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
Project Description: I am seeking someone to prepare a small Android app for a promotional offer. It must be designed for use on an Android tablet. Fundamentally, a user will
Java Is For Real Java has a lot of hype however much of it is deserved. Java is very well matched for many modern problems Using more CPU time and memory but less programmer
What is an abstract class? Abstract class must be extended/subclassed (to be useful). It serves as a template. A class that is abstract may not be instantiated (ie. you may not
Can a human doctor be replaced through an Expert System? Give reasons to support your answer. Expert System is a computer system that simulates the knowledge and expertise of a
Java Program Development and Execution Steps Java program normally go through five phases. These are 1. Edit, 2. Compile, 3. Load, 4. Verify and 5. Execute Co
program to find the frequency of a digit in a number
What is the difference among ForwardAction and IncludeAction? Ans) The difference is that you require to use the IncludeAction only if the action is going to be contained by ano
Project Description: I want to build a camera application for android. By default android will add metadata for the image, for e.g. Date, time, resolution, gps tag etc..In this
1. Arrays and working with arrays
Project Description: I need a Script developer who can make script for me. Need urgently. Skills required: Java, Facebook Marketing, Javascript, PHP, Script Install
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