Suggest an editImprove this articleRefine the answer for “Why is Composite often used in file systems?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)**Composite** is often applied in file systems because **their structure is hierarchical**, and files and folders need to be **handled the same way**. **Key point:** both files and folders implement the same interface, which lets you call the same methods without checking the type.Shown above the full answer for quick recall.Answer (EN)Image**Composite** is often applied in file systems because **their structure is hierarchical**, and files and folders need to be **handled the same way**. --- ### 1. **A Natural Tree Structure** Folders contain other elements (files and subfolders), while files are terminal nodes. This is the classic "container + elements" model, a perfect fit for Composite. --- ### 2. **A Single Interface for Operations** Both files and folders implement the same interface, for example: ```java interface FileSystemItem { void showInfo(); } ``` This lets you call the same methods without checking the type: ```java item.showInfo(); // works for both a file and a folder ``` --- ### 3. **Recursive Actions** Composite simplifies operations that must run recursively: deleting a folder, computing its size, searching. Each element decides for itself how to handle the request: a leaf performs the action, a container delegates it to its children. --- ### 4. **Extensibility** You can easily add new element types (for example, an archive or a symbolic link), as long as they support the same interface.For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.