add methods to controller

src/main/java/sbu/javafx/Launcher.java

@@ -4,6 +4,6 @@ import javafx.application.Application;
 
 public class Launcher {
     public static void main(String[] args) {
-        // TODO: Launch the JavaFX application by calling Application.launch(Main.class)    }
+        Application.launch(MusicApp.class, args);
     }
 }

src/main/java/sbu/javafx/MusicApp.java

@@ -16,7 +16,6 @@ public class MusicApp extends Application {
         Scene scene = new Scene(fxmlLoader.load());
         stage.setTitle("Music Player");
         stage.setScene(scene);
-        //TODO: add icon to the stage
         stage.show();
     }
 

src/main/java/sbu/javafx/MusicController.java

@@ -1,37 +1,85 @@
 package sbu.javafx;
 
+import javafx.beans.Observable;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
 import javafx.fxml.FXML;
 import javafx.event.ActionEvent;
+import javafx.scene.control.Button;
 import javafx.scene.control.Label;
+import javafx.scene.control.ListView;
 import javafx.scene.input.MouseEvent;
 import javafx.scene.layout.VBox;
 
+import java.io.File;
+
 public class MusicController {
 
-    // TODO: Define your UI components using the @FXML annotation.
+    @FXML Button playButton;
+    private boolean isPlaying = false;
+    @FXML private ListView<Song> musicListView;
+    private ObservableList<Song> musicList = FXCollections.observableArrayList();
+    private ObservableList<Song> playList = FXCollections.observableArrayList();
 
-    //TODO: Implement the logic to play a song. This method should update the UI to show which song is currently playing.
+    @FXML
+    public void initialize() {
+        File folder = new File("musics");
+        for (File file : folder.listFiles()) {
+            if (file.getName().endsWith(".mp3")) {
+                String[] str = file.getName().split("-");
+                String songName = str[0];
+                String artist = str[1];
+                musicList.add(new Song(songName,artist,file.getAbsolutePath()));
+            }
+        }
+
+        musicListView.setItems(musicList);
+    }
 
     @FXML
     public void handlePlayAction() {
-        //Update labels, change button icons, etc.
+        if (isPlaying) {
+            isPlaying = false;
+            playButton.setText("play");
+        }
+        else {
+            isPlaying = true;
+            playButton.setText("pause");
+        }
     }
 
     @FXML
-    public void handlePrevious() {}
+    public void handlePrevious() {
+        int currentIndex = musicListView.getSelectionModel().getSelectedIndex();
+        if (currentIndex > 0) {
+            musicListView.getSelectionModel().select(currentIndex - 1);
+            handlePlayAction();
+        }
+    }
 
     @FXML
-    public void handlenext() {}
+    public void handlenext() {
+        int currentIndex = musicListView.getSelectionModel().getSelectedIndex();
+        if (currentIndex < musicListView.getItems().size() - 1) {
+            musicListView.getSelectionModel().select(currentIndex + 1);
+            handlePlayAction();
+        }
+    }
 
-    //TODO: Logic to add a specific song to the user's playlist.
     @FXML
     public void addToPlaylist() {
-        //Add the song to a list or update a ListView.
+        Song song = musicListView.getSelectionModel().getSelectedItem();
+        if (song != null && !playList.contains(song)) {
+            playList.add(song);
+        }
     }
 
-    // TODO:This method should open a new window or change the current scene  to display the "Playlist" page.
-
+    @FXML
     public void openPlaylistWindow() {
-        //Create a new stage and show the playlist UI.
+        musicListView.setItems(playList);
+    }
+    @FXML
+    public void openAllSongs() {
+        musicListView.setItems(musicList);
     }
 }