Bug when building from Germany (probably other countries as well)

When debugging, I noticed that I had no output besides the hard coded "System.out.print" lines. Going through the documentation, I found out that the method getInstance() in Score.getAmount uses the current default FORMAT locale ->

"public static final NumberFormat getInstance() Returns a general-purpose number format for the current default FORMAT locale."

In my case, this means that a score of "73,400" is parsed to 73 (because "." and "," are switched in comparison to the US), which is obviously less than 20000.

By declaring a variable "private final Locale locale = Locale.US;" in Score.java and then modifying getAmount() like so:

public long getAmount() { try { return NumberFormat.getInstance(locale).parse(amountAsString).longValue(); } catch (ParseException e) { e.printStackTrace(); } return 0; }

I passed the tests and was able to build.

Btw, thanks for making such great tutorials. I wouldn't be able to solve something like this otherwise :-)