First of all, check your current Java version with this command:

java -version

Example:

$ java -version
java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)

If your installed version is not Java 8 update 181, then you could follow the step in order to download the latest Java version and install it:

1. Download the Java JRE package for RPM-based distributions:

   curl -Lo jre-8-linux-x64.rpm --header "Cookie: oraclelicense=accept-securebackup-cookie" "https://download.oracle.com/otn-pub/java/jdk/8u181-b13/96a7b8442fe848ef90c96a2fad6ed6d1/jre-8u181-linux-x64.rpm"
   

2. Check that the package was successfully downloaded:

   rpm -qlp jre-8-linux-x64.rpm > /dev/null 2>&1 && echo "Java package downloaded successfully" || echo "Java package did not download successfully"
   

3. Install the package using yum:

   yum -y install jre-8-linux-x64.rpm
   rm -f jre-8-linux-x64.rpm