# 入门

- [ubuntu安装](/java/ru-men/an-zhuang.md)
- [window配置环境变量](/java/ru-men/pei-zhi-huan-jing-bian-liang.md)
- [编写HelloWorld](/java/ru-men/bian-xie-helloworld.md)
- [注释](/java/ru-men/zhu-shi.md)
- [编程风格](/java/ru-men/bian-cheng-feng-ge.md)
- [进制与字符编码](/java/ru-men/jin-zhi-yu-zi-fu-bian-ma.md)
- [键盘录入](/java/ru-men/jian-pan-lu-ru.md)
