https://linuxize.com/post/install-java-on-ubuntu-18-04/
https://www.xiaomiqiu.com/article/77
https://linux265.com/news/3465.html https://www.cnblogs.com/FengZeng666/p/11992420.html
Ubuntu-java环境搭建
原文：https://www.cnblogs.com/tomtellyou/p/12203464.html
