feat: adding exception in lesson14 homework by Yemi

lesson_14/exceptions/exceptions_app/src/main/java/com/codedifferently/lesson14/ecommerce/EcommerceSystem.java

@@ -17,19 +17,30 @@ public void addProduct(String productId, String name) {
     products.put(productId, new Product(productId, name));
   }
 
-  public String placeOrder(String productId, int quantity) {
+  public String placeOrder(String productId, int quantity) throws ProductNotFoundException {
     Product product = products.get(productId);
+    if (product == null) {
+      throw new ProductNotFoundException("Product with ID " + productId + " not found");
+    }
     String orderId = UUID.randomUUID().toString();
     orders.put(orderId, new Order(orderId, product, quantity));
     return orderId;
   }
 
-  public void cancelOrder(String orderId) {
+  public void cancelOrder(String orderId) throws OrderNotFoundException {
+    Order order = orders.get(orderId);
+    try {
+      if (order == null)
+        throw new OrderNotFoundException("Order with order ID " + orderId + " does not exist");
+    } catch (OrderNotFoundException e) {
+      System.out.println("Order with order ID " + orderId + " does not exist");
+    }
     orders.remove(orderId);
   }
 
-  public String checkOrderStatus(String orderId) {
+  public String checkOrderStatus(String orderId) throws OrderNotFoundException {
     Order order = orders.get(orderId);
+    if (order == null) throw new OrderNotFoundException("Order with ID " + orderId + " not found");
     return "Order ID: "
         + orderId
         + ", Product: "

lesson_14/exceptions/exceptions_app/src/main/java/com/codedifferently/lesson14/ecommerce/OrderNotFoundException.java

@@ -1,8 +1,7 @@
-/*
- * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
- * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
- */
-
 package com.codedifferently.lesson14.ecommerce;
 
-class OrderNotFoundException {}
+class OrderNotFoundException extends RuntimeException {
+  public OrderNotFoundException(String message) {
+    super(message);
+  }
+}

lesson_14/exceptions/exceptions_app/src/main/java/com/codedifferently/lesson14/ecommerce/ProductNotFoundException.java

@@ -1,8 +1,7 @@
-/*
- * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
- * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
- */
-
 package com.codedifferently.lesson14.ecommerce;
 
-class ProductNotFoundException {}
+class ProductNotFoundException extends RuntimeException {
+  public ProductNotFoundException(String message) {
+    super(message);
+  }
+}