To what extent should we use Factory pattern

[raj malhotra]

Hi All
I have generic question.Normally project consists of numerous classes.According to design patterns we should not instantiate concrete classes in the code.So do you suggest to create factory class for each and every class in the application.

[Benjamin Winterberg]

Hi raj,

yes, you should avoid to instantiate concrete classes in the code. Creating multiple factories is one way but theres another much simplier approach. You could use some IoC container (Inversion of Control) for injecting the dependancies to the conrete classes into your application.

Take a look at the spring framework.

[raj malhotra]

Hi Ben.Welcome to javaranch
and thanks I will check it out this.