Java Enums: List enumerated values from a Class<? extends Enum>

Question

I've got the class object for an enum (I have a Class<? extends Enum>) and I need to get a list of the enumerated values represented by this enum. The values static function has what I need, but I'm not sure how to get access to it from the class object.

Answer 1

Class.getEnumConstants

Answer 2

If you know the name of the value you need:

     Class<? extends Enum> klass = ...       Enum<?> x = Enum.valueOf(klass, "NAME"); 

If you don't, you can get an array of them by (as Tom got to first):

     klass.getEnumConstants(); 

Answer 3

using reflection is simple as calling Class#getEnumConstants():

List<Enum<?>> enum2list(Class<? extends Enum<?>> cls) {
   return Arrays.asList(cls.getEnumConstants());
}