help me dear god

Code/ost/JAVA-FX-PROJECT/_javafx_website_task/src/main/java/com/example/ShopController.java

@@ -1,5 +1,7 @@
 package com.example;
 
+import java.io.IOException;
+
 import javafx.fxml.FXML;
 import javafx.scene.control.Button;
 import javafx.scene.control.Label;
@@ -71,9 +73,8 @@ public class ShopController {
     }
 
     @FXML
-    private void handleCartButton() {
-        System.out.println("Cart button clicked!");
-        // Logic for displaying the cart.
+    private void handleCartButton() throws IOException {
+        App.setRoot("cart");
     }
 
     @FXML