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 #13
Stuart C. Shapiro
Spring, 2007

Final Words on Chapter 5: Accessors, Mutators, Composition, Association

Close look at the line
new chapter1.Terrarium().add(new chapter1.Ant().start());
from
chapter2.EcoSystem()
See Green diagram of animals.Dog. Note the association (knows-a) relationship between animals.Dog and java.lang.String:
1. A String is passed to the animals.Dog constructor,
2. and stored in an instance variable (_name) of the Dog.
Store the Dog's Flea in an instance variable, with an accessor method, but no mutator method.
Look at the Green diagram again.
Note the composition (has-a) relationship between animals.Dog and animals.Flea:
1. A new animals.Flea is constructed in the animals.Dog constructor,
2. and stored in an instance variable (_name) of the Dog.

Last modified: Sun Oct 7 18:01:16 EDT 2007
Stuart C. Shapiro <shapiro@cse.buffalo.edu>

Final Words on Chapter 5: Accessors, Mutators, Composition, Association