Spring has an object called the "Bean Factory". This factory creates new objects, or rather, new Beans for us, without the need of instantiating via the new keyword. The factory reads off of a Spring configuration file, which can either be a XML file stored locally, or a class annotated with @Configuration at compile-time.
0 CommentsProblem By default, Spring will autowire beans by type. When a bean is created that depends on other beans, it will check for the existence of the required dependencies by types. Creating another bean of the same type will result in a very common exception: NoUniqueBeanDefinitionException.
0 Comments... Inversion of Control, is essentially a way of dealing with dependency injection. Frameworks like Spring are well known for this idea. In traditional control flows, a subclass may depend on another class for certain dependencies.
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