Question

. Create a class called Book to represent a book. A Book should include four pieces of information as instance variables‐a book name, an ISBN number, an author name and a publisher. Your class should have a constructor that initializes the four instance variables. Provide a mutator method and accessor method (query method) for each instance variable. Inaddition, provide a method named getBookInfo that returns the description of the book as a String (the description should include all the information about the book). You should use this keyword in member methods and constructor. Write a test application named BookTest to create an array of object for 30 elements for class Book to demonstrate the class Book's capabilities.

Answer 1

CODE IN JAVA:

Book.java file:

public class Book {
  
   private String bookName ;
   private String ISBNNumber ;
   private String authorName ;
   private String publisher ;
   public Book(String bookName, String iSBNNumber, String authorName, String publisher) {
      
       this.bookName = bookName;
       ISBNNumber = iSBNNumber;
       this.authorName = authorName;
       this.publisher = publisher;
   }
   public String getBookName() {
       return bookName;
   }
   public void setBookName(String bookName) {
       this.bookName = bookName;
   }
   public String getISBNNumber() {
       return ISBNNumber;
   }
   public void setISBNNumber(String iSBNNumber) {
       ISBNNumber = iSBNNumber;
   }
   public String getAuthorName() {
       return authorName;
   }
   public void setAuthorName(String authorName) {
       this.authorName = authorName;
   }
   public String getPublisher() {
       return publisher;
   }
   public void setPublisher(String publisher) {
       this.publisher = publisher;
   }
  
   public String getBookInfo() {
       return "Book [bookName=" + bookName + ", ISBNNumber=" + ISBNNumber + ", authorName=" + authorName
               + ", publisher=" + publisher + "]";
   }
  
  
}

TestBook.java file:

import java.util.Scanner ;
public class TestBook {

   public static void main(String[] args) {
      
       Scanner sc = new Scanner(System.in);
       System.out.print("Enter book name : ");
       String book = sc.nextLine();
       System.out.print("Enter ISBN number : ");
       String ISBN = sc.nextLine();
       System.out.print("Enter author name : ");
       String author = sc.nextLine();
       System.out.print("Enter publisher : ");
       String publisher = sc.nextLine();
       Book b = new Book(book, ISBN, author, publisher);
       System.out.println(b.getBookInfo());

   }

}

OUTPUT: