Why can I anonymously subclass an enum but not a final class?

Question

This code:

public class Sandbox {
    public enum E {
        VALUE {
            @Override
            public String toString() {
                return \"I         


        

Answer 1

If you take the following into account, your concern may be lessened:

A class which has no non-private constructor is effectively final since it is impossible to declare its subclass outside of its body. It is a minor technical detail whether the class defined by an enum is declared final or not: it will in either case be effectively final.