sudo yum install java-1.8.0-openjdk
sudo yum install java-1.8.0-openjdk-devel
Using Environment Variables
Many Java applications use the JAVA_HOME or JRE_HOME environment variables to determine which java executable to use.
For example, if you installed Java to /usr/java/jdk1.8.0_161/jre/bin (i.e. java executable is located at /usr/java/jdk1.8.0_161/jre/bin/java), you could set your JAVA_HOME environment variable in a bash shell or script like so:
export JAVA_HOME=/usr/java/jdk1.8.0_161/jre
If you want JAVA_HOME to be set for every user on the system by default, add the previous line to the /etc/environment file. An easy way to append it to the file is to run this command:
sudo sh -c "echo export JAVA_HOME=/usr/java/jdk1.8.0_161/jre >> /etc/environment"