Erreur nom fichier

MAVENProject/src/main/java/loaders/Coffreloader.java

-package loaders;
-import map.Coffre;
-
-import javax.swing.*;
-import java.awt.*;
-import java.net.URL;
-
-public class CoffreLoader {
-
-    private Image imageCoffre;
-    private Coffre coffre;
-
-    public Image getImageCoffre() {
-        return imageCoffre;
-    }
-
-    public Coffre getCoffre() {
-        return coffre;
-    }
-
-    public CoffreLoader(Coffre obs, String nom){
-        String fn = "Coffre/";
-        URL url = CoffreLoader.class.getClassLoader().getResource(fn);
-        assert url != null;
-        String path = url.toString().substring(6)+"/"+nom;
-        coffre = obs;
-        imageCoffre = new ImageIcon(path).getImage();
-    }
-}