Factory Design Pattern

Factory Design Pattern in Java

Author: SadCatto

EmailNotification.java

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+public class EmailNotification implements Notification {
+    public void notifyUser() {
+        System.out.println("Email notif");
+    }
+}

Notification.java

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+public interface Notification {
+    void notifyUser();
+}

NotificationFactory.java

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+public class NotificationFactory {
+    Notification createNotification(String type) {
+        switch (type) {
+            case "SMS":
+                return new SMSNotification();
+            case "Email":
+                return new EmailNotification();
+            case "Push":
+                return new PushNotification();
+        }
+        return null;
+    }
+}

PushNotification.java

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+public class PushNotification implements Notification {
+    public void notifyUser() {
+        System.out.println("Push notif");
+    }
+}

SMSNotification.java

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+public class SMSNotification implements Notification {
+    public void notifyUser(){
+        System.out.println("SMS notif");
+    }
+}

Test.java

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+public class Test {
+    public static void main(String[] args) {
+        NotificationFactory nf = new NotificationFactory();
+        Notification sms = nf.createNotification("SMS");
+        Notification email = nf.createNotification("Email");
+        Notification push = nf.createNotification("Push");
+        sms.notifyUser();
+        email.notifyUser();
+        push.notifyUser();
+    }
+}