Optimize page: content/english/java/document-loading/java-groupdocs-comparison-api-stream-document-compare/_index.md - - Updated title and description to include primary keyword “compare pdf java”.

- Added Quick Answers section for AI-friendly snippets.
- Inserted “What is compare PDF Java?” heading to satisfy H2 keyword requirement.
- Updated front‑matter date to 2026‑01‑26 and added trust‑signal block.
- Expanded introductory paragraph and added several contextual explanations while preserving all original links, code blocks, shortcodes, and images.

Author: muqarrab-aspose