and a base Book class, define a derived class called Encyclopedia
OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
Given main() and a base Book class, define a derived class called Encyclopedia with member methods to get and set private fields of the following types:
- String to store the edition
- int to store the number of pages
Within the derived Encyclopedia class, define a printInfo() method that overrides the Book class' printInfo() method by printing the title, author, publisher, publication date, edition, and number of pages.
Ex. If the input is:
The Hobbit J. R. R. Tolkien George Allen & Unwin 21 September 1937 The Illustrated Encyclopedia of the Universe Ian Ridpath Watson-Guptill 2001 2nd 384
the output is:
Book Information: Book Title: The Hobbit Author: J. R. R. Tolkien Publisher: George Allen & Unwin Publication Date: 21 September 1937 Book Information: Book Title: The Illustrated Encyclopedia of the Universe Author: Ian Ridpath Publisher: Watson-Guptill Publication Date: 2001 Edition: 2nd Number of Pages: 384
BookInformation.java
import java.util.Scanner;
public class BookInformation {
public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
Book myBook = new Book();
Encyclopedia myEncyclopedia = new Encyclopedia();
String title, author, publisher, publicationDate;
String eTitle, eAuthor, ePublisher, ePublicationDate, edition;
int numPages;
title = scnr.nextLine();
author = scnr.nextLine();
publisher = scnr.nextLine();
publicationDate = scnr.nextLine();
eTitle = scnr.nextLine();
eAuthor = scnr.nextLine();
ePublisher = scnr.nextLine();
ePublicationDate = scnr.nextLine();
edition = scnr.nextLine();
numPages = scnr.nextInt();
myBook.setTitle(title);
myBook.setAuthor(author);
myBook.setPublisher(publisher);
myBook.setPublicationDate(publicationDate);
myBook.printInfo();
myEncyclopedia.setTitle(eTitle);
myEncyclopedia.setAuthor(eAuthor);
myEncyclopedia.setPublisher(ePublisher);
myEncyclopedia.setPublicationDate(ePublicationDate);
myEncyclopedia.setEdition(edition);
myEncyclopedia.setNumPages(numPages);
myEncyclopedia.printInfo();
}
}
Book.java
public class Book {
protected String title;
protected String author;
protected String publisher;
protected String publicationDate;
public void setTitle(String userTitle) {
title = userTitle;
}
public String getTitle() {
return title;
}
public void setAuthor(String userAuthor) {
author = userAuthor;
}
public String getAuthor(){
return author;
}
public void setPublisher(String userPublisher) {
publisher = userPublisher;
}
public String getPublisher() {
return publisher;
}
public void setPublicationDate(String userPublicationDate) {
publicationDate = userPublicationDate;
}
public String getPublicationDate() {
return publicationDate;
}
public void printInfo() {
System.out.println("Book Information: ");
System.out.println(" Book Title: " + title);
System.out.println(" Author: " + author);
System.out.println(" Publisher: " + publisher);
System.out.println(" Publication Date: " + publicationDate);
}
}
Encyclopedia.java
public class Encyclopedia extends Book {
// TODO: Declare private fields
// TODO: Define mutator methods -
// setEdition(), setNumPages()
// TODO: Define accessor methods -
// getEdition(), getNumPages()
// TODO: Define a printInfo() method that overrides
// the printInfo in Book class
}
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