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This is often called a 'local' install because you're not installing Java to a 'global' location.

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If you download a TAR file from either or Azul, you must install it manually.

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You can find downloads of OpenJDK at in the form of a tarball requiring manual installation, or you can download the Zulu Community edition from Azul in the form of a tarball or installable RPM or DEB packages. If you can't find a JRE or JDK in your repository, or the ones you find don't fit your needs, you can download open source Java packages from the internet. Search on OpenJDK and look for either the most recent JRE or JVM if you're a user and for the most recent JDK if you're a developer. There are probably many many Java-related packages in your repository. In this case, the default-jre package is appropriate for users, and the default-jdk is suitable for developers.ДЇor example, to installВ the JRE on Debian: $ sudo apt install default-jre On Linux, you can have several different versions of Java installed all at once, and they won't interfere with one another. When an application tells you that you need Java 12, but your repository only has Java 8, it's fine to install whatever implementation of Java 12 you can find from a reliable source. If you feel overwhelmed by the choices, then the easy answer of which Java implementation you should install is whichever is easiest for you to install.

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The IcedTea project is essentially OpenJDK, but its goal is to make it easier for users to build and deploy OpenJDK when using fully free and open source tools. Oracle bundles proprietary components with its Java downloads, while the OpenJDK project is fully open source. Luckily, Java is an open source technology, so if you're not happy with the way Oracle maintains the project, you have other options. When Sun Microsystems was bought by Oracle, Java was a major part of the sale. What's the difference between OpenJDK, IcedTea, and OracleJDK?

If you're a developer looking to program in Java, you need the JDK (which includes JRE libraries, which in turn includes a JVM).

If you're a user looking to run a Java application, you only need the JRE (which includes a JVM).

In terms of downloads, this translates to: The JDK includes the Java Runtime Environment (JRE). The Java Development Kit (JDK) is a development toolkit: you can think of it as a garage where tinkerers sit around making adjustments, repairs, and improvements. It's included in the Java Runtime Environment (JRE). The Java Virtual Machine (JVM) is a runtime component it's the 'engine' that enables Java applications to launch and run on your computer. Java is broadly split into two downloadable categories. That means, before you can install anything, you have to decide which Java you want to install. Java is an open source language and specification, meaning that anyone can, in theory, create an implementation of it. The bad news is that Java is big, not so much in size as in scope.

The good news is that you have many options, and this article covers them all. Because Java is such a popular backend for so many applications, it's good to understand the different ways you can install it.

Sometimes you might find an application in an app store, or you might install it with a package manager like DNFВ on Fedora or Brew on Mac, and other times, you might download an executable or an installer from a website. No matter what operating system you're running, there are usually several ways to install an application. More useful commands and usages can be found at SDKMAN Usage.

Note that removing a local version will not remove the local installation. Do you want java 8u111 to be set as default? (Y/n):ДЄnswering yes (or hitting enter) will ensure that all subsequent shells opened will have this version of the SDK in use by default. Now you will be prompted if you want this version to be set as default. You will see something like the following output: Downloading: java 8u111 Install the latest stable version of your SDK of choice (say, Java JDK) by running the following command: sdk install java If all went well, the version should be displayed.

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Lastly, run the following code snippet to ensure that installation succeeded: sdk version Next, open a new terminal or enter: source ' $HOME/.sdkman/bin/sdkman-init.sh' Open a new terminal and enter: curl -s '' | bashДЇollow the instructions on-screen to complete installation. It provides a convenient command line interface (CLI) and API for installing, switching, removing and listing candidates.

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SDKMAN! is a tool for managing parallel versions of multiple software development kits on most Unix-based systems.