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
An Action Class performs a role of an adapter among the contents of an incoming HTTP request and the corresponding business logic that should be implemented to process this request
You are required to design & implement online food delivery system using Java RMI technology. This involves writing both the server and the client program(s). Client programs can u
What is Scope of Variable ? Space in that a variable is effective is called as the scope of a variable. In other words we can say area where that variable is available for the
How to Implementing the Cloneable Interface The java.lang.Object class contains a clone() method which returns a bitwise copy of the current object. protected native Object cl
Need support Display TIFF in Internet Explorer without ActiveX plugin I would like to get a client side viewer designed that permits user to view TIFF files on IE 8 and IE 9 bro
Iterate through list of Fish. For each fish that isAlive, do the following: * * 1. If this fishIsSurroundedByRocks, DO NOTHING, and move on to the next fish. * (This f
1. The spring container searches the bean's definition from the XML file and instantiates the bean. 2. Using the dependency injection, spring populates all of the properties as
In JavaScript, what is event handling? What are the two categories of events? In java script we could capture events on do a few operation on the basis of which particular even
Please can you write some codes and their functions too. At least 10! Please
The Spring container is able to autowire relationships among collaborating beans. This means that it is possible to automatically let Spring resolve collaborators (other beans) for
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