Exception in thread main" java.util.InputMismatchException

Question

I am getting an error message from the output when I typed : 199.99

 Exception in thread "main" java.util.InputMismatchException
    at java.util.Scanner.throwFor(Scanner.java:909)
    at java.util.Scanner.next(Scanner.java:1530)
    at java.util.Scanner.nextFloat(Scanner.java:2388)
    at myproject2.Myproject2.main(Myproject2.java:11)

but my code doesn't have any errors:

package myproject2;

import java.util.Scanner;
public class Myproject2 {


    public static void main(String[] args) {
    Scanner input = new Scanner(System.in);

    System.out.print("Enter purchase amount: ");
    double purchaseAmount = input.nextDouble();

    double tax = purchaseAmount * 0.06;
    System.out.println("Sales tax is " + (int)(tax * 100) / 100.0);


    }

}

Please help me!

Hmm. The stack trace shows nextFloat, but your code shows nextDouble. Are you sure that stack trace was obtained by running that code? — Jon Skeet
– Jon Skeet, Commented Jan 30, 2014 at 17:18
And what locale are you running in? I wonder whether it was expecting "199,99". — Jon Skeet
– Jon Skeet, Commented Jan 30, 2014 at 17:19
@Vamshi : No I'm sure I give a number and I'm getting this error for any number but integer. — hello_java
– hello_java, Commented Jan 30, 2014 at 17:39
If you solved your problem, don't just add [Solved] to your title. Perhaps tell us how you solved it in an answer. Or if one of the answers solved it for you, accept the answer. — Bart
– Bart, Commented Jan 30, 2014 at 18:48

Hugo Sousa · Accepted Answer · 2014-01-30 17:31:33Z

1

The nextDouble method expects the input to be like A,B. If your input is 199,99, there will be no errors.

If you want it to accept doubles the way you said, you can set the Locale to your Scanner.

input.useLocale(Locale.US);

edited Jan 30, 2014 at 17:31

answered Jan 30, 2014 at 17:19

Hugo Sousa

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1 Comment

Marcin Krupa Over a year ago

the expected input depends on the current locale

Ben Dale · Accepted Answer · 2014-01-31 10:02:24Z

0

input.useLocale(Locale.UK);

You need to provide the Scanner's locale.

E.g.

Scanner input= new Scanner(System.in).useLocale(Locale.UK);

edited Jan 31, 2014 at 10:02

answered Jan 30, 2014 at 17:19

Ben Dale

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2 Comments

hello_java Over a year ago

I'm newbie in java and I don't know how to do this.

Ben Dale Over a year ago

I've edited my answer to provide you with an example.

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