ADD file via upload

MusicPlayer.java

@@ -0,0 +1,69 @@
+package cn.edu.caztc.sokobangame;
+
+import javax.sound.sampled.*;
+import java.io.File;
+
+public class MusicPlayer {
+    private static MusicPlayer instance;
+    private Clip clip;
+    private int currentTrackIndex = -1;
+    private boolean isMuted = true;
+    
+    public int getCurrentTrackIndex() {
+        return currentTrackIndex;
+    }
+    
+    private MusicPlayer() {}
+
+    public static synchronized MusicPlayer getInstance() {
+        if (instance == null) {
+            instance = new MusicPlayer();
+        }
+        return instance;
+    }
+
+    public void playMusic(int index) {
+        if (index < 0 || index >= MapConfig.MUSIC_FILES.length) return;
+        
+        stopMusic();
+        currentTrackIndex = index;
+        isMuted = false;
+        
+        try {
+            AudioInputStream audioInput = AudioSystem.getAudioInputStream(
+                new File(MapConfig.MUSIC_PATH + MapConfig.MUSIC_FILES[index]));
+            clip = AudioSystem.getClip();
+            clip.open(audioInput);
+            clip.loop(Clip.LOOP_CONTINUOUSLY);
+            clip.start();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    public void stopMusic() {
+        if (clip != null && clip.isRunning()) {
+            clip.stop();
+            clip.close();
+        }
+        isMuted = true;
+    }
+
+    public void toggleMute() {
+        if (isMuted) {
+            playMusic(currentTrackIndex);
+        } else {
+            stopMusic();
+        }
+    }
+
+    public void nextTrack() {
+        if (currentTrackIndex == -1) return;
+        int newIndex = (currentTrackIndex + 1) % MapConfig.MUSIC_FILES.length;
+        playMusic(newIndex);
+    }
+
+    public boolean isMuted() {
+        return isMuted;
+    }
+}