Question

Make a class Item with a name and description. Make a class Book that inherits from Item. Add an instance variable, named isbn, of type String. Supply a method toString that prints the book's name, description, and isbn. Supply a test program that tests these classes and methods.

java

Answer 1

Dear Student ,

As per the requirement submitted above , kindly find the below solution.

Here a following java classes are created.

1.Item.java

2.Book.java

3.ItemBookTest.java

Below are details of this class.

1.Item.java

//class Item
public class Item {
   public String name;
   public String description;
}

2.Book.java

//Class Book extends Item
public class Book extends Item {
   //instance variable
   public String isbn;
  
   public String toString()
   {
       //return name, description and isbn
       return "ISBN: "+isbn+"\n Book Name: "+name+"\n Book Description: "+description;          
              
   }
}

3.ItemBookTest.java

import java.util.*;
public class ItemBookTest {
   public static void main(String[] args) {
   //creating object of Scanner class
   Scanner sc=new Scanner(System.in);
   //creating object of Book class
   Book book=new Book();
   //asking user to enter book name
   System.out.print("Enter Book Name :");
   book.name=sc.nextLine();//reading book name
   //asking user to enter description
   System.out.print("Enter Description :");
   book.description=sc.nextLine();//reading description
   //asking user to enter book name
   System.out.print("Enter isbn :");
   book.isbn=sc.nextLine();//reading isbn
   System.out.println("---BOOK DETAILS---");
   //display book details
   System.out.println(book.toString());
   }

}

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Output : Compile and Run above program to get the screen as shown below

Screen 1 :

NOTE : PLEASE FEEL FREE TO PROVIDE FEEDBACK ABOUT THE SOLUTION.