By reading this article, you will learn the following: Here I will show how to manage multiple Java version on your UNIX based machine using SDKMAN. It allows us to install, remove, switch and list candidate versions of different SDKs including Java (e.g., JDK, Ant, Dotty, Gradle, Scala, and many more). SDKMAN is a Software Development Kit Manager for managing parallel versions of multiple Software Development Kits on most Unix based systems. The other elegant and convenient way is to use the SDKMAN.
In that case, you have to modify a few environment variables when you need to switch your Java version. One way to achieve this is to install multiple Java versions and configure different Java versions manually. Or maybe you are working on two different projects where two different versions of Java are used. You may use Java8 or Java11 in your project, but want to learn newer versions of Java. I checked that this installation method able to used with CentOS 7.If you are a Java developer, you may need to install multiple Java versions on your machine. $ yum -disablerepo=\* -enablerepo=offline-openjdk install -nogpgcheck java-1.8.0-openjdk-devel.x86_64 vi /etc//offline-openjdk.repoįinally, you can use this command to finish the installation. You must move the /openjdk directory to CentOS 7 system of target.(Use DVD, CD, USB, etc.)Īlmost finally, you should make a repo as below to install openjdk. Now, You can delete the /openjdk-installroot directory.
$ yum install -downloadonly -installroot=/openjdk-installroot -releasever=7 -downloaddir=/openjdk java-1.8.0-openjdk-devel.x86_64
Then create repo database through creatrepo. $ mkdir /openjdkĭownload many rpms to the /openjdk-installroot directory using -downloadonly(yum-plugin-downloadonly). openjdk-installroot directory is a folder for temporarily storing many rpms. Then create the directory for installation. $ yum install yum-plugin-downloadonly yum-utils createrepo
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