UNIVERSITY AT BUFFALO, THE STATE UNIVERSITY OF NEW YORK
The Department of Computer Science & Engineering

STUART C. SHAPIRO: CSE 115 C

CSE 115
Introduction To Computer Science for Majors I
Lecture C
Lecture Notes #17
Stuart C. Shapiro
Spring, 2007

The Class Hierarchy

A subclass extends its superclass. Its header will look like:

accessControl class ClassName extends SuperClass implements Interface1, ...

A class may directly extend at most one superclass.
A class may directly generalize many subclasses.
The top of the class hierarchy is java.lang.Object. It is the direct superclass of any class that doesn't extend any other class explicitly.
A class inherits instance variables and methods of its superclasses.

Last modified: Sat Oct 20 10:06:53 EDT 2007
Stuart C. Shapiro <shapiro@cse.buffalo.edu>

The Class Hierarchy