Java is a secure, stable, and well known, general-purpose programming language and computing technology platform with many interconnected capabilities.
To run Java-based applications, you must have Java installed on your server. You mostly need the Java Runtime Environment (JRE), a collection of software components used to run Java applications on the Linux machine.
If you want to develop software applications for Java, you need to install the Oracle Java Development Kit (JDK), which comes with a complete JRE package with tools for developing, debugging, and monitoring Java applications and it is an Oracle’s supported Java SE (Standard Edition) version.
Note: If you are looking for an open-source and free JDK version, install the OpenJDK which provides the same features and performance as Oracle JDK under the GPL license.
At the time of writing this article, OpenJDK 11 is the current LTS version of Java to be installed using the following command from the default repositories:
# yum install java-11-openjdk-devel # java -version
openjdk 11.0.8 2020-07-14 LTS OpenJDK Runtime Environment 18.9 (build 11.0.8+10-LTS) OpenJDK 64-Bit Server VM 18.9 (build 11.0.8+10-LTS, mixed mode, sharing)
In this article, we will show you how to install Oracle OpenJDK 14 in RHEL 8/7/6, CentOS 8/7/6, and Fedora 30-32 to develop and run Java applications.
Installing Oracle OpenJDK 14 in CentOS/RHEL and Fedora
# wget --no-check-certificate -c --header "Cookie: oraclelicense=accept-securebackup-cookie" https://download.oracle.com/otn-pub/java/jdk/14.0.2+12/205943a0976c4ed48cb16f1043c5c647/jdk-14.0.2_linux-x64_bin.rpm
Install the package using the following command:
# yum localinstall jdk-14.0.2_linux-x64_bin.rpm
If you have more than one Java version installed on the system, you need to set the default version using the alternatives command as shown.
# alternatives --config java
There are 2 programs which provide 'java'. Selection Command ----------------------------------------------- + 1 java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-184.108.40.206-0.el8_2.x86_64/bin/java) * 2 /usr/java/jdk-14.0.2/bin/java Enter to keep the current selection[+], or type selection number:
Just, enter the number to set the default Java version on the system.
Finally, check the Java version.
# java -version
java version "14.0.2" 2020-07-14 Java(TM) SE Runtime Environment (build 14.0.2+12-46) Java HotSpot(TM) 64-Bit Server VM (build 14.0.2+12-46, mixed mode, sharing)
Congratulations! You’ve successfully installed the latest version of Oracle OpenJDK 14 in RHEL 8/7/6, CentOS 8/7/6, and Fedora 30-32 to develop and run Java applications.