A class is a subclass of itself.

In Java, a class is not a subclass of itself. Inheritance in Java involves creating a new class based on an existing class, and the new class is referred to as the subclass. The existing class is known as the superclass. A subclass inherits attributes and behaviors from its superclass.

A class cannot be a subclass of itself because it would create a circular dependency and result in ambiguity. In Java, this is not allowed, and it would lead to a compilation error. Each class in Java can have only one direct superclass, forming a single inheritance tree.