Note: the versions in italics are no longer supported. Let's take a look at the Java SE history: Oracle strongly recommends using the term JDK to refer to the Java SE (Standard Edition) Development Kit (there are also Enterprise Edition and Micro Edition platforms). It's thus named because it contains more tools than the standalone JRE, as well as the other components needed for developing Java applications. It contains a complete Java Runtime Environment, a so-called private runtime. You’ve installed and configured Java on AlmaLinux.JDK (Java Development Kit) is a software development environment used in Java platform programming. Example output: java is hashed (/usr/bin/java)Īnd finally, set the variable with the following command: export JAVA_HOME=/usr/bin/javaĪnd that’s it. Which should give you a result with the location of the Java installation. An easier one is just running the following command: type java There are multiple methods of finding where you’ve installed Java. To set the variable, you need to add the location of where you’ve installed Java to the JAVA_HOME variable. Some applications use the JAVA_HOME variable to find the location of your Java installation. You can verify if you changed the default version by running: java -version Step 4: Set the JAVA_HOME environment variable (optional) So, in this example, the current default version of Java that is used is Java 11, to change it to Java 17, just type “2” and hit Enter. An example output is: There are 2 programs which provide 'java'. This will list out all the installed Javas on your system, and you’ll need to enter a number to choose what version you’d like to use. If you’ve installed multiple Java versions, you can change the default version you’re using by running the following command: alternatives -config java Step 3: Change the default Java version (optional) You don’t have to do the next 2 steps, they are optional. Java is now installed and you can continue using it on your AlmaLinux. OpenJDK 64-Bit Server VM 21.9 (build 17.0.1+12-LTS, mixed mode, sharing)Īnd that’s it. OpenJDK Runtime Environment 21.9 (build 17.0.1+12-LTS) This should give you an output similar to this: openjdk version "17.0.1" LTS To verify that you installed Java 17, run the following command: java -version We’ll show you how to switch between versions below. You can also install multiple versions of Java. If you want to install JRE (not JDK), just remove “-devel” from the command. To install it, run the following command: yum install java-17-openjdk-devel Run the following command: yum update Step 2: Install Java 17 (latest LTS version)Īs of writing, the latest LTS release of Java is version 17. Or if you need a managed server and you want the hosting provider to install Java for you, then get one from SolaDrive.Īs always, the first step is to update your system. Root access (log in as the root user before doing the first step). These instructions were written and tested for AlmaLinux, but they should work on CentOS and Fedora too, any versions. If you don’t know the differences between any of these, you can either google them or don’t worry about it – this tutorial will set up the environment that will most likely work for you. Most people prefer OpenJDK, so that’s what we’ll use. There are also two different implementations – OpenJDK (FOSS), and Oracle Java. The JDK also includes JRE, so this tutorial will show you how to install JDK on Alma Linux. Java also has different packages to choose from, Java Runtime Environment (JRE) and the Java Development Kit (JDK). Java has different editions to choose from, so we’ll include instructions for the most popular and widely used one – the Standard Edition. In this tutorial, we’ll show you how to install and configure Java on AlmaLinux via the CLI. It’s a great server distro and a lot of people switched to Alma after the whole CentOS Stream announcement. AlmaLinux is a FOSS alternative to the old CentOS.
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