作者回复: 改成这个了
https://github.com/deepnighttwo/LetsJava/tree/master/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%20Java%E7%BC%96%E7%A8%8B%E5%9F%BA%E7%A1%80/%E9%99%84%E5%8A%A0%E9%A2%98-%E5%8F%8C%E4%BA%BA%E5%AF%B9%E6%88%98%E4%BA%94%E5%AD%90%E6%A3%8B/code
作者回复: 谢谢揪出 bug 一只~
https://github.com/geektime-geekbang/LetsJava/blob/master/%E7%AC%AC%E4%B8%80%E7%AB%A0%20%20Java%E7%BC%96%E7%A8%8B%E5%9F%BA%E7%A1%80/022-%E7%94%A8%E6%95%B0%E7%BB%84%E7%81%B5%E6%B4%BB%E5%A4%84%E7%90%86%E6%88%90%E7%BB%A9/code022/src/ScoreMaster.java#L118-L119