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 do you think about an object's lock and which kinds of object's have locks?
Object diagrams define instances instead of classes. They are useful for illustrating some complicated objects in detail about their recursive relationships. When
Socket and ServerSocket. ServerSocket is used for normal two-way socket communication. Socket class permits us to read and write by the sockets. getInputStream() and getOutputStrea
I want a Script developer who will make script for me and if you can show good works there are bonuses too. Skills required are Facebook Marketing, Java, Javascript, PHP, and Sc
Write JavaScript code to convert the number 236.2363611111556 into currency format and JavaScript statement to show output? Var input_amt = 236.2363611111556 ; mid_data = input
Describe The ? operator in Java langauge? The conditional operator just works for assigning a value to a variable, using a value within a method invocation, or in a few other w
This assignment requires you to design, implement and test a program using Java features from the first half of the subject content. You are required to implement in Java all the c
Problem statement Part 1 Write an aspect that counts different kinds of method calls in a Java program. Your aspect should meet the following requirements: The aspect should ma
Create an object model for the Solar System using the following link: Provide">http://airandspace.si.edu/etp/ss/index.htm Provide an abstract class called Planet and a concrete s
JMS consumer is a JMS client that receives messages.
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