Spring's IoC

Spring Framwork is promoting loose coupling through a inversion of control (IoC). A powerful idea. When IoC is applied, objects are passively given their dependencies instead of creating or looking for dependent objects for themselves. This defers the architectural decisions to be taken at later point of time. In other terms, my class need not know what kind of implementation being injected by framework. The injected object can be remote object or local object. It could be a web service, EJB or an RMI object.