Protected members in a class are similar to private members as they cannot be accessed from outside the class. But they can be accessed by derived classes or child classes while private members cannot.
Can protected members access private members?
Only the member functions or the friend functions are allowed to access the private data members of a class. The class member declared as Protected are inaccessible outside the class but they can be accessed by any subclass(derived class) of that class.
How can I access protected class members?
Protected members that are also declared as static are accessible to any friend or member function of a derived class. Protected members that are not declared as static are accessible to friends and member functions in a derived class only through a pointer to, reference to, or object of the derived class.
Can objects of a class access protected members?
8 Answers. A class can only access protected members of instances of this class or a derived class. It cannot access protected members of instances of a parent class or cousin class. In your case, the Derived class can only access the b protected member of Derived instances, not that of Base instances.
How do you access protected methods outside a class?
Example 2
- class A {
- protected String msg=”Try to access the protected variable outside the class within the package”;
- }
- public class ProtectedExample2 {
- public static void main(String[] args) {
- A a=new A();
- System.out.println(a.msg);
- }
What is the difference between protected and private members?
The private modifier specifies that the member can only be accessed in its own class. The protected modifier specifies that the member can only be accessed within its own package (as with package-private) and, in addition, by a subclass of its class in another package.
Who can access protected members C++?
A class in C++ has public, private and protected sections which contain the corresponding class members. Protected members in a class are similar to private members as they cannot be accessed from outside the class. But they can be accessed by derived classes or child classes while private members cannot.
Why do we use protected visibility specifier to a class member?
Protected variables allow access to the variables only from sub-classes and classes within the same package. Protected variables can be useful if you want your data to be read-only, or when you want to abstract your data. However, you can just use private variables with getters and setters methods.
Which members of class Cannot be inherited?
Explanation: Private members of a class can’t be inherited. These members can only be accessible from members of its own class only. It is used to secure the data. 4.
What are the protected members inheritance?
Protected Inheritance − When deriving from a protected base class, public and protected members of the base class become protected members of the derived class. Private Inheritance − When deriving from a private base class, public and protected members of the base class become private members of the derived class.
Who can access protected?
2. The protected Keyword. While elements declared as private can be accessed only by the class in which they’re declared, the protected keyword allows access from sub-classes and members of the same package.
How do I access protected variables?
Basically, the protected keyword is an access modifier for method and variable of a class. When a method or a variable is marked as protected, it can be accessed from: Within the enclosing class. Other classes in the same package as the enclosing class.
Can protected members be accessed by objects C++?
You can only access protected members in instances of your type (or derived from your type). You cannot access protected members of an instance of a parent or cousin type. In your case, the Derived class can only access the b member of a Derived instance, not of a different Base instance.