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Is It good to make function call in Constructor?

Abhijit Das
Ranch Hand

Joined: Sep 25, 2007
Posts: 156
hi,
Is it a good practice to make some function calls in side constructors?



thanks


Abhijit Das
SCJP 5.0 | SCWCD 1.5
Rob Spoor
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Joined: Oct 27, 2005
Posts: 19556
    
  16

If the method is private, sure. That way you can split separate parts of code into methods, so you're constructor does not become one large piece of code.

If the method is not private (i.e. it can be overridden) you need to be a bit more cautious, as any sub class can incorrectly override it leading to unexpected errors.


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Jesper de Jong
Java Cowboy
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Joined: Aug 16, 2005
Posts: 13884
    
  10

Even if the method is private, there are things you have to watch out for. As long as you're in the constructor (or in a method called by the constructor), you must keep in mind that the object isn't fully initialized yet. The method must be aware of that, and not assume that the object is fully initialized.


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