Setting the JAVA_HOME Environment Variable # Javac is a command utility for compiling Java programs. You may also want to change the default javac version: sudo alternatives -config java Enter the number of the version you want to use as the default and press Enter. *+ 2 java-1.8.0-openjdk.x86_64 (/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.8_0.x86_64/jre/bin/java)Įnter to keep the current selection, or type selection number:Ī list of all installed Java versions will be printed on the screen. The output will look something like below: There are 2 programs which provide 'java'.ġ java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.4.11-0.el8_0.x86_64/bin/java)
If you want to change the default version, use the alternatives command: To check what Java version is set as the default one, type: java -version If you installed multiple Java versions on your CentOS system, you can use the alternatives system to set which Java version will be used when you type java in the terminal.
#INSTALL OPENJDK 11 REDHAT INSTALL#
OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)įor minimal Java runtime, install the java-1.8.0-openjdk-headless package. OpenJDK Runtime Environment (build 1.8.0_222-b10) The output should look something like this: openjdk version "1.8.0_222" Verify the installation by checking the Java version: java -version If your application requires Java 8, you can install it by typing the following command: sudo dnf install java-1.8.0-openjdk-devel Java 8, the previous Java LTS version, is still supported and widely used. If you already installed java-11-openjdk-devel, the headless package will be installed as a dependency. To install only the headless OpenJDK 11 type: sudo dnf install java-11-openjdk-headless This version is more suitable for server applications since it has fewer dependencies and uses fewer system resources. That’s it! You have successfully installed Java on your CentOS 8 system.ĬentOS 8 also supports a headless version of OpenJDK that provides a minimal Java runtime needed for executing applications without a graphical user interface (no keyboard, mouse, and display systems support). OpenJDK 64-Bit Server VM 18.9 (build 11.0.4+11-LTS, mixed mode, sharing) OpenJDK Runtime Environment 18.9 (build 11.0.4+11-LTS) The output should look something like this: openjdk version "11.0.4" LTS
Once the installation is complete, you can verify it by checking the Java version: java -version To install the OpenJDK 11 on CentOS 8, run the following command as root or user with sudo privileges Some Java-based applications may require a specific version of Java, so you might need to consult the application documentation. The general recommendation is to install the latest Java LTS version (JDK 11) version.
#INSTALL OPENJDK 11 REDHAT HOW TO#
In this tutorial, we will explain how to install one or more Java (OpenJDK) versions on CentOS 8 and how to set the default Java via alternatives. The default CentOS 8 repositories include the latest two major Java LTS versions, Java 8 and Java 11.
OpenJDK is an open-source implementation of the Java Platform. Permits only non-commercial use of the software, such as personal use and development use. There are two different implementations of Java, OpenJDK and Oracle Java, with almost no differences between them, except that Oracle Java has a few additional commercial features. Java is one of the most popular programming languages used to build different types of applications and systems.
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