Java: An Introduction to Problem Solving and Programming (8th Edition)
8th Edition
ISBN: 9780134462035
Author: Walter Savitch
Publisher: PEARSON
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Chapter 8.4, Problem 33STQ
Program Plan Intro
“abstract”:
“abstract” is a keyword or modifier, which is used in the case of class and method.
Purpose of “abstract” class:
An “abstract” class is a class which may or may not include abstract methods and cannot be instantiated, but rather can be sub classed or it must serve as a superclass.
The conditions for a class to be considered as legal “abstract” class are mentioned below:
- If a class includes “abstract” methods, then the class must be declared as “abstract”.
- The “abstract” method is declared within the “abstract” class that must be declared without curly braces and followed by a semicolon.
Example of an “abstract” class:
The example of an “abstract” class is mentioned below:
public abstract class GraphicRectangle {
// declare fields
// declare non abstract methods
abstract void drawRectangle();
}
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Chapter 8 Solutions
Java: An Introduction to Problem Solving and Programming (8th Edition)
Ch. 8.1 - Prob. 1STQCh. 8.1 - Suppose the class SportsCar is a derived class of...Ch. 8.1 - Suppose the class SportsCar is a derived class of...Ch. 8.1 - Can a derived class directly access by name a...Ch. 8.1 - Can a derived class directly invoke a private...Ch. 8.1 - Prob. 6STQCh. 8.1 - Suppose s is an object of the class Student. Base...Ch. 8.2 - Give a complete definition of a class called...Ch. 8.2 - Add a constructor to the class Student that sets...Ch. 8.2 - Rewrite the definition of the method writeoutput...
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