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
Write a Java ADB client to perform the following- The client will read the contents of the file - invoice.txt. The first line of the file will display the type of the currency. The
A NEW Dynamic Website I have the subsequent requirement which needs to be designed in 30 days (Max). 1) Construct a website which is a dynamic, means allow me to change conte
Implement the Money class discussed in class. This class should represent a dollar and cents amount with 0-99 cents and the cents being the same sign as the dollars. The class shou
Describe the Four Levels of Access Protection ? Any two various Java objects have one of four relations to each other. The four relations are: • The objects are in the simila
What is JavaServer Faces navigation model? Ans) A mechanism for describing the sequence in which pages in a JavaServer Faces application are shown.
Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b
how android applications are made using java.?
I want to learn java
I have a GUI assignment due Friday noon and i can''t get my hand on it will anyone be able to solve it to me and what is the cost?
onstraints: 1 1 1 1 0 1 1 1
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