> For the complete documentation index, see [llms.txt](https://ldbmcs.gitbook.io/java/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ldbmcs.gitbook.io/java/java-37.md).

# Java

- [Java 基础](https://ldbmcs.gitbook.io/java/java-37/java-ji-chu.md)
- [为什么要有抽象类？](https://ldbmcs.gitbook.io/java/java-37/java-ji-chu/java-ji-chu-chou-xiang-lei.md)