Dec 16, 2009 · Abstract class. Abstract class contains abstract and non-abstract methods. Does not force users to implement all methods when inherited the abstract class. Contains all kinds …

Use an abstract class. When creating a class library which will be widely distributed or reused—especially to clients, use an abstract class in preference to an interface; because, it …

Jan 26, 2009 · Abstract classes may also provide members that have already been implemented. Therefore, you can ensure a certain amount of identical functionality with an abstract class, but …

Main things of abstract class. An abstract class may or may not contain abstract methods.There can be non abstract methods. An abstract method is a method that is declared without an …

Nov 8, 2016 · By comparison, abstract classes are most commonly subclassed to share pieces of implementation. A single abstract class is subclassed by similar classes that have a lot in …

Abstract class vs interface. An abstract class allows you define a basic functionality leaving undefined parts. An interface doesn't allow you to implement anything. You can program …

Nov 9, 2011 · The point of an abstract class is to define (restrict) your interface, without describing the implementation. An abstract class can be instantiated by constructing a compatible object …

The abstract test class of Car: abstract class CarTest { // the factory method abstract Car createCar(int speed, int fuel); // all test methods need to make use of the factory method to …

Apr 6, 2012 · The shortest answer is, extend abstract class when some of the functionalities uou seek are already implemented in it. If you implement the interface you have to implement all …

Oct 11, 2011 · I understand what an abstract class is in OOP paradigm. Yeah an abstract class is an incomplete type, cannot be instantiated. Subclasses of the abstract class can extend the …