# Adapter Design Pattern — Java Example

**Pattern:** Structural → Adapter
**Article:** https://ankurm.com/adapter-design-pattern-java/

## What this example shows

Wraps a third-party `StripeClient` (with its own API) behind a `PaymentGateway` interface that your application code expects. The `OrderService` client never touches `StripeClient` directly — it only sees `PaymentGateway`. Swapping payment providers requires changing one line.

## How to run

```bash
# From this folder:
javac adapter/*.java
java adapter.Main
```

Requires Java 11+.

## Files

| File | Role |
|---|---|
| `PaymentGateway.java` | Target interface (what your app expects) |
| `StripeClient.java` | Adaptee (third-party SDK you can't modify) |
| `StripePaymentAdapter.java` | Adapter (bridges the two) |
| `OrderService.java` | Client (only uses PaymentGateway) |
| `Main.java` | Demo entry point |

## See Also

- Full article: https://ankurm.com/adapter-design-pattern-java/
- All design patterns: https://ankurm.com/design-patterns-java/