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Coupling question

 
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Hi there, I have problems understanding the coupling topic expectations for the exam (SCJP 1.5), is there any good examples that could illustrate this concept and what is the exam expecting us to know?, thanks in advance.
 
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K&B book.
 
Serch Hdez
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Thanks but I read it and it wasn't clear... :S.. does somebody know any other sources for that?
 
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Loose coupling refers to minimizing the dependence of an object on other objects. In other words, you can change the implementation of a class without affecting the other classes.These properties make the code extensible and easy to maintain.

For example, consider two classes, A and B. If they do not use each other at all (neither of them instantiates the other, invokes a method on the other, and so on), they are not coupled. If A uses B (for example, instantiates B) but B does not use A, then they are loosely coupled. If both A and B use each other, then they are tightly coupled.

Another criterion of loosely coupled classes is how they access each other�s members. Loose coupling demands that a class keep its members private and that the other class access them
through getters and setters
 
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