Simple Dagger2 (Pure Java)

Main.java

import dagger.Component;
import dagger.Module;
import dagger.Provides;

import javax.inject.Inject;

public class Main {
    public static void main(String[] args) {
        AnimalCry animalCry = new AnimalCry();
        animalCry.cry();
    }

    static class AnimalCry {
        @Inject
        Animal animal;

        AnimalCry() {
            AnimalComponent component = DaggerMain_AnimalComponent.builder().build();
            component.inject(this);
        }

        void cry() {
            System.out.println(animal.cry());
        }
    }

    interface Animal {
        String cry();
    }

    static class Cat implements Animal {
        @Override
        public String cry() {
            return "nya";
        }
    }

    // Module
    @Module
    static class AnimalModule {
        @Provides
        static Animal provideAnimal() {
            return new Cat();
        }
    }

    // Component
    @Component(modules = AnimalModule.class)
    interface AnimalComponent {
        void inject(AnimalCry animalCry);
    }
}