1 下载jdk1.8
jdk-8u181-linux-x64.tar.gz下载地址
2 解压文件
tar -xzvf jdk-8u181-linux-x64.tar.gz
3 修改环境变量
export JAVA_HOME=/usr/java/jdk1.8.0_181 export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar export PATH=$JAVA_HOME/jre/bin:$PATH
4 配置生效
source /etc/profile
5 查看java版本
[root@localhost Desktop]# java -version java version "1.8.0_181" Java(TM) SE Runtime Environment (build 1.8.0_181-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode) [root@localhost Desktop]#