implement loadProducts method

src/main/java/Main.java

@@ -15,15 +15,14 @@ public class Main {
         }
         Scanner scanner = new Scanner(input);
 
-        // TODO:
-        // - Read each line from products.csv
-        // - For each line, parse productId, name, and price
-        // - The format of the file is like this:
-        //      [productId],[name],[price]
-        // - Store Product objects in the productCatalog ArrayList
-
-        // NOTE
-        // - The data in products.csv is guaranteed to be valid.
+        while (scanner.hasNextLine()) {
+            String line = scanner.nextLine();
+            String[] cells = line.split(",");
+            int productID = Integer.parseInt(cells[0]);
+            String productName = cells[1];
+            double price = Double.parseDouble(cells[2]);
+            productCatalog.add(new Product(productID, productName, price));
+        }
     }
 
     public static void main(String[] args)