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Need help.....

Elahe Shafie
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Joined: Dec 12, 2001
Posts: 291
Ho dear Friends,
I don't understand what is the second line for?could you please help me to describe second line?
Many thanks,
Elahe
---------------------------
public class DbManager {
private static DbManager oSingle = null;


Thanks,
Elahe
Mike Curwen
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Joined: Feb 20, 2001
Posts: 3695

that's the start of a Singleton pattern.
This ensures that only a single instance of this class is possible.

Because the constructor is protected (or private), code using this class cannot do this:The user of this class is forced to use the static method that gets the internal instance. The internal instance is also declared static, because the static method needs access to it.In this case, both one and two refer to the same instance, and not two different ones.
[ March 01, 2002: Message edited by: Mike Curwen ]
Mike Curwen
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Joined: Feb 20, 2001
Posts: 3695

Moving this from Servlets -> Java in General (Beginners)
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Need help.....
 
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