What is the pattern used in log4j

Question

I needed to understand the design pattern used in the log4j library. Since it provides registrars for different classes, is this a factory?

Any other inputs / pointers to them are greatly appreciated.

Answer 1

Log4j uses a singleton design pattern, as it will have one instance of the class. check this out for reference http://www.oodesign.com/singleton-pattern.html

Answer 2

What kind of template do you mean? Creation, behavioral or structural?

, factory -pattern, , Ceki Gülcü ([e-mail], [e-mail] ), log4j, .

Answer 3

Log4j is a Singleton template that matches the development template.

Answer 4

It uses a mixture of design patterns, uses Singleton and Chain patterns.

I checked the e-learning site.