输入双点而不是逗号

Question

I've got a input in my program expecting a double:

Scanner in_num = new Scanner(System.in);
double num1 = in_num.nextDouble();

but in the uploading system it throws exception java.util.InputMismatchException and I found out that it's because of the system writing a dot as a decimal point.

Is there a way in Java to take a number with a dot as a decimal point instead of comma?

Answer 1

1. Switch your Scanner into US Locale:

   Scanner sc = new Scanner(System.in);
   sc.useLocale(Locale.US);
   double d = sc.nextDouble();

2. Use Double.parseDouble():

   BufferedReader reader = new BufferedReader(new inputStreamReader(System.in));
   double d = Double.parseDouble(reader.readLine());

Answer 2

I found solution, just had to think a little bit. I've just taken a next String and parsed it to Double.

double num1 = Double.parseDouble(in_num.next());