Table of Contents
Can we have protected methods in abstract class?
Yes, you can declare an abstract method protected. If you do so you can access it from the classes in the same package or from its subclasses.
How can we call a protected method from abstract class?
2 Answers
- Create a new class that extends that abstract class SingleBrowserLocator (you will have to implement the abstract methods in it);
- Search for a non abstract subclass of SingleBrowserLocator that makes that method public or has other public methods that calls the protected one;
What is the purpose of abstraction of class methods?
You want to declare non-static or non-final fields. This enables you to define methods that can access and modify the state of the object to which they belong.
What is protected abstract Java?
Abstract is a programming concept to create a pattern for other classes. protected is an access modifier like public and private. protected variables can be accessed from all classes in your package.
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 .
Can we declare protected method in interface?
Protected members of an interface In general, the protected members can be accessed in the same class or, the class inheriting it. But, we do not inherit an interface we will implement it. Therefore, the members of an interface cannot be protected.
What is protected function?
When you declare a method (function) or a property (variable) as protected , those methods and properties can be accessed by. The same class that declared it. The classes that inherit the above declared class.
What is the difference of abstract method to abstract class?
Abstract is the modifier applicable only for methods and classes but not for variables. Even though we don’t have implementation still we can declare a method with an abstract modifier. That is abstract methods have only declaration but not implementation.
What is the need for abstract classes and abstract methods?
It’s not necessary for an abstract class to have abstract method. We can mark a class as abstract even if it doesn’t declare any abstract methods. If abstract class doesn’t have any method implementation, its better to use interface because java doesn’t support multiple class inheritance.
What is a 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 on a class?
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. A protected method can be used, for example, to define an accessor that allows instances of a class to share internal …
What is the protected keyword used for?
The protected keyword is an access modifier used for attributes, methods and constructors, making them accessible in the same package and subclasses.