Can an interface extend a class?
In Java an interface can only extend another interface, called a super-interface. This is an inheritance relationship like superclass-subclass; the sub-interface inherits all the constant variables and abstract methods defined in the super-interface and can add its own. Since an interface may have a static class defined within it, it is possible for a class in a sub-interface to extend a class in a super-interface, but that is a different thing entirely. In this case the extension of nested classes is no different from standard extends inheritance except the hosts of the classes are interfaces. There is no mixture of class and interface extension. Actions: Follow-up or correct this answer. Submit a new question.
