ADDITIONAL SYSTEM INFORMATION :
Works in Java 8 202, broken in Java 11.0.1 and above (including Java 12 build 30)

A DESCRIPTION OF THE PROBLEM :
getDateInstance returns wrong pattern. I have only testes da and sv languages.

REGRESSION : Last worked in version 8u202

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the program and see the output

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
1.8.0_201
dd-MM-yy
yyyy-MM-dd

1.8.0_202
dd-MM-yy
yyyy-MM-dd
ACTUAL -
11.0.1
dd/MM/y
y-MM-dd

11.0.2
dd/MM/y
y-MM-dd

12-ea
dd/MM/y
y-MM-dd

---------- BEGIN SOURCE ----------
public class DateFormatTest1 {
public static void main(String[] args) {
System.out.println(System.getProperty("java.version"));
System.out.println(((SimpleDateFormat)DateFormat.getDateInstance(DateFormat.SHORT, new Locale("da", "DK"))).toPattern());
System.out.println(((SimpleDateFormat)DateFormat.getDateInstance(DateFormat.SHORT, new Locale("sv", "SE"))).toPattern());
}
}
---------- END SOURCE ----------

FREQUENCY : always