A Java Full Stack Developer needs to be proficient in a variety of technologies and tools that span the entire web application development stack. Below is a comprehensive list of technologies and tools that are typically associated with a Java Full Stack Developer:

Frontend (Client-Side):

1. HTML/CSS/JavaScript: Fundamental building blocks for web development.
2. Frameworks and Libraries:
   • React: A JavaScript library for building user interfaces.
   • Angular: A platform and framework for building client-side applications.
   • Vue.js: A progressive framework for building user interfaces.
3. Package Managers:
   • npm: The package manager for JavaScript.
   • Yarn: A dependency manager that also serves as a project manager.
4. Build Tools:
   • Webpack: A module bundler.
   • Babel: A JavaScript compiler.
5. CSS Preprocessors:
   • Sass: A stable, powerful, and professional grade CSS extension.
   • LESS: A backward-compatible language extension for CSS.

Backend (Server-Side):

1. Java: The core programming language.
2. Frameworks:
   • Spring Boot: An open-source Java-based framework used to create stand-alone, production-grade Spring-based applications.
   • Hibernate: A framework for the Java programming language for mapping an object-oriented domain model to a relational database.
3. Build Tools:
   • Maven: A software project management and comprehension tool.
   • Gradle: An open-source build automation system.
4. Application Servers:
   • Tomcat: An application server from the Apache Software Foundation.
   • WildFly: Formerly known as JBoss, an application server authored by JBoss.
5. APIs and Middleware:
   • RESTful Services: An architectural style for distributed systems.
   • WebSocket: A communication protocol providing full-duplex channels over a single TCP connection.

Databases:

1. Relational Databases:
   • MySQL: An open-source relational database.
   • PostgreSQL: A free and open-source relational database.
   • Oracle: A commercial relational database.
2. NoSQL Databases:
   • MongoDB: A document-oriented NoSQL database.
   • Cassandra: A highly scalable, distributed NoSQL database.

Version Control:

1. Git: A free and open-source distributed version control system.
2. GitHub, GitLab, Bitbucket: Platforms to host and review code, manage projects, and collaborate.

Other Essential Tools & Technologies:

1. Docker: A platform to develop, ship, and run applications inside containers.
2. Kubernetes: An open-source container orchestration platform.
3. CI/CD Tools: Jenkins, Travis CI, CircleCI, etc.

Testing:

1. JUnit: A testing framework for Java.
2. Mockito: A mocking framework for Java.
3. Selenium: A tool for controlling web browsers through programs and performing browser automation.

Being familiar with these technologies can equip a Java Full Stack Developer to handle various responsibilities from the frontend to the backend. However, the exact set of technologies a developer should know can vary based on the specific requirements of a project or a company.