Auction

Nama : Edgar Andrew Hutauruk
NRP : 05111740000166
Kelas : PBO-B

Auction

 import java.util.ArrayList;    
 /**  
  * Write a description of class Auction here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class Auction   
 {   
   private ArrayList<Lot> lots;   
   private int nextLotNumber;   
   //Constructor   
   public Auction()   
   {   
     lots = new ArrayList<Lot>();   
     nextLotNumber = 1;   
   }   
   //Mendaftarkan lot baru   
   public void enterLot(String description)   
   {   
     lots.add(new Lot(nextLotNumber, description));   
     nextLotNumber++;   
   }   
   //Print Semua Lot   
   public void showLots()   
   {   
     for(Lot lot : lots)   
     {   
       System.out.println(lot.toString());   
     }   
   }   
   //Melakukan Bid pada suatu Lot   
   public void makeABid(int lotNumber, Person bidder, long value)   
   {   
     Lot selectedLot = getLot(lotNumber);   
     if(selectedLot != null) {   
       Bid bid = new Bid(bidder, value);   
       boolean successful = selectedLot.bidFor(bid);   
       if(successful)   
       {   
         System.out.println("Bid untuk Lot pada urutan " + lotNumber + " sukses didaftarkan.");   
       }   
       else   
       {   
         Bid highestBid = selectedLot.getHighestBid();   
         System.out.println("Lot urutan ke: " + lotNumber + " memiliki Bid sebesar: " + highestBid.getValue());   
       }   
     }   
   }   
   //Mencari Lot yang terdaftar   
   public Lot getLot(int lotNumber)   
   {   
     if((lotNumber >= 1) && (lotNumber < nextLotNumber))   
     {   
       Lot selectedLot = lots.get(lotNumber-1);   
       if(selectedLot.getNumber() != lotNumber) {   
         System.out.println("Internal error: Lot urutan ke " +selectedLot.getNumber() + " dimunculkan, sebagai ganti dari " +lotNumber);   
         selectedLot = null;   
       }   
       return selectedLot;   
     }   
     else   
     {   
       System.out.println("Lot urutan ke: " + lotNumber +" tidak ditemukan.");   
       return null;   
     }   
   }   
   public void close()    
   {    
     System.out.println("Closing auction.");    
     for (Lot lot : lots)    
     {     
       System.out.println(lot.getNumber() + ": " + lot.getDescription());    
       if (lot.getHighestBid() == null)    
       {    
         System.out.println (" (No bids) ");    
       }    
       else    
       {    
         Bid highestBid = lot.getHighestBid();    
         System.out.println(" sold to " + highestBid.getBidder().getName() + " for " + highestBid.getValue());    
       }    
     }    
   }     
 }   

Lot

 /**  
  * Write a description of class Lot here.  
  *  
  * @author (Edgar Andrew Hutauruk)  
  * @version (a version number or a date)  
  */  
 public class Lot   
 {   
   //ID Lot   
   private final int number;   
   //Deskripsi dari sebuah Lot   
   private String description;   
   //Bid tertinggi dari Lot   
   private Bid highestBid;   
   //Constructor   
   public Lot(int number, String description)   
   {   
     this.number = number;   
     this.description = description;   
     this.highestBid = null;   
   }   
   public boolean bidFor(Bid bid)   
   {   
     if(highestBid == null)   
     {   
       //Bid belum ada   
       highestBid = bid;   
       return true;   
     }   
     else if(bid.getValue() > highestBid.getValue())   
     {   
       //Bid lebih besar dari nilai Bid sebelumnya   
       highestBid = bid;   
       return true;   
     }   
     else   
     {   
       //Bid lebih kecil dari nilai Bid sebelumnya   
       return false;   
     }   
   }   
   //Deskripsi rincian Lot   
   public String toString()   
   {   
     String details = number + ": " + description;   
     if(highestBid != null)   
     {   
       details += " Bid: " +   
        highestBid.getValue();   
       }   
       else   
       {   
       details += " (No bid)";   
     }   
     return details;   
   }   
   //Return ID Lot   
   public int getNumber()   
   {   
     return number;   
   }   
   //Return Deskripsi Lot   
   public String getDescription()   
   {   
     return description;   
   }   
   //Return Bid tertinggi   
   public Bid getHighestBid()   
   {   
     return highestBid;   
   }   
 }   

Bid

 /**  
  * Write a description of class Bid here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class Bid   
 {   
   //variable yang hanya bisa diinisialisasi 1 kali   
   private final Person biddername;   
   private final long value;   
   public Bid(Person name, long v)   
   {   
     this.biddername = name;   
     this.value = v;   
   }   
   //value nama bidder   
   public Person getBidder()   
   {   
     return biddername;   
   }   
   //value berupa nilai bid   
   public long getValue()   
   {   
     return value;   
   }   
 }   

Person

 /**  
  * Write a description of class Person here.  
  *  
  * @author (your name)  
  * @version (a version number or a date)  
  */  
 public class Person   
 {   
   //variable final untuk nama orang (1 kali inisialisasi)   
   private final String personname;   
   //constructor   
   public Person(String name)   
   {   
     this.personname = name;   
   }   
   //value berupa nama orang   
   public String getName()   
   {   
      return personname;   
   }   
 }