Question

A class with has an inner class. Can the inner class have a subclass?

a) Yes
b) No

Answer 1

Yes, an inner class in Java can have a subclass. To create a subclass of an inner class, one must instantiate the outer class, and then declare the subclass within the context of the outer class.

Step-by-step explanation:

The inner class in a Java class can have a subclass. The answer is yes, an inner class can indeed have a subclass. In Java, an inner class is a class defined within the scope of another class, and like any other class in Java, it can be extended by another class. This includes the possibility of the inner class being a superclass to a subclass that inherits from it.

To implement a subclass of an inner class, you must first instantiate the outer class. Then, within the context of the outer class, you can declare the subclass of the inner class. Here's an example:

public class OuterClass {
class InnerClass {
...
}
}

class SubclassOfInner extends OuterClass.InnerClass {
SubclassOfInner(OuterClass oc) {
oc.super();
}
...
}

In this example, SubclassOfInner is a subclass of the inner class InnerClass and it's instantiated with a reference to an instance of OuterClass.