JavaGuide

Why we included this project

JavaGuide has been around long enough to become a standard stop for Java backend developers prepping for interviews, and it has grown well past Java itself. The repo holds thousands of pages of notes covering the language core, collections, concurrency, the JVM, Spring, MySQL, Redis, distributed systems, high-concurrency design, and system design, and a newer section now reaches into AI application development with LLMs, agents, RAG, and MCP. What separates it from a random link dump is the structure: a recommended backend interview plan, learning roadmaps, resume guidance, and curated question summaries that take you from fundamentals to advanced scenarios. It is a curated knowledge index rather than runnable software, so the value is in the editorial organization and the breadth of frequently updated content. For anyone building a study plan around Java backend engineering and the AI-adjacent skills employers now expect, it is a practical companion.