InputMismatchException occurred when inputing String and Double values

Question

Here is my problem I've been struggling with:

I want the input to be in this form: 1

So I wrote the code like this. Unfortunately, it either gives me an InputMismatchException at line 6 or cannot break at "END_PRICES".

        Scanner input =new Scanner(System.in);
        ArrayList<String> fruitName = new ArrayList<>();
        ArrayList<Double> fruitPrice = new ArrayList<>();
        while(true) {
            String str=input.next();
            Double v=input.nextDouble();
            if(str.equals("END_PRICES")) break;
            fruitName.add(str);
            fruitPrice.add(v);
            input.nextLine();
        }

Anyone knows how to solve this? Thanks in advance!

Swap around the Double and if lines?

Andy Turner
– Andy Turner

2021-09-22 11:38:07 +00:00
Commented Sep 22, 2021 at 11:38 — Andy Turner
– Andy Turner, Commented Sep 22, 2021 at 11:38
@Andy Turner Thanks, it works! Amazing!

Tina
– Tina

2021-09-22 11:47:57 +00:00
Commented Sep 22, 2021 at 11:47 — Tina
– Tina, Commented Sep 22, 2021 at 11:47

Harshita · Accepted Answer · 2021-09-22 11:41:03Z

0

The condition in while loop can be changed to check first if there is a nextLine and then find contents of the line like this:

while (sc.hasNextLine()){
            String s = sc.nextLine();
            if (s.trim().equalsIgnoreCase("END_PRICES")){
                break;
            }
            String[] values = s.split(" ");
            double price = Double.parseDouble(values[1]);
            fruitName.add(values[0]);
            fruitPrice.add(price);
        }

answered Sep 22, 2021 at 11:41

Harshita

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1 Comment

Tina Over a year ago

Thanks a lot! Your way of thinking is much better than mine!

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