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Wrapper classes, boxing and autoboxing  RSS feed

 
Greenhorn
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Hello, Friends

I have so confusion on the following topics please help me on these--

Problems are---


1.What is coupling and cohesion? I know definition only I cud not understand basically how to use them in coding?
2.I have lots of confusion in wrapper classes and Boxing, Auto boxing?
3.Array reference assignment?
 
Ranch Hand
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Hi Aarti,

I'll take the item number 1.

Coupling and Cohesion are things to keep in mind when designing your code.
Just to review the definitions:

--
Coupling - The OO principle most closely associated to making sure that classes know about other classes ONLY through their APIs.

So coupling involves one or more classes interacting with one another. You only want to interact with another class through it's public API. If classes are written using good encapsulation - it should be easy to write code with loose coupling.

--
Cohesion - The OO principle most closely associated with making sure that a class is designed with a single well-focused purpose.

This just means that a class shouldn't do *everything* it should stick to one purpose. Represent one "thing".
--

Hope that helps!

Richard.
 
aarti gupta
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Hi, Richard Parker

Thanks for fast reply.

Please, solve also my 2nd and 3rd problems.
 
Richard Parker
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Can you be more specific with problems 2 and 3?
 
It is sorta covered in the JavaRanch Style Guide.
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