Optimize page: content/english/java/basic-comparison/_index.md - - Integrated primary keyword “compare excel files java” into title, description, first paragraph, and multiple headings.

- Added secondary keyword “compare pdf documents java” in headings and body text.
- Inserted a Quick Answers section for AI-friendly summarization.
- Added a comprehensive FAQ section addressing common developer questions.
- Updated front‑matter date and meta description for current relevance.
- Included trust signals (last updated, tested version, author) at the end.

Author: muqarrab-aspose