Abstract Class Vs Interface With Example

These abstract members should be given the implementation under a child class of an interface.

Abstract class vs interface with example. In c an interface is used to define the outer abilities of a class. Abstract class and interface both cant be instantiated. But for interfaces. A class can be inherited from a class or from an interface.

A class can extend only one abstract class while a class can implement multiple interfaces. Theoretically there are basically 5 differences between abstract class and interface which are listed as below. A class can only inherit from one abstract class. An abstract class is never intended to be instantiated directly.

Probably difference between abstract class and interface is the most frequent question being asked in net world. An abstract class is used to define the actual identity of a class and it is used as the object or the same type. By contrast if you use interfaces you would need to implement all the methods in the class that extends the interface. In this tutorial i will explain the difference theoretically followed by code snippet.

This class must contain at least one abstract method which is marked by the keyword or modifier abstract in the class definitionthe abstract classes are typically used to define a base class in the class hierarchy. In the above example of abstract class we saw that one method was same for all which had a body inside the abstract class and other methods were abstract. An abstract class defines the core identity of a class and there it is used for objects of the same type. But there are many differences between abstract class and interface that are given below.

An abstract class permits you to make functionality that subclasses can implement or override whereas an interface only permits you to state functionality but not to implement it. An abstract class is a way to achieve the abstraction in c. An abstract class is a good choice if you have plans for future expansion. Interfaces are used to define the peripheral abilities of a class.

In other words both human and vehicle can inherit from a imovable interface. In c an interface is used if various implementations only shared method signatures. Interface it is also user defined type like a class which only contains abstract members in it. Simply abstract class achieves partial abstraction 0 to 100 whereas interface achieves fully abstraction 100.