Sync Factory Method, Abstract Factory, Builder, Prototype to Java 25; fix post/code mismatches

01-creational/factory-method/NotificationService.java

@@ -1,11 +1,24 @@
 package factorymethod;
 
-/** Creator - declares the factory method */
-public abstract class NotificationService {
-    protected abstract Notification createNotification();
+public class NotificationService {
 
-    public void notifyUser(String message) {
-        Notification n = createNotification();
-        n.send(message);
+    public void send(String type, String recipient, String message) {
+
+        // Creation logic mixed with business logic
+        Notification notification;
+        if ("EMAIL".equals(type)) {
+            notification = new EmailNotification();
+        } else if ("SMS".equals(type)) {
+            notification = new SmsNotification();
+        } else if ("PUSH".equals(type)) {
+            notification = new PushNotification();
+        } else {
+            throw new IllegalArgumentException("Unknown type: " + type);
+        }
+
+        // Business logic that should never change
+        System.out.println("Sending " + type + " to " + recipient);
+        notification.send(recipient, message);
+        System.out.println("Delivered.");
     }
 }