Question

Write an application TestBook that creates two Book objects with the following specifications:

book1: pages -> user input

book2: pages -> a random integer between 200-300, inclusive

The application prints to the screen the average number of pages of the two books. It then creates a third book object with number of pages equal to the sum of the number of pages of the previous two books and prints to the screen the information about that third book, i.e. toString() method.

Show how to do this toString method for this

Java

Answer 1

SOURCE CODE:

import java.util.Random; //importing random for random number generation
import java.util.Scanner;

class Book //Book class
{
   int pages; //pages instance variable
  
   public String toString() //toString() method
   {
       return " contains "+pages+" Pages.";
      
   }
}
public class TestBook {

   public static void main(String[] args) {
       Scanner sc=new Scanner(System.in); //creating Scanner object
       Book book1=new Book(); //Creating book1
       System.out.println("Enter the Number of pages in Book1: ");
       book1.pages=sc.nextInt(); //reading book1 pages from user and storing in book1.pages
       Book book2=new Book(); //creating book2
       Random rand=new Random(); //creating Random object
       int rand_number=rand.nextInt((300-200)+1)+200; //generating random number (200-300)
       book2.pages=rand_number; //adding random number to book2.pages
      
       float Avg_pages=(book1.pages+book2.pages)/(float)2; //calculating average books
       System.out.println("The average number of pages of two books: "+Avg_pages); //printing avg_pages
      
       Book book3=new Book(); //creating book3
       book3.pages=(book1.pages+book2.pages); //sum of book1 and book2 pages to book3.pages
      
       System.out.println("Book3 "+book3.toString()); //calling toString() method on book3

   }

}

CODE SCREENSHOT:

OUTPUT: