15.5 匿名内部类

泛型还可以用于内部类以及匿名内部类

class Customer{

      private static long counter=1;

      private final long id=counter++;

     private Customer(){}

     public String toString(){return "Customer"+id;}

     public static Generator<Custom> generator(){

      return new Generator<Customer>(){

       public customer next(){return new Customer();}

};

}

class Teller{

   private static long counter=1;

   private final long id=counter++;

   private Teller(){}

   public String toString(){return "Teller"+id;}

   public staic Generator<Teller> generator=nw Generator<Teller>{

      public Teller next() { return new Teller();}

}

}