Why can't a Java Generic implement an Interface?

Question

Is there a logical reason why E cannot implement my interface HasName?

public class SinglyLinkedList<E extends HasName> {
    // stuff...
}

Answer 1

The extends keyword applies to interfaces too. That is:

public class SinglyLinkedList<E extends HasName> {

Means that E must be a type that extends a class, or implements an interface, called HasName.

It is not possible to code E implements HasName - that is implied by E extends HasName.