Subclass instance - PowerPoint PPT Presentation

OO subtyping

OO subtyping. A type SubA may only be a subtype of A if every instance of SubA can be safely substituted for any instance of A. SubA instances must handle all the same messages as instances of A SubA methods must return results usable by any client of A. More specifically:.

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CSE115: Introduction to Computer Science I

CSE115: Introduction to Computer Science I. Dr. Carl Alphonce 219 Bell Hall 645-4739 alphonce@buffalo.edu. Agenda. Inheritance – our last relationship! Primitives &amp; control structures. inheritance.

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