Optimize page: content/english/java/document-information/extract-document-info-groupdocs-comparison-java/_index.md - - Updated title, description, and front‑matter date to target primary keyword.

- Integrated primary keyword “java get file type” in title, intro, H2, and body (4 occurrences).
- Added secondary keyword “java extract pdf metadata” in headings and content.
- Inserted Quick Answers section for AI‑friendly snippets.
- Added detailed FAQ section near the end.
- Included trust‑signal block with last updated date, tested version, and author.
- Expanded explanations, use‑case context, and best‑practice recommendations while preserving all original links, code blocks, and shortcodes.

Author: muqarrab-aspose