public class Bid
{
   private final Person bidder;
   private final long value;
   //konstruktor
   public Bid(Person bidder, long value)
   {
       this.bidder = bidder;
       this.value = value;
   }
   //Menampilkan nama sang penawar
   public Person getBidder()
   {
       return bidder;
   }
   //Menampilkan harga
   public long getBid()
   {
       return value;
   }
}