Real-World Examples

Practical applications of polymorphism

6 min read

Real-World Polymorphism

Used heavily in enterprise systems like Spring Boot, payment gateways, and notification systems.

Code Examples

Enterprise-level polymorphism

java
1
2abstract class Notification {
3    abstract void send();
4}
5
6class EmailNotification extends Notification {
7    void send() {
8        System.out.println("Email sent");
9    }
10}
11
12class SmsNotification extends Notification {
13    void send() {
14        System.out.println("SMS sent");
15    }
16}
17
18Notification n = new EmailNotification();
19n.send();
20

Use Cases

  • Microservices
  • Spring dependency injection
  • Design patterns

Common Mistakes to Avoid

  • Hardcoding implementations
  • Ignoring abstraction