1. Create a folder java in the /usr directory, mkdir java
2. cd java , execute the command wget --no-check-certificate --no-cookies --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/ If jdk/8u111-b14/jdk-8u111-linux-x64.tar.gz does not have permission, add sudo.
3. Unzip the downloaded jdk-8u111-linux-x64.tar.gz file, tar -xzvf jdk-8u111-linux-x64.tar.gz , if you do not have permission, add sudo. After completion, there will be a folder in the java directory
jdk1.8.0_111
4. Configure the jdk environment variables. Enter the /etc directory, vi edit the profile file, add the following configuration at the end of the file and save:
JAVA_HOME=/usr/java/jdk1.8.0_111
CLASSPATH=$JAVA_HOME/lib/
PATH=$PATH:$JAVA_HOME/bin
export PATH JAVA_HOME CLASSPATH
5. Execute the java and java -version commands to see if the installation is successful