added shell sound

Projekte/battleship/client/src/main/java/pp/battleship/client/GameSound.java

@@ -34,6 +34,7 @@ public class GameSound extends AbstractAppState implements GameEventListener {
     private AudioNode splashSound;
     private AudioNode shipDestroyedSound;
     private AudioNode explosionSound;
+    private AudioNode shellFlyingSound;
 
     /**
      * Checks if sound is enabled in the preferences.
@@ -78,6 +79,7 @@ public class GameSound extends AbstractAppState implements GameEventListener {
         shipDestroyedSound = loadSound(app, "Sound/Effects/sunken.wav"); //NON-NLS
         splashSound = loadSound(app, "Sound/Effects/splash.wav"); //NON-NLS
         explosionSound = loadSound(app, "Sound/Effects/explosion.wav"); //NON-NLS
+        shellFlyingSound = loadSound(app, "Sound/Effects/shell_flying.wav");
     }
 
     /**
@@ -124,12 +126,27 @@ public class GameSound extends AbstractAppState implements GameEventListener {
             shipDestroyedSound.playInstance();
     }
 
+    /**
+     * Plays the shell flying sound effect.
+     */
+    public void shellFly() {
+        if (isEnabled() && shellFlyingSound != null) {
+            shellFlyingSound.playInstance();
+        }
+    }
+
+    /**
+     * Handles a recieved {@code SoundEvent} and plays the according sound.
+     * 
+     * @param event the Sound event to be processed
+     */
     @Override
     public void receivedEvent(SoundEvent event) {
         switch (event.sound()) {
             case EXPLOSION -> explosion();
             case SPLASH -> splash();
             case DESTROYED_SHIP -> shipDestroyed();
+            case SHELL_FLYING -> shellFly();
         }
     }
 }