Thread: Why is my code storing input data in all three of my product objects?

Hello,

I have been trying to figure out this problem for the past day and yet every tweak I make I seem to mess it up even more. I should add that I am relatively new to java and programming in general.

My problem is that in my program, I have the user input data for one of three product objects, however when I read the data for all three objects, the same data is stored in all of them.
Anyway this is the method from the Interface class:

private void readInput() // the only method in the program that accepts product data from the user
    {
        Store matesStore = new Store();
        String name;
        int demandRate, productChoice;
        double setupCost, unitCost, inventoryCost, sellingPrice;
 
        Scanner console = new Scanner(System.in); 
        System.out.println("Please choose a product: (1), (2), (3)"); //this is where the user chooses which product they wish to enter data for.
        productChoice = console.nextInt();
        System.out.println("Please enter the product's name: ");
        name = console.next();   
        Store.check(name); 
        System.out.println("Please enter the product's demand rate: ");
        demandRate = console.nextInt();                         
        System.out.println("Please enter the product's setup cost: ");
        setupCost = console.nextDouble();
        System.out.println("Please enter the product's unit cost: ");
        unitCost = console.nextDouble();
        System.out.println("Please enter the product's inventory cost: ");
        inventoryCost = console.nextDouble();
        System.out.println("Please enter the product's selling price: ");
        sellingPrice = console.nextDouble();
        matesStore.addData(productChoice, name, demandRate, setupCost, unitCost, inventoryCost, sellingPrice); 
        // uses the addData() method in the Store class to set the data in the created Store object matesStore
        //continueOption();  //is meant to ask the user whether they are ready to continue but I still have some problems with it
        showInterface();
        chooseOption();
    }

And here is the method from the Store class:

public static void addData(int option, String newName, int newDemand, double newSetup, double newUnit, double newInventory, double newPrice) 
    //sets the product data for a particular product
    {
        if (option==1) setData(product1, newName, newDemand, newSetup, newUnit, newInventory, newPrice);
        else if (option==2) setData(product2, newName, newDemand, newSetup, newUnit, newInventory, newPrice);
        else /*(option==3)*/ setData(product3, newName, newDemand, newSetup, newUnit, newInventory, newPrice);      
    }
    private static void setData(Product product, String name, int demandRate, double setupCost, double unitCost, double inventoryCost, double sellingPrice)
    //uses the Product class' mutator methods to set the data
    {        
        Product.setName(name);
        Product.setDemand(demandRate);
        Product.setSetup(setupCost);
        Product.setUnit(unitCost);
        Product.setInventory(inventoryCost);
        Product.setPrice(sellingPrice);        
    }

If there's any additional info you need to help, I'm happy to provide it. Any help would be greatly appreciated.

Cheers

Edit: The problem I had was with static variables and methods. Any one having similar problems should read about the difference between static and instance variables and methods.