java - Scanner InputMismatchException from file -

doing first steps java, here's problem:

1.) rawdata.txt can read:

import java.util.scanner; import java.io.file; import java.io.filenotfoundexception; import static java.lang.system.out;  class readandwrite {      public static void main(string args[])                           throws filenotfoundexception {          scanner diskscanner = new scanner(new file("rawdata.txt"));          string diskstring;         diskstring = diskscanner.nextline();         out.println(diskstring);         diskscanner.close();     } } 

the result in eclipse console :

>19.5 5  

so guess content can read.

but: nextdouble() , nextint() won't work:

import java.util.scanner; import java.io.file; import java.io.filenotfoundexception;  class readandwrite {      public static void main(string args[])                           throws filenotfoundexception {          scanner diskscanner = new scanner(new file("rawdata.txt"));         double unitprice, quantity;         unitprice = diskscanner.nextdouble();         quantity = diskscanner.nextint();          [...]          diskscanner.close();      } } 

the error message console is:

exception in thread "main" java.util.inputmismatchexception     @ java.util.scanner.throwfor(scanner.java:864)     @ java.util.scanner.next(scanner.java:1485)     @ java.util.scanner.nextdouble(scanner.java:2413)     @ readandwrite.main(readandwrite.java:16) 

so can understand problem?

i have made test on machine , i've found problem. expected double format depends on locale. in countries decimal digits separated , , ..

    scanner diskscanner = new scanner(new file("rawdata.txt")).uselocale(locale.english); 

will solve problem. otherwise change file from

19.5 5 

to

19,5 5