1, the official website to download the jdk rpm file ( http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html )
2, to execute the command file directory
rpm -ivh jdk-8u221-linux-x64.rpm
3, the default installation directory under /usr/java/jdk1.8.0_221-amd64
4, configure the environment variables:
cd /etc/profile
End of the text add the following configuration:
JAVA_HOME=/usr/java/jdk1.8.0_221-amd64
CLASSPATH=%JAVA_HOME%/lib:%JAVA_HOME%/jre/lib
PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin
export PATH CLASSPATH JAVA_HOME
5, reload profile
source /etc/profile
6, checks for success
java -version