Why and when do we use protected instead of private?

– Private data members cannot be accessed outside the class. – When a class inherits a base class, all the data members except the private get inherited into it. So if we want data members to be accessible to only derived classes and not privately or publicly accessible, then we can use protected.

When should you use protected vs private?

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.

Why do we need to use protected access modifier instead of private?

Private members and attributes are completely hidden from outside classes as well as from subclasses. Protected access hides the class’s methods and attributes from classes that exist outside of the class’s package. This means that classes within the same package can access protected methods and attributes.

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What is the difference between private and protected?

Private = only members of the same class can access the function. Protected = Same as private but derived classes can also access.

Why is private over protected?

A decision to make a member of a class which is given to other programmers private or protected implies a decision as to which type of potential future need will be provided for, and will make it difficult to provide for the other.

When should we use protected in Java?

Use it when you need to do some internal stuff that is not exposed in public API but still needs to be overriden by subclasses. You need to use the protected access modifier, when you want the descendant class to see the fields / methods of the super class, BUT you do not want other classes to see these.

Why protected is bad?

Answer: The Issues (135 Votes)

Protected variables should be avoided because: … Protected variables generally have some intrinsic invariance associated with them (or else they’d be public). Inheritors then need to maintain those properties, which people can screw up or willfully violate.

Why do we need protected access specifier?

The protected keyword specifies access to class members in the member-list up to the next access specifier ( public or private ) or the end of the class definition. Class members declared as protected can be used only by the following: … Direct privately derived classes that also have private access to protected members.

What is the difference between protected and default access modifier?

The protected specifier allows access by all subclasses of the class in question, whatever package they reside in, as well as to other code in the same package. The default specifier allows access by other code in the same package, but not by code that is in subclasses residing in different packages.

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What is difference between protected and private access specifiers in inheritance Mcq?

Both are inheritable but private is accessible in the derived class. D. Both are inheritable but protected is not accessible in the derived class. Explanation: Protected member is inheritable and also accessible in derived class is the difference between protected and private access specifiers in inheritance.

What’s the difference between a protected method and a private method?

Protected methods are accessible from objects of the same class or even children, which is not the case for a private method. Private methods are normally accessible from objects of child classes, as long as they are invoked with implicit receivers (that is, without any dot on their left side).

What’s the difference between public and protected?

The difference between public and protected is that public can be accessed from outside class but protected cannot be accessed from outside class.

What is the difference between public protected and private in a class definition?

Broadly speaking, public means everyone is allowed to access, private means that only members of the same class are allowed to access, and protected means that members of subclasses are also allowed. However, each language adds its own things to this.

What does private protected mean?

The private protected keyword combination is a member access modifier. A private protected member is accessible by types derived from the containing class, but only within its containing assembly. For a comparison of private protected with the other access modifiers, see Accessibility Levels.

Is protected package private?

private hides from other classes within the package. public exposes to classes outside the package. protected is a version of public restricted only to subclasses.

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When should a method be protected?

The best time to create a method under the protected heading is when you want to compare and/or transfer data between objects of the same class, but you don’t want that information to be made public.