Dagger 2 : Cannot resolve symbol for dagger component

Question

I would like to exercise this Dagger 2 Vehicle Motor example.

I made everything exact like in that tutorial, except for my gradel.build:

compile 'com.google.dagger:dagger:2.4'
apt 'com.google.dagger:dagger-compiler:2.4'
compile 'javax.annotation:javax.annotation-api:1.2'

but then I get an

error: cannot find symbol variable Dagger_VehicleComponent

Whats wrong there? (Same without '_' underscore)

Answer 1

Another version solved it:

compile 'com.google.dagger:dagger:2.2'
apt 'com.google.dagger:dagger-compiler:2.2'
provided 'javax.annotation:jsr250-api:1.0'