By default, whenever an application requires an instance of an object, Guice instantiates and returns it; but, in some cases, if the object creation process needs customization, then Guice providers do that. A provider interface takes after the conventional factory design in making objects. For instance, consider our ApplicationModule class binding process:
binder.bind(NotificationService.class).to(new SMSProvider());
By writing above line of code, SMSProvider class gives factory methods that will return objects of type NotificationService. Let's say we want to customize the object-making and maintenance process for the ServiceConnection class, which is shown as follows:
public class ServiceConnection { public void startService(){ ...
