This is a project I am working on. The point of the program is for a user to search for and rate products in a store (Like Yelp but for the grocery store). Product Class is abstract and the two classes, Food and NonFood both extend Product.
The Food Class objects CAN, but don't have to, contain a recipe.
In the TestProject Class I am having a few issues.
1) When I add a product to the Food class and enter type in a recipe, it automatically says "This product does not contain a recipe" even though I entered one.
2) When I add a product, then rate it, then search it, the product's rating does not calculate at all and the recipe file is null.
3) if I search for a product that does not exist, the console does not print out the message I added in the switch case else if statement that states "The product you entered does not exist"
import java.util.ArrayList;
public abstract class Product implements Ratable, Comparable<Product>
{
private String name;
protected double averageRating;
private String image;
ArrayList<Double> ratings = new ArrayList<Double>();
public Product(String name, double averageRating, String image)
{
super();
this.averageRating = averageRating;
this.name = name;
this.image = image;
}
public Product(String name, String image)
{
this.name = name;
this.image = image;
}
public String getName()
{
return name;
}
public double calculateRating(ArrayList<Double> ratings)
{
double sum =0;
if(ratings.size()>0)
{
for(int index =0; index < ratings.size(); index ++)
{
sum+=averageRating;
}
averageRating = sum/ratings.size();
}
return averageRating;
}
public double getRating()
{
return calculateRating(ratings);
}
public String getImage()
{
return image;
}
public void setName(String name)
{
this.name = name;
}
public void setRating(double averageRating)
{
this.averageRating = averageRating;
}
public void setImage(String image)
{
this.image = image;
}
public String toString()
{
return "Product [name=" + getName() + ", rating=" + getRating() + ", image=" + getImage() + "]";
}
}
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
public class Food extends Product
{
private String recipeFile;
public Food(String name, double rating, String image)
{
super(name, rating, image);
}
public Food(String name, String image)
{
super(name, image);
}
@Override
public int compareTo(Product object)
{
if (this.getRating() > object.getRating())
{
return 1;
} else if (this.getRating() < object.getRating())
{
return 1;
} else {
return 0;
}
}
public String getRecipeFile()
{
return recipeFile;
}
public void setRecipeFile(String recipeFile) throws FileNotFoundException
{
File file = new File(recipeFile);
if (!file.exists())
{
throw new FileNotFoundException("This product does not contain a recipe");
}
this.recipeFile=recipeFile;
}
@Override
public String toString()
{
return "Product Name=" + getName() + ", Product Rating=" + getRating()
+ ", Image=" + getImage() + ", Recipes =" + getRecipeFile();
}
@Override
public double calculateRating(ArrayList<Double> ratings)
{
return averageRating;
}
}
import java.util.ArrayList;
public class NonFood extends Product
{
public NonFood(String name, int rating, String image)
{
super(name, rating, image);
}
public NonFood(String name, String image)
{
super(name, image);
}
@Override
public int compareTo(Product object)
{
if (this.getRating() > object.getRating())
{
return 1;
}
else if (this.getRating() < object.getRating())
{
return 1;
}
else
{
return 0;
}
}
@Override
public double calculateRating(ArrayList<Double> ratings)
{
return averageRating;
}
}
import java.util.ArrayList;
public interface Ratable
{
public double calculateRating(ArrayList<Double> ratings);
public double getRating();
}
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;
import java.util.Scanner;
public class TestProject
{
public static void main(String[] args)
{
List<Product> products = new ArrayList<Product>();
Scanner scan = new Scanner(System.in);
boolean isExit = false;
while (!isExit) {
System.out.println("Please make your selection from the following options");
System.out.println("Press 1 : Search for a Product");
System.out.println("Press 2 : Rate a Product");
System.out.println("Press 3 : Compare with other products");
System.out.println("Press 4 : Add Product");
System.out.println("Press 5 : Exit");
System.out.print("Please select appropriate option : ");
int option = scan.nextInt();
int rateOption=0;
ArrayList<Double> ratings = new ArrayList<Double>();
double input = 0;
scan.nextLine();
switch (option)
{
case 1:
System.out.print("Please enter Prodcut name :");
String productName = scan.nextLine();
for (Product product : products)
{
if (product.getName().equals(productName))
{
System.out.println(product.toString());
}
else if(product.getName().equals(null))
{
System.out.println("The product you entered does not exist");
}
}
break;
case 2:
System.out.print("Please enter Product name :");
String prodName = scan.nextLine();
for (Product product : products)
{
if (product.getName().equals(prodName))
{
System.out.println("How would you rate this product?");
System.out.println("Enter (1) if you would not recommend");
System.out.println("Enter (2) if you found the product to be satisfactory");
System.out.println("Enter (3) if you would recommend");
}
rateOption = scan.nextInt();
switch (rateOption)
{
case 1:
input = 1.0;
ratings.add(input);
break;
case 2:
input = 2.0;
ratings.add(input);
break;
case 3:
input = 3.0;
ratings.add(input);
break;
default: System.out.println("You entered an invalid option");
break;
}
}
break;
case 3:
System.out.println("Products printed in sorted order");
Collections.sort(products);
for (Product product : products)
{
System.out.println(product.toString());
}
break;
case 4:
System.out.print("Which product you want to add? (F)ood or (N)onFood : ");
String type = scan.nextLine();
System.out.print("Please enter product Name : ");
String proName = scan.nextLine();
System.out.print("Please enter image url : ");
String image = scan.nextLine();
Product product = null;
if (type.equals("F"))
{
System.out.print("Please enter recipe file :");
String recipeFile = scan.nextLine();
product = new Food(proName, image);
try
{
((Food) product).setRecipeFile(recipeFile);
}
catch (FileNotFoundException e)
{
System.out.println(e.getMessage());
}
}
else
{
product = new NonFood(proName, image);
}
products.add(product);
break;
case 5:
isExit = true;
break;
default:
isExit = true;
break;
}
System.out.println();
}
scan.close();
}
}
What I have tried:
I have tried changing the calculateRatings method
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