Constructor Injection

Constructor injection is a method used in software development to supply an object with its dependencies directly through its constructor (the special method used to create an object). Think of it like setting up a new appliance with all its necessary parts at the time of purchase; the constructor requires certain components (dependencies) to function properly. This approach makes the object’s needs clear from the start and improves code maintainability and testability. By injecting dependencies via the constructor, you ensure the object always has what it needs from creation, reducing errors and making the system more flexible.