Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Explain Subclasses and Polymorphism ?
Car and Motorcycle are subclasses of MotorVehicle. If you instantiate a Car or a Motorcycle along with new, you can use in which object anywhere you can use a MotorVehicle, since cars are motor vehicles. As same you can use a Motorcycle anywhere you can use a MotorVehicle. This use of a subclass object in place of a superclass object is the starting of polymorphism. I'll say more about polymorphism later.
The converse is not true. While all cars are motor vehicles, not all motor vehicles are cars. A few are motorcycles. Thus if a method expects a Car object you shouldn't provides it a MotorVehicle object instead.
Remember that I said you shouldn't provide a method in which expects a Car a MotorVehicle. I didn't say you couldn't. Objects can be cast into their subclasses. This is useful while using data structures like Vectors that only handle generic objects. It's up to the programmer to remain track of what kind of object is stored in a Vector, and to use it accordingly.
The proper choice of classes and subclasses is a skill learned primarily by experience. There are often different ways to define classes.toString() as example of polymorphism
1. Arrays and working with arrays
Question 1 Discuss features of JAVA Question 2 What are primitive data types? Discuss Question 3 Explain data conversion function ValueOf ()? Question 4 What are th
My name is Myers, the project director of an online business that is scheduled to commence this summer in Nigeria. We are in the process of recruiting members to the project team a
Struts is depend on model 2 MVC (Model-View-Controller) architecture. Struts controller uses the command design pattern and the action classes use the adapter design pattern. The p
In this lab, you will practice using ArrayLists in two ways. The first is in the problem domain class Question.java (see the UML diagram shown below) which contains data for trivi
For what purposes FTP is used in networks? FTP is known as file transfer protocol it is basically used to download or upload files / data to a remote computer.
The benefits of Spring are as follows: ? Spring has layered architecture. Use what you require and leave you don't require now. ? Spring Enables POJO Programming. There is no
the multiple of two number in java
Component classes generally move the task of generating output to the renderer. All JSF components follow it. Render kit is a set of related renderers. javax.faces.render.RenderKit
What is constructor chaining and how is it achieved in Java? A child object constructor always first requires to construct its parent (which in turn calls its parent constructo
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd