Learning the Inversion of Control
Inversion of Control (IoC) and dependency injection (DI) are used interchangeably. IoC is achieved through DI. DI is the process of providing dependencies and IoC is the end result of DI. Spring's IoC container enforces the DI pattern for your components, and this leaves them loosely coupled and allows you to code to abstractions.
Dependency injection is a style of object configuration in which an object's fields and collaborators are set by an external entity. In other words, objects are configured by an external entity. Dependency injection is an alternative to having the object configure itself. This might sound a bit vague, so let's look at a simple example.
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