1.3 KiB
1.3 KiB
Decorator Design Pattern — Java Example
Pattern: Structural → Decorator Article: https://ankurm.com/decorator-design-pattern-java/
What this example shows
Builds a text-processing pipeline where behaviours (trim, uppercase, profanity filter) are stacked as wrapper objects around a PlainTextProcessor, all sharing the TextProcessor interface — the same idea behind new BufferedReader(new InputStreamReader(...)) in the JDK.
How to run
javac decorator/*.java -d out/decorator
java -cp out/decorator decorator.Main
Requires Java 25.
Post Section ↔ File Mapping
| Post Section | File(s) |
|---|---|
| Step 1 — Component Interface | TextProcessor.java |
| Step 2 — Concrete Component | PlainTextProcessor.java |
| Step 3 — Base Decorator | TextDecorator.java |
| Step 4 — Concrete Decorators | UpperCaseDecorator.java, TrimDecorator.java, ProfanityFilterDecorator.java |
| Stacking the Decorators — Order Matters | Main.java |
Note: the JDK InputStream/BufferedInputStream/GZIPInputStream snippet under "Decorator in the JDK: I/O Streams" is illustrative only — it is not part of this repository's runnable example.
Article: https://ankurm.com/decorator-design-pattern-java/ All patterns: https://ankurm.com/design-patterns-java/