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Sync Composite to Java 25: H6 file labels, fix console output typo, README mapping

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Ankur
2026-06-24 14:30:27 +05:30
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# Composite Design Pattern — Java Example
**Pattern:** Structural → Composite
**Article:** https://ankurm.com/composite-design-pattern-java/
## What this example shows
Builds a file system tree where files (leaves) and directories (composites) share the same `FileSystemItem` interface. Callers compute size or print the tree without ever checking whether a node is a file or a directory.
## How to run
```bash
javac composite/*.java -d out/composite
java -cp out/composite composite.Main
```
Requires Java 25.
## Post Section ↔ File Mapping
| Post Section | File(s) |
|---|---|
| The Problem: Treating Leaves and Containers Uniformly | illustrative only — not part of this repository's runnable example |
| Step 1 — The Component Interface | `FileSystemItem.java` |
| Step 2 — The Leaf (File) | `File.java` |
| Step 3 — The Composite (Directory) | `Directory.java` |
| Building and Using the Tree | `Main.java` |
Article: https://ankurm.com/composite-design-pattern-java/
All patterns: https://ankurm.com/design-patterns-java/