package  com.zj.tickets;   public   enum  Destation {      BEIJING ,  SHANGHAI ,  TIANJING }

package  com.zj.tickets;   public   class  Ticket {      private   final   int   original ;      private   int   current ;      private   final  Destation  destation ;        public  Ticket( int  nums, Destation where) {         current  =  original  = nums;         destation  = where;     }        public   int  degress() {         return  -- current ;     }        public   int  original() {         return   original ;     }        public   boolean  soldout() {         return   current  <= 0;     }        public  Destation getDestation() {         return   destation ;     }        public   int  getCurrent() {         return   current ;     } }

package  com.zj.tickets; import  java.util.ArrayList; import  java.util.HashMap; import  java.util.List; import  java.util.Map; import  java.util.Random; import  java.util.concurrent.TimeUnit;   public   class  BookingOffice  implements  Runnable {      private   static  Map<Destation, Ticket>  tickets  =  new  HashMap<Destation, Ticket>();      private  Map<Destation, Integer>  records ;      private   static  List<BookingOffice>  offices  =  new  ArrayList<BookingOffice>();      private   int   ticketsSold  = 0;      private   final   int   id ;        // now today's tickets for sell:      static  {         tickets .put(Destation. BEIJING ,  new  Ticket(5, Destation. BEIJING ));         tickets .put(Destation. SHANGHAI ,  new  Ticket(5, Destation. SHANGHAI ));         tickets .put(Destation. TIANJING ,  new  Ticket(5, Destation. TIANJING ));     }        public  BookingOffice( int  id) {         this . id  = id;         offices .add( this );        resetRecords();     }        private   void  resetRecords() {         records  =  new  HashMap<Destation, Integer>();     }        private   void  addRecords(Destation d) {        Integer freq =  records .get(d);         records .put(d, freq ==  null  ? 1 : freq + 1);     }        public   void  run() {         int  transaction = 5;         while  (transaction-- > 0) {             // simulate a customer's coming:            Destation d = Destation.values()[ new  Random().nextInt(Destation                   .values(). length )];            print( this  +  "i want a ticket for "  + d);             // simulate the officer's checking:             try  {               TimeUnit. SECONDS .sleep(1);            }  catch  (InterruptedException e) {               e.printStackTrace();            }             // simulate the transaction:            Ticket wanted =  tickets .get(d);             synchronized  ( wanted ) {                if  (!wanted.soldout()) {                   print( this  +  "sold a ticket for "  + d);                   wanted.degress();                   addRecords(d);                   ++ ticketsSold ;                   print( this  +  ""  + d +  " tickets still have "                          + wanted.getCurrent());               }  else                   print( this  +  "tickets for "  + d +  " have been sold out." );            }        }        print( this  +  "closed" );        print( this  +  "totally sold tickets:"  +  ticketsSold  +  ",sell records:"               +  records );     }        public   synchronized   int  getValue() {         return   ticketsSold ;     }        public  String toString() {         return   "<Officce-"  +  id  +  ">" ;     }        static   void  print(String s) {        System. out .println(s);     } }

package  com.zj.tickets; import  java.util.concurrent.ExecutorService; import  java.util.concurrent.Executors;   public   class  Sell {      public   static   void  main(String[] args)  throws  Exception {        ExecutorService exec = Executors.newCachedThreadPool();         for  ( int  i = 0; i < 5; i++)            exec.execute( new  BookingOffice(i));        exec.shutdown();     } }