下载
jdk-8u251-linux-x64.tar.gz
解压
tar -zxvf jdk-8u251-linux-x64.tar.gz
复制
cp -r jdk1.8.0_251 /usr/local/
配置环境变量
vim /etc/profile
#java environment
export JAVA_HOME=/usr/local/jdk1.8.0_251
export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=$PATH:${JAVA_HOME}/bin
source /etc/profile
