Tugas PBO B Music Organizer

Oktober 09, 2018

Kali ini saya akan membahas tugas untuk membuat music organizer sederhana melalui Blue J.

Saya menggunakan beberapa class, 2 diantaranya yaitu music organizer class & music player class, sisanya saya import dari java.jar.

Dibawah ialah source code beserta screenshotnya

Class music player

 import java.io.BufferedInputStream;// panggil class melalui +libs  
 import java.io.FileInputStream;// fungsi class library bisa diunduh di internet  
 import java.io.InputStream;  
 import java.io.IOException;  
 import javazoom.jl.decoder.JavaLayerException;  
 import javazoom.jl.player.AudioDevice;  
 import javazoom.jl.player.FactoryRegistry;  
 import javazoom.jl.player.advanced.AdvancedPlayer;  
 /**  
  * @author (Vinsensius Yuda P)  
  * @version (1.0.0)  
  */  
 public class MusicPlayer  
 {  
   ///player music awalnya masih kosong  
   private AdvancedPlayer player;  
   //membuat object class music player  
   public MusicPlayer()  
   {  
     player = null;  
   }  
   public void playSample(String filename)  
   {  
     try {  
       setupPlayer(filename);  
       player.play(500);  
     }  
     catch(JavaLayerException e) {  
       reportProblem(filename);  
     }  
     finally {  
       killPlayer();  
     }  
   }    
   /**  
    * mulai memain setelah diberi file musik  
    */  
   public void startPlaying(final String filename)  
   {  
     try {  
       setupPlayer(filename);  
       Thread playerThread = new Thread() {  
         public void run()  
         {  
           try {  
             player.play(5000);  
           }  
           catch(JavaLayerException e) {  
             reportProblem(filename);  
           }  
           finally {  
             killPlayer();  
           }  
         }  
       };  
       playerThread.start();  
     }  
     catch (Exception ex) {  
       reportProblem(filename);  
     }  
   }  
   public void stop()  
   {  
     killPlayer();  
   }  
   /**  
    * player siap memutarkan musik yang ada di list.  
    */  
   private void setupPlayer(String filename)  
   {  
     try {  
       InputStream is = getInputStream(filename);  
       player = new AdvancedPlayer(is, createAudioDevice());  
     }  
     catch (IOException e) {  
       reportProblem(filename);  
       killPlayer();  
     }  
     catch(JavaLayerException e) {  
       reportProblem(filename);  
       killPlayer();  
     }  
   }  
   private InputStream getInputStream(String filename)  
     throws IOException  
   {  
     return new BufferedInputStream(  
           new FileInputStream(filename));  
   }  
   /**  
    * buat audiodevice  
    */  
   private AudioDevice createAudioDevice()  
     throws JavaLayerException  
   {  
     return FactoryRegistry.systemRegistry().createAudioDevice();  
   }  
   /**  
    * matikan player apa bila lagu selesai  
    */  
   private void killPlayer()  
   {  
     synchronized(this) {  
       if(player != null) {  
         player.stop();  
         player = null;  
       }  
     }  
   }  
   /**  
    * apabila ada masalah buat report   
    */  
   private void reportProblem(String filename)  
   {  
     System.out.println("There was a problem playing: " + filename);  
   }  
 }

Class music organizer

 import java.util.ArrayList;  
 /**  
  * @author (Vinsensius Yuda P)  
  * @version (1.0.0)  
  */  
 public class MusicOrganizer  
 {  
   // sebuah arraylist untuk mentimpan nama file musik  
   private ArrayList<String> files;  
   // class musicplayer  
   private MusicPlayer player;  
   /**  
    * membuat sebuah music organizer  
    */  
   public MusicOrganizer()  
   {  
     files = new ArrayList<>();  
     player = new MusicPlayer();  
   }  
   /**  
    * menembahkan sebuah file ke koleksi  
    */  
   public void addFile(String filename)  
   {  
     files.add(filename);  
   }  
   /**  
    * return file ke koleksi  
    */  
   public int getNumberOfFiles()  
   {  
     return files.size();  
   }  
   /**  
    * list sebuah file dari koleksi  
    */  
   public void listFile(int index)  
   {  
     if(index >= 0 && index < files.size()) {  
       String filename = files.get(index);  
       System.out.println(filename);  
     }  
   }  
   /**  
    * remove file di list/koleksi  
    */  
   public void removeFile(int index)  
   {  
     if(index >= 0 && index < files.size()) {  
       files.remove(index);  
     }  
   }  
   /**  
    * mulai memainkan file musik yang ada di list  
    */  
   public void startPlaying(int index)  
   {  
     String filename = files.get(index);  
     player.startPlaying(filename);  
   }  
   /**  
    * hentikan player musik  
    */  
   public void stopPlaying()  
   {  
     player.stop();  
   }  
 }

jangan lupa download javazoom untuk mengimport clas tambahan lalu taruh di folder +libs pada projectnya