CODEWITHSUNDEEP
javaoutputjava.util.scanner
Crispy Bagpipes
Crispy Bagpipes

Reputation: 7

Java skipping over a print statement scanner, specific

So my problem is that I want to ask for input for using Scanner, but it just doesn't print out at all. And when it displays the value for the skipped Scanner, Scanner cheeseType = new Scanner(System.in);, I get null.

package classesProject;

import java.util.Scanner;

class Pizza {

    String size;
    String cheese;
    int numToppings;
    double price = 0;

}
public class pizzaTime {

    public static void main(String[] args) {

        Pizza order1 = new Pizza();

        double priceOfSize = 0;
        double priceOfCheese = 0;
        double priceOfToppings = 0;

        System.out.println("Pizza size small, medium or large: ");
        Scanner sizeAsker = new Scanner(System.in);
        order1.size = sizeAsker.nextLine();

        if(order1.size == "small") {
            priceOfSize = 3.0;

        } else if(order1.size == "medium") {
            priceOfSize = 5.0;

        } else if(order1.size == "large") {
            priceOfSize = 7.0;

        System.out.println("Cheese type: normal, xtra, or thic: ");
        Scanner cheeseType = new Scanner(System.in);
        order1.cheese = cheeseType.nextLine();

        }if(order1.cheese == "normal") {
            priceOfCheese = 0.0;

        } else if(order1.cheese == "xtra") {
            priceOfCheese = 0.5;

        } else if(order1.cheese == "thic") {
            priceOfCheese = 1.0;

        }

        System.out.println("Number of toppings: ");
        Scanner toppingAsker = new Scanner(System.in);
        order1.numToppings = toppingAsker.nextInt();

        priceOfToppings = order1.numToppings * 0.25;

        double orderTotalPrice = priceOfSize + priceOfCheese;

        System.out.println("Pizza size: " + order1.size + "\n"
                + "Cheese type: " + order1.cheese + "\n"
                + "Number of toppings: " + order1.numToppings + "\n"
                + "Order total: " + orderTotalPrice
                );

    }

}

The one that gets skipped is:

System.out.println("Cheese type: normal, xtra, or thic: ");
Scanner cheeseType = new Scanner(System.in);
order1.cheese = cheeseType.nextLine();

Upon running, the console displays:

Pizza size small, medium or large: 
small
Number of toppings: 
2
Pizza size: small
Cheese type: null
Number of toppings: 2
Order total: 0.0

So as you can see, it jumps straight from the pizza size Scanner to the number of toppings Scanner, rather than going in the sequential order. I don't have any idea why, or what I should do to fix this.

Upvotes: 0

Views: 393

Answers (2)

Gtomika
Gtomika

Reputation: 885

It's not a good idea to use multiple scanners on the same input stream (System.in in your case). Make only one scanner in the beginning of the method:

Scanner scanner = new Scanner(System.in);
//read input with this here

scanner.close(); //also close it

Edit: Stefan's answer is the correct one, but this is still a good idea.

Upvotes: 0

Stefan
Stefan

Reputation: 2178

Since you are closing the bracket after the next question, this one is only asked with large pizza's

else if(order1.size == "large") {
        priceOfSize = 7.0;

    System.out.println("Cheese type: normal, xtra, or thic: ");
    Scanner cheeseType = new Scanner(System.in);
    order1.cheese = cheeseType.nextLine();

    }

If you would put a closing bracket after priceOfSize = 7, you can continue. You will still have to fix the missing bracket elsewhere though.

Upvotes: 1

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