If you have skills in Java you can contribute as much as you want !
- Report bugs in the Issues
- Refactor / Clean up the code
- Add new features (When creating a new feature, please write tests for your feature and provide good documentation)
- Fork the repository
- Do what you want to add or modify
- Do a Pull Request
Note: Modifications of Markdown files, LICENSE, or any files that aren't code does not count !