linux-JDK安装与环境变量配置

https://jingyan.baidu.com/article/7908e85cc58008af481ad2a9.html
https://blog.csdn.net/lyhkmm/article/details/79524712

 

删除jdk

https://blog.csdn.net/u011628753/article/details/124527116

export JAVA_HOME=/usr/local/java/jdk1.8.0_211
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$JAVA_HOME/bin:$PATH