Develop a singleton class called ServiceProvider. Include in the class a static method called getInstance() modeled after the lazy initialization technique found in section 26.5 of Larman. Have ServiceProvider print Constructing ServiceProvider on its first construction and print ServiceProvider already exists on subsequent attempts at construction. Have your main() construct ServiceProvider three times sequentially using ServiceProvider.getInstance().

Design 4 classes: MyController to control the execution of the example, ExampleFactory (a singleton) to create a Service object, a Service class interface named IAService, a Service class named AService the implements IAService. Have MyController construct the ExampleFactory as a singleton as in program 1. Have MyController use the ExampleFactory method getService() to create an instance of AService. Have MyController use the method ProvideService() in AService to print Im now providing the service for MyController.