Dots are returning me MisMatch exceptions, even i'm using Locale.US

Question

My program is returning Mismatch exception after I tried to input number with dot, on next.Double(). I'm using Locale.US.

Scanner sc = new Scanner(System.in);
Locale.setDefault(Locale.US);

double nota1, nota2, resultado;

nota1 = sc.nextDouble();
nota2 = sc.nextDouble();

resultado = nota1 + nota2;

if (resultado < 60.0) {
    System.out.println("NOTA FINAL = " + resultado);
    System.out.println("REPROVADO");
}
else {
    System.out.println("NOTA FINAL = " + resultado);
}

sc.close();

I get exception error message after I tried to input:"45.5" on line 19 (nota1 = sc.nextDouble();).

Error message:

Exception in thread "main" java.util.InputMismatchException
at java.util.Scanner.throwFor(Scanner.java:864)
at java.util.Scanner.next(Scanner.java:1485)
at java.util.Scanner.nextDouble(Scanner.java:2413)
at application.Program.main(Program.java:19)

You just need to move the line `Locale.setDefault(Locale.US);` up to before you create your Scanner and it should work. — OH GOD SPIDERS, Dec 06 '19 at 14:43
@luk2302, The suggestion from Oh God Spiders workss. All i had to do was to move the Locale line before the Scanner line. Many thanks — Yuji Yamamoto, Dec 06 '19 at 14:48
@OHGODSPIDERS should post the solution as an answer; then you should accept said answer. — JakeRobb, Dec 06 '19 at 14:55

score 0 · Accepted Answer · answered Dec 06 '19 at 15:21

You just need to change the order of your first to lines to

Locale.setDefault(Locale.US);
Scanner sc = new Scanner(System.in);

To first set the system default locale before you create your Scanner. When creating a new Scanner it will get and use the default locale that is set at the moment of its creation, therefor setting the default locale must be done before the Scanner initialization.

Alternatively you could also use:

Scanner scanner = new Scanner(System.in).useLocale(Locale.US);

to dreictly set a locale to use on the scaner without modifying the default locale.

Dots are returning me MisMatch exceptions, even i'm using Locale.US

1 Answers1