很多人第一次接触 Java，卡住的地方往往不是语法，而是「我代码写完了，怎么让它跑起来」。你打开编辑器敲下 System.out.println("Hello World");，保存成 .java 文件，然后在命令行里敲 javac，结果要么提示 'javac' 不是内部或外部命令，要么编译过了运行又报 找不到或 ...

Hello World 级别技能十分钟能跑通，但真正有价值的是把它组合成能协作的 AI 队友。 我试过最直接的路径：先跑通一个只打印系统信息的 Hello World，确认「触发 → 执行脚本 → 按模板返回」这条链路是通的，再把它升级成能约束 Java 代码风格的实战技能。

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