[PDF] an abstract class can be final

If you declare a class abstract, to use it, you must extend it and if you declare a class final you cannot extend it, since both contradict with each other you cannot declare a class both abstract and final if you do so a compile time error will be generated.
View PDF Document


  • Can abstract class be static or final?

    Abstract classes are similar to interfaces.
    You cannot instantiate them, and they may contain a mix of methods declared with or without an implementation.
    However, with abstract classes, you can declare fields that are not static and final, and define public, protected, and private concrete methods.

  • Can an abstract method be a final method?

    Yes, an abstract class have final methods in java but the final method cannot be abstract.

  • Can an abstract method be a final method?

    Because if a class is defined final it cannot be overridden .
    But if you create an abstract class then it should be overridden by the subclass .
    Hence an abstract class cannot be final.25 nov. 2016

View PDF Document




Chapter 11: Polymorphism

An abstract class provides a superclass from which other classes can A final method in a superclass cannot be overridden in a subclass. You.



Class 13: Inheritance and Interfaces - Introduction to Computation

We can make Person an abstract class: Person and must use this implementation: final method …}; class ... (Class can have abstract final or no keyword).



MODULE III QUESTIONS SOLUTION 1. Explain the constructor

Though a final class cannot be extended it can extend other classes. In simpler It can have abstract and non-abstract methods (method with body).



Faithful Companion

Is that only difference between an interface and an abstract class? It can have Constructor as well. The final modifier applies to classes methods



Using Abstract Classes

13 sept. 2019 an abstract class cannot be directly instantiated with the new operator ... When a small final method is called often the Java compiler can ...



CMSC 132: OBJECT-ORIENTED PROGRAMMING II

Abstract methods cannot be final. • Since must be overridden by descendent class (final would prevent this). • A non-abstract method of an abstract class 



Abstract Class

?Similar to a class. ?Consists of only abstract methods and final variables. ?Any number of classes can implement an interface. ?One class can implement 



Abstract class and Interface in Java

An abstract class can have data member abstract method



Abstract Static and Final Announcement Agenda

24 juil. 2008 Among the methods used in the 7-22 lab which method(s) can be generic? 11. Abstract Class in Java. • A class is made abstract by declaring it ...



Classes in Java

A concrete class can inherit from an abstract class. ? A concrete class can be instantiated It is good practice to define all classes as final classes.