001package headfirst.singleton.chocolate; 002 003public class ChocolateController { 004 public static void main(String args[]) { 005 ChocolateBoiler boiler = ChocolateBoiler.getInstance(); 006 boiler.fill(); 007 boiler.boil(); 008 boiler.drain(); 009 010 // will return the existing instance 011 ChocolateBoiler boiler2 = ChocolateBoiler.getInstance(); 012 } 013}