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2 cards from this section. Quick, good the night before a test.
What is Dependency Injection?
Think about how classes manage their required objects.
What is Constructor Injection?
Focus on how dependencies are passed when creating an object.
What is the primary benefit of Dependency Injection?
Think about how DI changes class relationships.
Using Constructor Injection allows for easier testing.
Consider the testing advantage of decoupled classes.
How would you refactor existing tightly coupled code to use manual Dependency Injection? Provide both before and after examples.
Look for instances where classes instantiate their dependencies.
Design a small Java application that uses manual DI for a scenario like a library management system. Include a Book, a Library, and a Borrower.
Focus on how each class can receive its dependencies through constructors.
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