A DESCRIPTION OF THE PROBLEM :
Locale locale = new Locale("fr", "CH");
NumberFormat format = NumberFormat.getNumberInstance(locale);
DecimalFormatSymbols s = ((DecimalFormat) format).getDecimalFormatSymbols();
System.out.println((int)s.getGroupingSeparator());

java 8: 39
java 10.0.1 and 11: 160

REGRESSION : Last worked in version 8u161


FREQUENCY : always