![]() ![]() To uninstall the Java package, open terminal (Ctrl+Alt+T) and run command: sudo apt remove -autoremove jdk-21įor the ARM version, simply remove all the installed files, by running the commands below one by one: ![]() To verify JAVA HOME, run the command below in terminal at next login: java -XshowSettings:properties -version Uninstall Java JDK 21 sudo chmod +x /etc/profile.d/jdk.csh /etc/profile.d/jdk.sh Setenv PATH $:/usr/lib/jvm/jdk-21/bin:/usr/lib/jvm/jdk-21/db/binįinally, change the permissions via command, and it should take place next time you log in. Option 2.) To make it permanent, create and edit config file via command: sudo gedit /etc/profile.d/jdk.shĭepends on your desktop environment, you may replace gedit with mousepad for XFCE, xed for Linux Mint, pluma for MATE, kate for KDE Plasma, gnome-text-editor for Ubuntu 23.04+.Įxport PATH=$PATH:/usr/lib/jvm/jdk-21/bin:/usr/lib/jvm/jdk-21/db/binĪnd create anther one for C shell: sudo gedit /etc/profile.d/jdk.csh Option 1.) Set JAVA_HOME for current command console, that will work until you close it: export JAVA_HOME=/usr/lib/jvm/jdk-21 setenv JAVA_HOME=/usr/lib/jvm/jdk-21 deb version, just verify JAVA HOME via the bottom command. When done, verify by running command in terminal: java -version javac -versionĪs well, you only need to do this for ARM package. sudo update-alternatives -config java sudo update-alternatives -config javac sudo update-alternatives -config jar Similarly, add links for other executable files (e.g., jarsigner, jlink, javadoc) as you need.ī.) Next, run the commands below one by one, and type number to select Java JDK 20 as default. To set it as default, do the following 2 steps one by one.Ī.) Create symbolic links for the executable files: sudo update-alternatives -install /usr/bin/java java /usr/lib/jvm/jdk-21/bin/java 1 sudo update-alternatives -install /usr/bin/javac javac /usr/lib/jvm/jdk-21/bin/javac 1 sudo update-alternatives -install /usr/bin/jar jar /usr/lib/jvm/jdk-21/bin/jar 1 It installs the files into ‘ /usr/lib/jvm/jdk-21/‘ directory. ![]() deb package now automatically set Java 21 as default! So, you ONLY need to follow the steps below for the ARM package. Then, extract the tarball to that directory via: sudo tar -zxf ~/Downloads/jdk-21_linux-aarch64_ -C /usr/lib/jvm/ 3. deb in file manager to install it via Ubuntu Software App.įor the ARM package (for Raspberry Pi, Apple M1/2, etc), run command to create ‘/usr/lib/jvm’ directory in case it does not exist: sudo mkdir -p /usr/lib/jvm Once you downloaded the package, open terminal (Ctrl+Alt+T) and run the command below to install the deb package: sudo apt install ~/Downloads/jdk-21_linux-圆4_bin.deb deb package for modern PC and laptops, or tarball for ARM cpu architecture. And in this tutorial, we will learn how to do that.It’s the 64-bit. However, those who want to install the official Oracle Java 8 version on their Linux systems they can do that as well. That’s is the reason why the Java version available in them to install by default using the package manager is OpenJDK- the open-source implementation of Java by its community. Well, as Linux systems are open source, hence the packages available to install via their official repositories are mainly free and open source. ![]() For example, apps for Google’s Android operating system are developed in Java. Java is primarily used to program web applications, desktop applications, and apps. Java was mainly influenced by the programming languages C++, C#, and Objective-C. It belongs to the group of object-oriented programming languages which means written programs are structured in classes and objects. The first version of Java appeared in 1995 and, along with C, is one of the most famous programming languages in the world. For example, you can program your own pocket calculator with a few lines of text code.Īnd Java is a popular programming language owned by the company “Sun Microsystems” but later bought by Oracle in 2010. Learn the commands to download & install Oracle Jave 8 64-bit on Ubuntu 20.04 Focal fossa or Ubuntu 22.04 Jammy Jellyfish using the terminal.Ī programming language, in general, allows you to formulate programs and specify their behavior. ![]()
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