Java MCP Server examples are incomplete and non-runnable

Bug description

The current documentation examples for the Java MCP Server are incomplete and non-functional. Dependencies referenced in the code snippets cannot be resolved, and critical components (e.g., main class, configuration, or entry point) are missing. There is no working “Hello World” example to verify basic setup and functionality, making it impossible for new users to get started.

Environment

Spring MCP version: 0.16.0 with webflux implementation
Java version: Java 11
Build tool: Maven
IDE: Eclipse

Steps to reproduce

Go to the official Spring MCP documentation (e.g., https://modelcontextprotocol.io/sdk/java/mcp-server).
Copy the provided code snippets with webflux stateless into a new Java project.
Attempt to compile or run the code.
Observe unresolved dependencies

Expected behavior

The documentation should provide a complete, minimal, and runnable Java example that:

Includes all necessary dependencies (with Maven/Gradle snippets).
Contains a working demo example.
Demonstrates a basic “Hello World” endpoint or service.
Can be copied, pasted, and run immediately without additional research or guessing.
Minimal Complete Reproducible example

Comienza con la documentación de Java MCP Server en https://modelcontextprotocol.io/sdk/java/mcp-server y revisa los snippets de WebFlux sin estado, sus dependencias de Maven y la configuración o el punto de entrada que faltan. Se considera terminado cuando la documentación incluye un ejemplo mínimo completo de Hello World en Java 11, con dependencias resolubles y suficiente configuración para copiarlo, compilarlo y ejecutarlo sin más investigación.