How to install Java on CentOS 7 | Linuxize
https://linuxize.com/post/install-java-on-centos-7/
CentOS 安装oracle JDK - Andes Home 千年的塔 -十年技术，风雨兼程 - CSDN博客
https://blog.csdn.net/hittata/article/details/8285653
How to install Oracle Java 8 on CentOS 7 / RHEL 7 - XGeneCode
http://xgenecode.com/wp/2018/01/04/install-oracle-java-8-centos-7-rhel-7/?i=1