Basic HTML version of Foils prepared June 5 99

Foil 47 Inheritance (the subclass relationship)

From Java Language in the Computer Science Curriculum ADMI Tutorial Duluth Minnesota -- June 3 99. by Geoffrey C. Fox
In the Java class header, we put B extends A which means B is a subclass of A, if B has all the variables and methods of A (and more).
In the class definition of B, the child class, there is no need to repeat declarations of variables and methods of A, they are assumed to be there. The definition of B has the additional variables and methods of B.
Or B may give a new definition of some method of A. This is called overriding.

© Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

If you have any comments about this server, send e-mail to webmaster@npac.syr.edu.

Page produced by wwwfoil on Sat Jun 5 1999