Question

In Java

Create an interface Create an interface Printing, which have a method getPageNumber () that return page number of any printing.

Create an abstract class named Novel that implements Printing. Include a String field for the novel's title and a double field for the novel price. Within the class, include a constructor that requires the novel title, and add two get methods--one that returns the title and one that returns the price. Include an abstract method named setPrice().. Create two child classes of Novel: Fiction and NonFiction. Each must include a setPrice() method that sets the price for all Fiction Novel at 89.90 SAR and for all NonFiction Novels at $124.50 SAR. Write a constructor for each subclass, and include a call to setPrice() within each. Write an application demonstrating that you can create both a Fiction and NonFiction Novel and display their fields. Save the fields as Novel.java, Fiction.java, NonFiction.java, and UseNovel.java.

Write an application named NovelArray in which you create an array that holds 8 Novels, some Fiction and some NonFiction. Using a for loop, display details about all 8 novels. Save the file as NovelArray.java.

Answer 1

If you have any problem with the code feel free to comment.

Printing

public interface Printing {
  
   public int getPageNumber();

}

Novel

public abstract class Novel implements Printing {

   protected String title;
   protected double price;

   public Novel(String title) {
       this.title = title;
   }

   public String getTitle() {
       return title;
   }

   public double getPrice() {
       return price;
   }

   abstract public void setPrice();

}

Fiction

public class Fiction extends Novel {

  
   public Fiction(String title) {
       super(title);
       setPrice();
   }

   @Override
   public int getPageNumber() {
       // TODO Auto-generated method stub
       return 0;
   }

   @Override
   public void setPrice() {
       price = 89.90;
   }

}

NonFiction

public class NonFiction extends Novel {

   public NonFiction(String title) {
       super(title);
       setPrice();
   }

   @Override
   public int getPageNumber() {
       // TODO Auto-generated method stub
       return 0;
   }

   @Override
   public void setPrice() {
       price = 124.50;
   }
}

UseNovel

public class UseNovel {
   public static void main(String[] args) {
       Fiction fic = new Fiction("Alone");
       NonFiction nonfic = new NonFiction("Im alive");
       System.out.println("Title: "+fic.getTitle()+", Price: $"+fic.getPrice());
       System.out.println("Title: "+nonfic.getTitle()+", Price: $"+nonfic.getPrice());
   }
}

NovelArray

public class NovelArray {
   public static void main(String[] args) {
      
       Novel[] novels = {
               new Fiction("Somthings Wrong!!"),
               new NonFiction("Stupid"),
               new Fiction("Love"),
               new Fiction("Ghost"),
               new NonFiction("Money"),
               new Fiction("Freedom"),
               new NonFiction("Anger"),
               new NonFiction("Greed"),
               new NonFiction("Chemistry")
       };
      
       for(Novel i: novels) {
           System.out.println("Title: "+i.getTitle()+", Price: $"+i.getPrice());
       }
   }
}

Outputs