1.2 KiB
1.2 KiB
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
# From this folder:
javac adapter/*.java
java adapter.Main
Requires Java 25.
Files
| Post Section | File(s) |
|---|---|
| Step 1 — Define the Target Interface | PaymentGateway.java |
| Step 2 — The Adaptee (What You're Wrapping) | StripeClient.java |
| Step 3 — The Object Adapter | StripePaymentAdapter.java |
| Step 4 — The Client (Knows Nothing About Stripe) | OrderService.java |
| Putting It Together: The Main Demo | Main.java |
| Object Adapter vs Class Adapter | StripePaymentClassAdapter.java |
Note: the InputStreamReader JDK-adapter snippet is illustrative only — it is not part of this repository's runnable example.
See Also
- Full article: https://ankurm.com/adapter-design-pattern-java/
- All design patterns: https://ankurm.com/design-patterns-java/