Can Enum parameterized type implement an interface?

Question

I am trying to define a class that is parameterized with an Enum and the parameterized Enum must implement an interface. Here is some code:public interface MatchingEnum<E> {
    String match(); // This interface is not yet complete
public class EnumField<E extends Enum<E> & MatchingEnum<E>> {
    private E enumeration;
    public EnumField(E enumeration) {
        this.enumeration = enumeration;
    private static class Test {
        EnumField<TestType> c;
    public enum TestType implements MatchingEnum<TestType> { One, Two, Three;
        public String match() {
            return null;
}The problem is that the compiler complains that "classes cannot directly extend java.lang.Enum". If I delete the interface for the parameterized type(below) it compiles fine. Why can't the compiler handle this? Does specifying an Interface for an Enum bounds (E) force it to directly extend Enum? If so, why does the actual Enum compile?public class EnumField<E extends Enum<E>> {Blah, blah, blah... // This compiles
public class EnumField<E extends Enum<E> & MatchingEnum<E>> {Blah, blah blah... // This does NOT compile