Thanks for the report of this issue. I can create a PR for the bug fix.
I wonder if a better solution is simply to set the Locale of the DecimalFormat instance? That should avoid any future issues with subtle locale differences, and I think is clearer about what the intention is.
Are you able to try out the following code?
private static DecimalFormat createFormat(int maximumFractionDigits) {
NumberFormat nf = NumberFormat.getInstance(Locale.US);
// This is expected to succeed for Locale.US
DecimalFormat format;
try {
format = (DecimalFormat) nf;
}
catch (ClassCastException ex) {
throw new RuntimeException("Unable to create DecimalFormat for Locale.US");
}
format.applyPattern(DECIMAL_PATTERN);
format.setMaximumFractionDigits(maximumFractionDigits);
return format;
}
