--> yum search java | grep openjdk
--> yum install java-1.8.0-openjdk-headless.x86_64
--> yum install java-1.8.0-openjdk-devel.x86_64
--> update-alternatives --config java #pick java 1.8 and press 1
--> update-alternatives --config javac #pick java 1.8 and press 2
No compiler is provided in this environment. Perhaps you are running on a JRE rather than a JDK?
原文：https://www.cnblogs.com/zheh/p/12894930.html