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What is factory pattern? What is singlton pattern?

 
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I have some questions as :

1] What is factory pattern?
2] What is singlton pattern? , how will you code it ?
3] What is a builder pattern?
4] What is Session Facade and why it is used?
5] What is Template Pattern?
6] What is service Activator Pattern?
 
Rancher
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"prasad",
Welcome to the JavaRanch.

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thanks,
Dave
 
(instanceof Sidekick)
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Try Google for each of those patterns, eg "java singleton pattern", and see what you find. If the descriptions you find are confusing, ask more specific questions in the OO, UML, etc. forum further down the page.
 
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try http://patternshare.org

you ll get answers there
 
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Hi,

I think this question should be in "OO, Patterns, UML and Refactoring" forum

Tausif
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