How we can implement dependency injection?

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Accepted Answer

Dependency injection is a design pattern that allows objects to be loosely coupled by injecting their dependencies from external sources.

Dependency injection helps in achieving inversion of control and promotes modular and testable code.
There are three common ways to implement dependency injection: constructor injection, setter injection, and interface injection.
Constructor injection involves passing dependencies through a class's constructor.
Setter injection involves setting dependencies through setter methods.
Interface injection involves implementing an interface that defines methods for injecting dependencies.
Frameworks like Spring provide built-in support for dependency injection.
Example: In Java, we can use the @Autowired annotation to inject dependencies.

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