Enum.valueOf throws a warning for unknown type of class that extends Enum?

Question

Give this:

Class enumClass = ...; // being passed in from a constructor
Enum e = Enum.valueOf(enumClass, aString); // produces a warnin         


        

Answer 1

Both Enum and Class are generic. So if you don't want any warnings:

class Foo>{
    Class enumClass;
    T e = Enum.valueOf(enumClass, str);
}

Or you can have a generic method:

public > T getEnumValue(Class clazz, String name) {
    T e = Enum.valueOf(clazz, name);
    return e;
}

But if you don't use generics, you are using raw types, and therefore the compiler issues warnings - there is no option apart from suppressing them.