Notification System in Java: Explanation & Practice

Problem summary

Create Notification interface with Email, SMS, Push implementations.

Starter code

// interface Notifiable: send(String message)
// EmailNotification: sends via email
// SMSNotification: sends via SMS
// PushNotification: sends via push

public class Main {
    public static void main(String[] args) {
        // Send notification via each channel
        // Print: [Type] Sent: <message>
    }
}

Expected output and test cases

• Email notification

  [Email] Sent: Hello

• SMS notification

  [SMS] Sent: Alert

• Push notification

  [Push] Sent: Update

Hints

1. Interface defines send() contract
2. Each class formats output differently
3. Use polymorphism to call correct send()

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