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
What is a variable in Java program? It's a memory location. Memory location is given some name. Memory location is being assigned some value. Value may change o
eAgro Portal Project: Technology Used: Java Server Faces, JSR 168 Specification, Websphere Portal Server5.0, DB2 database And Rational Application Developer, Jasper Report Too
We need a Java Developer a) Having 4.6 years of I.T experience Java, J2EE, spring, Hibernate, JSF, Swings. b) Analyze, identifying and understanding the client requirements a
Write a JSP to display a table that contains factorials for the numbers from 0 to 10,
What is the problem along with Relational Database and what solution you could suggest for it? When we store object orientated data within RDBMS it required to translate in to
Why should we, as computing professionals, be interested within studying the social implications of our creations? This is important Because of remaining the track of money wis
What is casting? There are two types of casting, casting among primitive numeric types and casting among object references. Casting among numeric types is used to convert large
Want simple functional website without any graphic work, like panel Project Description: I want a very simple look website .It should be like a panel. Few tab, contact form,
write an application that stores at least five different department and supervisor names in a two dimensional array
What is the role of fonts in java explain with example? You've already seen one instance of drawing text in the HelloWorldApplet program of the last chapter. You call the drawS
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