linux安装jdk

jdk1.8-1.8.0_221-fcs.x86_64.tar.gz

/opt/jdk

[root@xxx jdk]# tar -zxvf jdk-8u281-linux-x64.tar.gz

[root@xxx jdk]# vim /etc/profile

# java
export JAVA_HOME=/opt/jdk/jdk1.8.0_281
export PATH=$JAVA_HOME/bin:$PATH
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib

刷新

source /etc/profile

java -version