Inventory

Main Class

package inventory;

import java.util.ArrayList;
import java.util.Scanner;
import java.io.FileReader;
import java.io.FileNotFoundException;

public class Inventory
{
    private static Scanner scan = new Scanner(System.in);

    public static void main(String[] args)
    {
        ArrayList<Product> InventoryList = new ArrayList<>();
        Inventory I = new Inventory();
        int option = 0;

        Inventory.openFile(InventoryList);

        while(option != 4)
        {
            System.out.println("1.) Add items to the inventory");
            System.out.println("2.) Show items in the inventory");
            System.out.println("3.) Show the total cost of the inventory.");
            System.out.println("4.) Quit the program.");
            option = scan.nextInt();

            switch(option)
            {
                case 1:
                    I.addItems(InventoryList);
                    break;
                case 2:
                    I.showInventory(InventoryList);
                    break;
                case 3:
                    I.showTotalCost(InventoryList);
                    break;
                case 4:
                    System.out.println("\nApplication Terminated.");
                    break;
                default:
                    System.out.println("This option does not exist in the menu. Try again");
                    break;
            }
        }
    }

    public static void openFile(ArrayList<Product> p)
    {
       Scanner scan = null;
       String firstLine = "";
       String line;

     try
     {
       scan = new Scanner(new FileReader("product.csv"));

       firstLine = scan.nextLine();

       while(scan.hasNextLine())
       {
           line = scan.nextLine();
           String[] items = line.split(",");

           Product product = new Product();

           product.setProductName(items[0]);
           product.setQuantity(Integer.parseInt(items[1]));
           product.setPrice(Double.parseDouble(items[2]));
           product.setUPC(items[3]);

           p.add(product);
       }
       scan.close();
     }
     catch(FileNotFoundException e)
     {
         System.err.println("File was not found");
     }
    }

    public static void writeFile(ArrayList<Product> p)
    {

    }

    public void addItems(ArrayList<Product> p)
    {
        int option;

        System.out.println("");

        System.out.println("1.) Add a new product to the inventory.");
        System.out.println("2.) Increase the quantity of an existing product.");
        option = scan.nextInt();

       if(option == 1)
       {
        String productName;
        int quantity;
        double price;
        String UPC;

        scan.nextLine();

        System.out.println("\nEnter the name of the product?");
        productName = scan.nextLine();

        System.out.println("\nHow many of these items do you have?");
        quantity = scan.nextInt();

        System.out.println("\nWhat is the price of this item?");
        price = scan.nextDouble();

        scan.nextLine();

        System.out.println("\nWhat is the UPC number for this item?");
        UPC = scan.nextLine();

        if(p.size() > 0)
         {
             for (Product pro : p)
             {
                 while(pro.getUPC().equals(UPC))
                 {
                     System.out.println("\nNo duplicates allowed, try again.");
                     UPC = scan.nextLine();
                 }
             }
         }

        Product product = new Product(productName, quantity, price, UPC);

        p.add(product);
       }
       else if(option == 2)
       {
           String oldProduct;
           String response;
           Inventory I = new Inventory();

           scan.nextLine();

           System.out.println("\nEnter the Name of the product.");
           oldProduct = scan.nextLine();

               for(int i=0; ; i++)
               {
                   if (p.get(i).getProductName().equalsIgnoreCase(oldProduct))
                    {

                    }
                    else if(i == p.size()-1)
                    {
                        System.out.println("\nThis product is not in our inventory.");
                        break;
                    }
               }

               System.out.println("\nIs there another item that you would like to search by Name? ");
               response = scan.nextLine();

               while(!(response.equalsIgnoreCase("Yes")) && !(response.equalsIgnoreCase("No")))
               {
                   System.out.println("\nOnly, Yes or No are acceptable inputs. Try again.");
                   response = scan.nextLine();
               }

               if(response.equalsIgnoreCase("Yes"))
               {
                   System.out.println("\nStarting a new search");
                   I.showInventory(p);
               }
               else if(response.equalsIgnoreCase("No"))
               {
                   System.out.println("\nReturning to the main menu\n");
               }
       }

        System.out.println("");
    }

    public void showInventory(ArrayList<Product> p)
    {
       int choice;
       String response;
       Inventory I = new Inventory();

       System.out.println("");

       System.out.println("1.) Search the inventory by row");
       System.out.println("2.) Search the entire inventory");
       System.out.println("3.) Search the inventory by UPC ID");
       System.out.println("4.) Search the inventory by name");
       choice = scan.nextInt();
       scan.nextLine();

           if(choice == 1)
           {
               int arrayLimit = p.size();
               int row;

               System.out.println("\nEnter the row that you would like to search");
               row = scan.nextInt();

               while(row > arrayLimit || row <= 0)
               {
                   System.out.println("\nSorry, that row doesn't exist. Try again");
                   row = scan.nextInt();
               }

               System.out.print("\nItem found: ");

               System.out.println(p.get(row-1));

               scan.nextLine();

               System.out.println("\nIs there another item that you would like to seacrh by row? ");
               response = scan.nextLine();

               while(!(response.equalsIgnoreCase("Yes")) && !(response.equalsIgnoreCase("No")))
               {
                   System.out.println("\nOnly, Yes or No are acceptable inputs. Try again.");
                   response = scan.nextLine();
               }

               if(response.equalsIgnoreCase("Yes"))
               {
                   System.out.println("\nStarting a new search");
                   I.showInventory(p);
               }
               else if(response.equalsIgnoreCase("No"))
               {
                   System.out.println("\nReturning to the main menu\n");
               }
           }
           else if(choice == 2)
           {
               System.out.println("");

               for (Product p1 : p)
               {
                   System.out.println(p1);
               }

               System.out.println("");
           }
           else if(choice == 3)
           {
               String UPC;

               System.out.println("\nEnter the UPC serial number.");
               UPC = scan.nextLine();

               System.out.print("\nItem found: ");

           for (Product p1 : p)
           {
               if (p1.getUPC().equals(UPC))
               {
                   System.out.println(p1);
               }
            }

               System.out.println("\nIs there another item that you would like to search by UPC? ");
               response = scan.nextLine();

               while(!(response.equalsIgnoreCase("Yes")) && !(response.equalsIgnoreCase("No")))
               {
                   System.out.println("\nOnly, Yes or No are acceptable inputs. Try again.");
                   response = scan.nextLine();
               }

               if(response.equalsIgnoreCase("Yes"))
               {
                   System.out.println("\nStarting a new search");
                   I.showInventory(p);
               }
               else if(response.equalsIgnoreCase("No"))
               {
                   System.out.println("\nReturning to the main menu\n");
               }
           }
           else if(choice == 4)
           {
               String productName;

               System.out.println("\nEnter the Name of the product.");
               productName= scan.nextLine();

               for(int i=0; ; i++)
               {
                   if (p.get(i).getProductName().equalsIgnoreCase(productName))
                    {
                         System.out.print("\nItem found: ");
                         System.out.println(p.get(i));
                         break;
                    }
                    else if(i == p.size()-1)
                    {
                        System.out.println("\nThis product is not in our inventory.");
                        break;
                    }
               }

               System.out.println("\nIs there another item that you would like to search by Name? ");
               response = scan.nextLine();

               while(!(response.equalsIgnoreCase("Yes")) && !(response.equalsIgnoreCase("No")))
               {
                   System.out.println("\nOnly, Yes or No are acceptable inputs. Try again.");
                   response = scan.nextLine();
               }

               if(response.equalsIgnoreCase("Yes"))
               {
                   System.out.println("\nStarting a new search");
                   I.showInventory(p);
               }
               else if(response.equalsIgnoreCase("No"))
               {
                   System.out.println("\nReturning to the main menu\n");
               }
           }
    }

    public void showTotalCost(ArrayList<Product> p)
    {
        double totalCost = 0;

        for(int i=0; i<p.size(); i++)
        {
            totalCost += p.get(i).getPrice() * p.get(i).getQuantity();
        }

        System.out.println("");
        System.out.printf("The total cost of the entire inventory is %.2f",totalCost);
        System.out.println("\n");
    }
}




Product Class



package inventory;

public class Product
{
    private String productName;
    private int quantity;
    private double price;
    private String UPC;

    public Product(String productName, int quantity, double price, String UPC)
    {
        this.productName = productName;
        this.quantity = quantity;
        this.price = price;
        this.UPC = UPC;
    }

    public Product()
    {

    }

    public String getProductName()
    {
        return productName;
    }

    public int getQuantity()
    {
        return quantity;
    }

    public double getPrice()
    {
        return price;
    }

    public String getUPC()
    {
        return UPC;
    }

    public void setProductName(String productName)
    {
        this.productName = productName;
    }

    public void setQuantity(int quantity)
    {
        this.quantity = quantity;
    }

    public void setPrice(double price)
    {
        this.price = price;
    }

    public void setUPC(String UPC)
    {
        this.UPC = UPC;
    }

    @Override
    public String toString()
    {
        return productName + ", " + quantity + ", " + price + ", " + UPC;
    }
}