$ yum search openjdk

java-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundle

java-1.8.0-openjdk.i686 : OpenJDK Runtime Environment 8

java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment 8

java-1.8.0-openjdk-accessibility.i686 : OpenJDK accessibility connector

java-1.8.0-openjdk-accessibility.x86_64 : OpenJDK accessibility connector

$ yum -y install java-1.8.0-openjdk

$

$

$

$ useradd -s /sbin/nologin tomcat

$ curl -O http://ftp.nsa.jp/net/apache/tomcat/tomcat-9/v9.0.0.M21/bin/apache-tomcat-9.0.0.M21.tar.gz

$ tar -xzvf ~/apache-tomcat-9.0.0.M21.tar.gz

$ mv ~/apache-tomcat-9.0.0.M21 /opt

$ chown -R tomcat:tomcat /opt/apache-tomcat-9.0.0.M21

$ vi /etc/systemd/system/tomcat.service

$ chmod 755 /etc/systemd/system/tomcat.service

$ systemctl enable tomcat

Created symlink from /etc/systemd/system/multi-user.target.wants/tomcat.service to /etc/systemd/system/tomcat.service.

$ systemctl start tomcat

$ chmod 755 /etc/systemd/system/tomcat.service