A hands-on LangChain4j starter tutorial for Java developers

On October 4, 2026, a post titled "LangChain4j Beginner's Hands-On Tutorial (Java Edition)" appeared on Juejin. According to its summary, LangChain4j is an LLM application development framework aimed at Java developers, and the tutorial walks through building AI Agent applications with it from scratch.

The article is positioned as an introductory, hands-on guide, and the summary describes it as suitable for Java backend developers to follow along. In the preface, the author states that he has been working with AI Agents for less than two weeks. He also notes that anyone familiar with his background knows he spent the past three years polishing products and did not work in AI, and that he has only recently entered AI development. He adds that corrections are welcome if there are mistakes.

The excerpt available stops at the preface. Beyond the author's self-description and the framework's positioning, it does not list the specific features covered, sample code, or results. As of this report, the story ends at the publication of the tutorial, with no further developments.