optimized sound management (fixed #4)

src/de/miaurizius/jgame2d/core/GamePanel.java

@@ -6,6 +6,7 @@ import de.miaurizius.jgame2d.entity.Entity;
 import de.miaurizius.jgame2d.entity.Player;
 import de.miaurizius.jgame2d.tile.TileManager;
 
+import javax.sound.sampled.Clip;
 import javax.swing.*;
 import java.awt.*;
 import java.util.ArrayList;
@@ -158,16 +159,20 @@ public class GamePanel extends JPanel implements Runnable {
 
     // MUSIC
     public void playMusic(int i) {
-        music.setFile(i);
-        music.play();
-        music.loop();
+        Clip c = se.clips[i];
+        if(c.isRunning()) c.stop();
+        c.setFramePosition(0);
+        c.start();
+        c.loop(Clip.LOOP_CONTINUOUSLY);
     }
     public void stopMusic() {
         music.stop();
     }
     public void playSE(int i) {
-        se.setFile(i);
-        se.play();
+        Clip c = se.clips[i];
+        if(c.isRunning()) c.stop();
+        c.setFramePosition(0);
+        c.start();
     }
 
     // SETTING THINGS UP