This article will help you to install Oracle Java 11 on RHEL 8 / CentOS 8. Java 11 is a long-term support (LTS) release which was made available to the General public on 25 September 2018 and is production-ready.
For Java 8 installation, use how to install Java 8 on RHEL / CentOS 8.
There are two ways of installing Java 11 on RHEL 8.
- Install Java SE Development Kit 11 (JDK 11)
- Install OpenJDK 11
It is recommended to install OpenJDK 11 because of the license issues around Java SE Development Kit. This guide will cover the installation of both.
For Ubuntu 18.04/16.04 & Debian 9, use: How to Install Java 11 on Ubuntu
For CentOS 7: How to Install Java 11 on CentOS 7 / Fedora
Install OpenJDK 11 on RHEL 8 / CentOS 8
OpenJDK is a free and open-source implementation of the Java Platform, Standard Edition licensed under the GNU General Public License version 2.
sudo yum install java-11-openjdk-devel
$ java -version openjdk 11-ea 2018-09-25 OpenJDK Runtime Environment (build 11-ea+28) OpenJDK 64-Bit Server VM (build 11-ea+28, mixed mode, sharing) $ which java /usr/bin/java
set Java environment variables
cat > /etc/profile.d/java11.sh <<EOF export JAVA_HOME=\$(dirname \$(dirname \$(readlink \$(readlink \$(which javac))))) export PATH=\$PATH:\$JAVA_HOME/bin export CLASSPATH=.:\$JAVA_HOME/jre/lib:\$JAVA_HOME/lib:\$JAVA_HOME/lib/tools.jar EOF
Source the file to start using it without logging out.
source /etc/profile.d/java11.sh
Install Java SE Development Kit 11 (JDK 11) on RHEL 8 / CentOS 8
Download the latest release of JDK 11.
curl -LO -H "Cookie: oraclelicense=accept-securebackup-cookie" \ "http://download.oracle.com/otn-pub/java/jdk/11.0.1+13/90cf5d8f270a4347a95050320eef3fb7/jdk-11.0.1_linux-x64_bin.rpm"
Then install the package with the rpmcommand
$ sudo rpm -Uvh jdk-11.0.1_linux-x64_bin.rpm warning: jdk-11.0.1_linux-x64_bin.rpm: Header V3 RSA/SHA256 Signature, key ID ec551f03: NOKEY Preparing... ################################# [100%] Updating / installing... 1:jdk-11.0.1-2000:11.0.1-ga ################################# [100%]
Confirm Java version installed
$ java -version java version "11.0.1" 2018-10-16 LTS Java(TM) SE Runtime Environment 18.9 (build 11.0.1+13-LTS) Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.1+13-LTS, mixed mode)
Test Java installation on CentOS 8 / RHEL 8
Write a Hello World Java code to test.
cat > hello_world.java <<EOF
public class helloworld {
public static void main(String[] args) {
System.out.println("Hello Java World!");
}
}
EOF
Run the code.
$ java hello_world.java Hello Java World!
Selecting Java Versions with Alternatives
If you have other versions of JDK installed, you set your default Java as follows.
$ sudo alternatives --list $ sudo alternatives --config java
Select Java version to use as default.
This will switch the system java binary to selected Java. Also do the same for javac since java and javac are independently managed.
$ sudo alternatives --config javac
More learning content:
Udemy.com
You now have Java 11 installed on your RHEL 8 server. Enjoy coding in Java.
