![]() To change the default Java version, just enter the number when prompted and hit Enter. The output should look similar to the following: There are 2 programs which provide 'java'.ġ java-11-openjdk.x86_64 (/usr/lib/jvm/java-11-openjdk-11.0.3.7-0.el7_6.x86_64/bin/java) If you have multiple Java versions installed on the server, you can change the default version using the alternatives system utility: sudo alternatives -config java OpenJDK 64-Bit Server VM 18.9 (build 11.0.3+7-LTS, mixed mode, sharing) OpenJDK Runtime Environment 18.9 (build 11.0.3+7-LTS) You can check the default Java, with: java -version openjdk version "11.0.3" LTS Once you download the package, use the following command to install it: sudo yum localinstall jre-VERSION-linux-圆4.rpm Set the default version # To download Oracle Java, you need to register on the Oracle site. The license permits only non-commercial use of the software, such as personal use and development use. Oracle packages are available to download only from their official websiteīefore installing Oracle Java, make sure you read the Oracle JDK License In this section, we will go through the steps of installing Oracle Java. ![]() Same as above if your application requires OpenJDK 7 JRE you can install it with yum by running the following command: sudo yum install java-1.8.0-openjdk Install Oracle Java # If your application requires the older Java 8 to be installed on your CentOS 7 system, install it by running the following command: sudo yum install java-1.8.0-openjdk-devel Install OpenJDK 8 JRE # Java 8 is still the most widely-used version of Java. JRE is a subset JDK, and if you already installed the JDK package, you do not need to install this one. ![]() The installation is simple and straightforward. OpenJDK, the open-source implementation of the Java Platform, is the default Java development and runtime in CentOS 7. Prerequisites #īefore starting with the tutorial, make sure you are logged in as root or user with sudo privileges If you are not sure which Java implementation and version to install, the general recommendation is to install OpenJDK 11 JDK, which is the current LTS version of Java. There are also 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. If you are a Java developer, then you will need JDK, which includes JRE and development/debugging tools and libraries. If you only want to run Java programs, then you can install JRE, which contains just the Java Runtime Environment. There are two different Java packages in CentOS 7, Java Runtime Environment (JRE), and the Java Development Kit (JDK). This tutorial covers the Java SE (Standard Edition) edition. Java is distributed in three different editions, Standard Edition (SE), Enterprise Edition (EE), and Micro Edition (ME). Prerequisites #īefore continuing with this tutorial, make sure you are logged in as a user with sudo privileges ![]() We’ll show you how to install OpenJDK as well as Oracle Java. ![]() This tutorial describes how to install various versions and implementations of Java on CentOS 7. Java is one of the most popular programming languages in the world, used to build different kinds of applications and systems. ![]()
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