Yes. You see this when the main window of a browser contains frames, which themselves contain other components.
The component classes that make up the AWT and Swing are
related to each other by inheritance.
The class that is the ultimate ancestor of all other classes
is the class called
Object defines the basic nature of all Java objects.
Much of what goes on behind the scenes when a Java program is running
is defined by
Part of the Java class hierarchy looks like this:
The "clouds" convey the idea that these are class
definitions, not objects.
The diagram shows that the classes
String, and many others
Object as a direct ancestor.
The cloud for the
Component class is dotted
to show that it is an abstract class.
(Review: ) Can a child class have methods and variables in addition to those it inherits from its parent?