How is the object integrated into Dagger for dependency injection?

In Dagger, dependency injection occurs through annotations and code generation.

Main steps:

1. Defining a module (@Module) — a class that provides dependencies using methods annotated with @Provides.

2. Component (@Component) — an interface that connects modules and dependency injection sites.

3. Injection (@Inject) — fields or constructors where Dagger will supply dependencies.

Example of constructor injection:

class Engine {
    @Inject
    Engine() {}
}

class Car {
    private final Engine engine;

    @Inject
    Car(Engine engine) {
        this.engine = engine;
    }
}

@Component
interface CarComponent {
    Car getCar();
}

Here, Dagger will automatically create an Engine object and inject it into Car when creating it via CarComponent.

Thus, dependency injection in Dagger is performed through the @Inject annotation and is connected via components and modules.