How do I add pictures using JavaFX?

I'm trying to use ImageView to add a picture in my JavaFX application. So far I have the following implementation that is throwing a InvocationTargetException. Is there something wrong with my implementation?

public class TowerDefense extends Application {
    @Override public void start(Stage stage) {
    // load the image
         Image image = new Image("MapCropped.png");

         //displays ImageView image
         ImageView one = new ImageView();
         one.setImage(image);
         HBox box = new HBox();
         box.getChildren().add(one);
         Scene scene = new Scene(box);

         stage.setTitle("Balloon Tower Defense");
         stage.setWidth(415);
         stage.setHeight(200);
         stage.setScene(scene);
         stage.sizeToScene();
         stage.show();
     }

}