What does “bean X is injected into bean Y” mean in context of Spring framework?

Yes, The question is very basic. Dependency Injection is one of the fundamental functionality of Spring framework. Java classes should be independent as possible, this increases the flexibility to reuse the classes and testing classes independently.

For this decoupling, the dependency of one class to another class should be injected into them by a third party rather than the class itself creates the other object.

It basically just means that you created a bean with a name in your application context and use the reference of that bean as a property value for another bean definition.

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