Optimize page: content/english/java/document-information/groupdocs-comparison-java-document-extraction/_index.md - - Updated title and meta description to include primary keyword “java get file type”.

- Added Quick Answers section for AI-friendly snippets.
- Inserted new H2 headings that naturally embed primary and secondary keywords.
- Expanded introduction, use‑case explanations, and added performance‑optimization guidance.
- Added trust signals (last updated, tested version, author) at the bottom.

Author: muqarrab-aspose