How do I calculate numbers with If statement if more than one condition is met?

Question

I have edited my code below with the changes I have made. Here is the output I am getting.

Please enter an item.imported bottle of perfume Please enter the price for imported bottle of perfume: 47.50 Would you like to continue to add items? (Type Y) for Yes and (Type N) for No.n Your cart contains the following at items with tax{imported box of chocolate=10.00, imported bottle of perfume=67.50} 67.50

The box of chocolate should be 10.50 and the imported bottle should be 54.65. I use the debug and saw that the total price variable I am using holds 10.50 but it looks like it changes back. Also, instead of reading the loop that has

 if (item.contains("imported") && item.contains("bottle")) 

it reads

 else if (item.contains("imported"))

first. My full code is below.

public class SalesTax 
{
public static void main(String[] args) 
{
    // Input items for shopping cart
    HashMap<String, String> cart = new HashMap<String, String>();
    HashMap<String, String> shoppingcart = new HashMap<String, String>();

    // Create a Scanner
    Scanner input = new Scanner(System.in);

    // variables
    char done;

    //boolean goods;
    double totalprice = 0.00;
    double taxprice;

    // Pick items for list.
    do 
    {  
        System.out.print("Please enter an item.");
        String item = input.nextLine();

        System.out.print("Please enter the price for "+ item + ": ");
        String price = input.nextLine(); 

        double price1 = Double.parseDouble(price);
        totalprice += price1; 

        //System.out.println(String.format("%.2f",totalprice));
        String price2 = String.valueOf(price1);
        cart.put(item, price2);

        //determine if item will have additional tax
        if (item.contains("music"))
        {
             price1 = Double.parseDouble(price);
            taxprice = price1 * .10;

            totalprice = (totalprice + taxprice);

            //System.out.println(String.format("%.2f",totalprice));
            String newprice2 = String.valueOf(String.format("%.2f", price1 * 1.10));
            shoppingcart.put(item,newprice2);
        }
        else if (item.contains("imported"))
        {
             price1 = Double.parseDouble(price);
            taxprice = price1 * .05;

            totalprice = (totalprice + taxprice);

            //System.out.println(String.format("%.2f",totalprice));
            String newprice2 = String.valueOf(String.format("%.2f", totalprice));
            shoppingcart.put(item,newprice2);
        }
        if (item.contains("imported") && item.contains("bottle"))
        {
             price1 = Double.parseDouble(price);
            taxprice = price1 * (.05 + .10);

            totalprice = (totalprice + taxprice);

            //System.out.println(String.format("%.2f",totalprice));
            String newprice2 = String.valueOf(String.format("%.2f", totalprice));
            shoppingcart.put(item,newprice2);
        }
        else if(item.contains("bottle"))
        {
             price1 = Double.parseDouble(price);
            taxprice = price1 * .10;

            totalprice = (price1 + taxprice);

            //System.out.println(String.format("%.2f",totalprice));
            String newprice2 = String.valueOf(String.format("%.2f", price1 * 1.10));
            shoppingcart.put(item,newprice2);
        }
        else 
        {
            shoppingcart.put(item, price);
        }


        System.out.print("Would you like to continue to add items? (Type Y) for Yes and (Type N) for No.");
        done = input.nextLine().charAt(0);
    } while(Character.toUpperCase(done) == 'Y');

   System.out.println("Your cart contains the following at items with tax" + shoppingcart); //+ String.format("%.2f", totalprice));
   System.out.println(String.format("%.2f",totalprice));
}

}

Answer 1

Use the && operator. It's called the logical AND operator.

//if item contains both "imported" and "bottle"
if (item.contains("imported") && item.contains("bottle")){
    //code
}

Read more about operators here.

Answer 2

Whenever you use any kinds of an if statement you pass a boolean variable to it. There are two logical operators in Java that take two booleans and output one boolean:

• && (logical AND)
• || (logical OR)

b1 && b2 is true if b1 and b2 are true - otherwise it is false.

b1 || b2 is true if b1 or b2 or both are true - otherwise it is false.

In your case if you want to execute the same block of code when "music" or "bottle" are contained in the input text, you would do something like this:

if(items.contains("music") || items.contains("bottle")) {
    //modify prices
}