How do you use protected class?

What is the use of protected class 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. Outer class and interface cannot be protected.

How can we access protected class method?

Example 2

  1. class A {
  2. protected String msg=”Try to access the protected variable outside the class within the package”;
  3. }
  4. public class ProtectedExample2 {
  5. public static void main(String[] args) {
  6. A a=new A();
  7. System.out.println(a.msg);
  8. }

Can we use protected in class?

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

How can we access protected and private members of a class?

Protected members can only be accessed by descendants of the class, and by code in the same module. Private members can only be accessed by the class they’re declared in, and by code in the same module.

Can we inherit private method in Java?

Yes. A java private member cannot be inherited as it is available only to the declared java class. Since the private members cannot be inherited, there is no place for discussion on java runtime overloading or java overriding (polymorphism) features.

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Can we override static method?

Static methods cannot be overridden because they are not dispatched on the object instance at runtime. The compiler decides which method gets called. Static methods can be overloaded (meaning that you can have the same method name for several methods as long as they have different parameter types).

How do I access protected 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.

Are protected methods Final?

1) Private methods are final. 2) Protected members are accessible within a package and inherited classes outside the package. 3) Protected methods are final. 4) We cannot override private methods.

Is it possible to access data outside a class?

Yes, you can access data members and functions outside of the class by the help of public and protected access specifiers.

What is difference between public and protected?

Difference between Public and Protected

The data members and member functions declared public can be accessed by other classes too. The class member declared as Protected are inaccessible outside the class but they can be accessed by any subclass(derived class) of that class.

Can a class be final?

You can declare some or all of a class’s methods final. You use the final keyword in a method declaration to indicate that the method cannot be overridden by subclasses. The Object class does this—a number of its methods are final . … A class that is declared final cannot be subclassed.

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Can constructor be private?

Yes. Class can have private constructor. Even abstract class can have private constructor. By making constructor private, we prevent the class from being instantiated as well as subclassing of that class.