Being a Full Stack Developer in Java means having expertise in both front-end (client-side) and back-end (server-side) web development using Java-based technologies. Here’s an overview of what a Full Stack Java Developer typically includes:

Front-End (Client-Side) Development:

1. HTML/CSS: Creating the structure (HTML) and styling (CSS) of web pages to define the user interface and layout.
2. JavaScript: Implementing client-side functionality and interactivity. Knowledge of JavaScript libraries and frameworks like Angular, React, or Vue.js may be required.
3. Responsive Design: Ensuring web applications are responsive and adapt well to various devices and screen sizes.
4. Front-End Frameworks: Using Java-based front-end frameworks like JavaServer Faces (JSF) or Thymeleaf, or integrating Java with JavaScript libraries for dynamic web experiences.

Back-End (Server-Side) Development:

1. Server-Side Programming: Developing the server-side logic and components of web applications using Java and Java-related technologies like Servlets, JSP (JavaServer Pages), or Spring Framework.
2. API Development: Creating APIs (Application Programming Interfaces) for communication between the front-end and back-end, often using RESTful or SOAP standards.
3. Database Management: Designing, creating, and managing databases using SQL databases (e.g., MySQL, PostgreSQL) or NoSQL databases (e.g., MongoDB) and integrating them with Java applications.
4. Authentication and Authorization: Implementing user authentication and authorization systems to secure access to protected resources.
5. Server Deployment: Deploying web applications to Java-based application servers (e.g., Apache Tomcat, WildFly, Spring Boot) or cloud platforms (e.g., AWS, Azure).
6. Server-Side Frameworks: Using Java frameworks such as Spring Boot, Java EE, or Jakarta EE for building server-side components, handling request routing, and managing application state.