 
  Package
 
  Subclass

(same pkg)

 
  Subclass

(diff pkg)

 
  World
 
  protected
 + + + + 
  private
 + 
   + : accessible         blank : not accessible

venereology answered 2 weeks ago
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