How do I bind Different Interfaces using Google Guice?-Collection of common programming errors

Take looks like the Robot Legs section, described in the Guice FAQ. “How to create a robot with a two Leg objects, the left one injected with a LeftFoot, and the right one with a RightFoot.” But only one Leg class that’s reused in both contexts.

There’s a PrivateModules solution. It uses two separate private modules, a @Left one and an @Right one. Each has a binding for the unannotated Foot.class and Leg.class, and exposes a binding for the annotated Leg.class:

class LegModule extends PrivateModule {
  private final Class