Exception in thread "main" java.util.InputMismatchException "double" input error -

First of all, I have read many threads about this error, but no one solves my problem.

Here is my code:

  import java.util.Scanner; Public classroom programa1 {public static zero main (string [] args) {scanner s = new scanner (System.in); Double strana_a, strana_b, strana_c; Strana_a = s.nextDouble (); // strana_b = s.nextDouble (); // strana_c = s.nextDouble (); Println (strana_a); S.close (); For example, when I type 8.0, I see this error, what am I doing?  
 
 8,5 , and do not  8.5 ), or use the appropriate locale for the point scanner Initialize to, such as: 
 
  scanner scanner = new scanner (system.इन) .USLokel (local.US);