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!
The 'is a' relationship is used with inheritance and 'has a' relationship is used with composition. Both composition and inheritance allow you to perform sub-objects inside your new class. Two of the main techniques for code reuse are object composition and class inheritance.
Inheritance is single-directional. For example man is a human. But human is not a man. Inheritance needs extends key word. Composition: is used when Man has an eye. It is incorrect to say man is an eye. Composition simply defines using instance variables that refer to other objects. The class man will have an instance variable, which refers to an eye object.
Which one to favor, inheritance or composition? The guide is that inheritance could be only used when subclass 'is a' superclass.
1. Don't use inheritance just to get programming code reuse. If there is no 'is a' relationship then require composition for code reuse. Overuse of implementation inheritance will divide all the subclasses, if the superclass is changed.
2. Do not add inheritance just to get polymorphism. If there is no 'is a' relationship and all you need is polymorphism then use interface inheritance with composition, which provides you code reuse.
How can I connect my java application with xampp
It terminates execution of the block of statements in while or for loop & continues execution of the loop along with the next iteration. On the contrary to the break statement, con
OOPS with Java 1. Explain any five buzz words in Java. 2. Explain exception classes and also explain common exceptions in java. 3. Explain primitive and abstract data typ
Describe the Superclass in Inheritance ? In this example you start through defining a more common MotorVehicle class. public class MotorVehicle { private String licensePlat
In the context of this course work, you are asked to write a quality and complexity analysis report by applying programming design and implementation metrics for the AnagramGame Ja
What is the difference between an Interface and an Abstract class? An abstract class can have instance methods that execute a default behavior. An Interface can only declare co
A user interface control that outputs data to a client or permits a user to input data to a JavaServer Faces application.
Write a Java class that generates a random integer (between 1 and 250). Call the class GenKeys. GenKeys should have a least one method that returns the integer random number. Gen K
What is the preferred organizational structure for the organization? Preferred Organizational Structure for organization is hierarchal. Where there is various departments inter
Determine the phase Loading- Java Program Development In phase 3, the program must first be placed in memory before it can be executed. This is done by the class loader, whic
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