package org.apidesign.samples;

 /** Showing some horrible usages of singletons.

  */

 public class Singletons {

     static {

         // BEGIN: singleton.no.no

         /** initialize singletons */

         Database.init();

         OfflineQueue.init();

         CreditCardProcessor.init();

         /** use singletons */

         CreditCard c =  new CreditCard(

           "1234 5678 9012 3456", 5, 2008

         );

         c.charge(100);

         // END: singleton.no.no

     }

     static final class Database {

         public static void init() {

         }

     }

     static final class OfflineQueue {

         public static void init() {

         }

     }

     static final class CreditCardProcessor {

         public static void init() {

         }

     }

     private static class CreditCard {

         public CreditCard(String card, int month, int year) {

         }

         private void charge(int amount) {

         }

     }

 }