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Question
SCJA Question Number 2
Guys;
what does this mean ?
1.3 Describe, compare, and contrast class compositions, and associations (including multiplicity: (one-to-one, one-to-many, and many-to-many), and association navigation.
Thanks for the time if you have any more time pls. help this question worth 150 pts :
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Answers
Compositions means that a class is composed of another class, and depends on that other class for it's existance.
i.e. If a classes only constructor creates an instance of another class and requires it for it's whole lifetime.
Associations are where a class uses another class in some way.
i.e. an objects instance variables are often associations
1 to 1 means a class will be associated with an instance of another class i.e. will have one instance variable of
1 to many means a class will be associated with many instances of another class, i.e. will have a collection of that other class
many to many means a class will be associated with many instances of another class and that other class will be associated with many instances of that class.
association navigation refers to which class knows about the other, i.e. one class has a variable of another class but the other may or may not
hrmm... hope that's useful to you
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by: rajah_mohammedPosted on 2005-06-05 at 00:51:01ID: 14147818
I forgot to say its part of this objective :
http://www.sun.com/trainin