Music Organizer dan Auction

Nama : Yasinta Yusniawati
NRP   : 05111740000054
Kelas : PBO - B

Tugas minggu ini adalah membuat program "Music Organizer dan Auction (Lelang)".

1. Music Organizer

• Class yang dibutuhkan :

• Source code :

           - MusicOrganizer

/**   
  * Music Organizer
  * Yasinta Yusniawati
  * 14 Oktober 2018
  */   
  import java.util.ArrayList;   
  public class MusicOrganizer   
  {   
   private ArrayList<String> files;   
   private MusicPlayer player;   
   // membuat music organizer   
   public MusicOrganizer()   
   {   
    files = new ArrayList<String>();   
    player = new MusicPlayer();   
   }   
   //nambah file   
   public void tambahFile(String namafile)   
   {   
    files.add(namafile);   
   }   
   // input jumlah file pada koleksi   
   public int jumlahFile()   
   {   
    return files.size();   
   }   
   // list file pada koleksi   
   public void listFile()   
   {   
    if(files.size()>0)   
    {   
     for(int i=0;i<files.size();i++){
        String namafile = files.get(i);   
        System.out.println("Daftar putar " + (i+1) + ": " + namafile);   
    }
    System.out.println("\n");
    }   
   }   
   // hapus file dari koleksi   
   public void hapusFile(int index)   
   {   
    if(index >= 0 && index < files.size())   
    {   
     files.remove(index-1);   
    }   
   }   
   public void startPlaying(int index)   
   {   
    String namafile = files.get(index-1);   
    player.startPlaying(namafile);    
   }   
   public void stopPlaying()   
   {   
    player.stopPlaying();   
   }   
  }   

        - MusicPlayer

/**  
  *MusicPlayer  
  * Yasinta Yusniawati
  * 14 Oktober 2018  
  */  
  
  public class MusicPlayer   
  {   
   private String music;   
   public MusicPlayer()   
   {   

   public void stopPlaying()   

music = null;   
   }   
   public void startPlaying(String namafile)   
   {   
    music = namafile;   
    System.out.println(music+ "---[Playing]");   
   }   
   {   
    System.out.println("(Stop)");   
   }   
  }   

      - Cara menggunan :

• Daftar lagu sebelum dimasukkan adalah kosong untuk memutar musiknya kita harus memasukkan nama lagu lerlebih dahulu sebanyak jumlah musik yang di inginkan 

• Jika ingin memutar lagu yang telah di masukkan daftar putar maka ketikan urutan lagu yang di inginkan

• Musik yang di inginkan akan diputar

• Jika menginginkan lagunya berhenti, klik fungsi stopPlaying 

2. Auction

• Class Auction

import java.util.ArrayList;  
 /**  
  * Auction
  * Yasinta Yusniawati
  * 14 Okt 2018
  */  
 public class Auction  
 {  
   // The list of Lots in this auction.  
   private ArrayList<Lot> lots;  
   // The number that will be given to the next lot entered  
   // into this auction.  
   private int nextLotNumber;  
    
   public Auction()  
   {  
     lots = new ArrayList<>();  
     nextLotNumber = 1;  
   }  
  
   public void enterLot(String description)  
   {  
     lots.add(new Lot(nextLotNumber, description));  
     nextLotNumber++;  
   }  
     
   public void showLots()  
   {  
     System.out.println("Barang yang dilelang:");
     for(Lot lot : lots) {
       System.out.println(lot.toString());  
     }  
   }  
    
   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("Penawaran untuk barang nomor  " +  
                   lotNumber + " berhasil.");  
       }  
       else {  
         // Report which bid is higher.  
         Bid highestBid = selectedLot.getHighestBid();  
         System.out.println("Barang nomor" + lotNumber +  
                   " sudah dilelang dengan harga: " +  
                   highestBid.getValue());  
       }  
     }  
   }  
    
   public Lot getLot(int lotNumber)  
   {  
     if((lotNumber >= 1) && (lotNumber < nextLotNumber)) {  
       // The number seems to be reasonable.  
       Lot selectedLot = lots.get(lotNumber - 1);  
       // Include a confidence check to be sure we have the  
       // right lot.  
       if(selectedLot.getNumber() != lotNumber) {  
         System.out.println("Internal error: Lot number " +  
                   selectedLot.getNumber() +  
                   " was returned instead of " +  
                   lotNumber);  
         // Don't return an invalid lot.  
         selectedLot = null;  
       }  
       return selectedLot;  
     }  
     else {  
       System.out.println("Lot number: " + lotNumber +  
                 " does not exist.");  
       return null;  
     }  
   }  
 }  

• Class Lot

/**  
  * Auction - Lot
  * Yasinta Yusniawati
  * 14 Okt 2018 
  */  
 public class Lot  
 {  
   // A unique identifying number.  
   private final int number;  
   // A description of the lot.  
   private String description;  
   // The current highest bid for this lot.  
   private Bid highestBid;  
    
   public Lot(int number, String description)  
   {  
     this.number = number;  
     this.description = description;  
     this.highestBid = null;  
   }  
   
   public boolean bidFor(Bid bid)  
   {  
     if(highestBid == null) {  
       // There is no previous bid.  
       highestBid = bid;  
       return true;  
     }  
     else if(bid.getValue() > highestBid.getValue()) {  
       // The bid is better than the previous one.  
       highestBid = bid;  
       return true;  
     }  
     else {  
       // The bid is not better.  
       return false;  
     }  
   }  
 
   public String toString()  
   {  
     String details = number + ": " + description;  
     if(highestBid != null) {  
       details += "  Dengan harga: " +   
             highestBid.getValue();  
     }  
     else {  
       details += "  (No bid)";  
     }  
     return details;  
   }  
   
   public int getNumber()  
   {  
     return number;  
   }  
  
   public String getDescription()  
   {  
     return description;  
   }  
 
   public Bid getHighestBid()  
   {  
     return highestBid;  
   }  
 }  

• Class Person

 /**  
  * Auction - Person
  * Yasinta Yusniawati
  * 14 Okt 2018   
  */  
 public class Person  
 {  
   // The name of this person.  
   private final String name;  
   
   public Person(String name)  
   {  
     this.name = name;  
   }  
    
   public String getName()  
   {  
     return name; 
   }  
 }  

• Class Bid

/**  
  * Auction - Bid
  * Yasinta Yusniawati
  * 14 Okt 2018  
  */  
 public class Bid  
 {  
   // The person making the bid.  
   private final Person bidder;  
   
   private final long value;  
    
   public Bid(Person bidder, long value)  
   {  
     this.bidder = bidder;  
     this.value = value;  
   }  
   
   public Person getBidder()  
   {  
     return bidder;  
   }  
   
   public long getValue()  
   {  
     return value;  
   }  
 }  

• Hasil :