Quick Answer: What is the use of protected method in Java?

Protecting a constructor prevents the users from creating the instance of the class, outside the package. During overriding, when a variable or method is protected, it can be overridden to other subclass using either a public or protected modifier only.

What is the use of protected methods?

A primary usage of protected methods is when a class expects its derived classes to override the method with its own features, and also call the base class version. E.g. You should always encapsulate your code to restrict access to the meet the exact level of access needed.

What is protected method in Java?

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.

What is protected method?

A protected method is like a private method in that it can only be invoked from within the implementation of a class or its subclasses. It differs from a private method in that it may be explicitly invoked on any instance of the class, and it is not restricted to implicit invocation on self .

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What is the use of 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: Member functions of the class that originally declared these members.

Can we use protected for a class in Java?

No, we cannot declare a top-level class as private or protected. It can be either public or default (no modifier).

Should I use private or protected?

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.

Are protected methods Final?

Thanks. A protected method is inherited, and can be invoked from, a subclass. The way I see it, the design decision behind making a method both protected and final is: final, so the implementation cannot be changed, and protected, so that it cannot be called from anywhere outside the inheritance hierarchy.

Can we override protected method in Java?

Yes, the protected method of a superclass can be overridden by a subclass. If the superclass method is protected, the subclass overridden method can have protected or public (but not default or private) which means the subclass overridden method can not have a weaker access specifier.

What is protected keyword?

Protected keywords are keywords that are used to restrict the scope within which the variable, method, and constructors can be accessed. It is one of the types of access modifiers in Java. They are used to differentiate between the scope of methods, variables, constructors, and classes.

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What is difference between protected and default in Java?

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.

What is protected class in Java?

The protected keyword is an access modifier used for attributes, methods and constructors, making them accessible in the same package and subclasses.

Why we use protected private and public access specifiers?

C++ access specifiers are used for determining or setting the boundary for the availability of class members (data members and member functions) beyond that class. For example, the class members are grouped into sections, private protected and public .

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.