In our case: sudo update-java-alternatives -set java-8-oracle update symlinks under /etc/alternatives to point to java-8-oracle executables. Try to update the jdk as indicated above (switch between java 7 and java 8) and view how change the output of this command: To allows the system to choose the user favourites tool given a specific task a mechanism using symlinks under /etc/alternatives/ is used. Update-java-alternatives (a specific java version of update-alternatives): in Ubuntu several packages provides the same functionality (browse the internet, compile mails, edit a text file or provides java/javac executables.). Sudo apt-get install oracle-java8-installer With sudo apt-get update we actually update the system repository (all this operations requires superuser privileges, so we prepend sudo to the commands). In our case: with the command sudo add-apt-repository ppa:webupd8team/java we inform the system that the next repository update must retrieve packages information also from webupd8 repo. In Ubuntu is possible to extend the main repository using a PPA (Personal Package Archive) that usually contains packages not available in the system (just like oracle jdk) or updated versions of available ones (example: LibreOffice 5 in LTS is available only through this PPA).Īpt-get : it's "the" command-line package handler used to manipulate the state of every repository on the system (installing / updating / upgrading can be viewed as an alteration of the repository current state). Sudo : execute a command with the superuser privilege.Īdd-apt-repository : Ubuntu (just like every Debian derivatives and generally speaking every Linux distribution) has a main repository of packages that handle things like package dependencies and updating. Install the chosen version with: sdk install java įor example: sdk install java 9.0.1-oracle View available versions with: sdk ls java NOTE: sdkman allow to install also the official Oracle JDK, although it's not a the default option. Source "$HOME/.sdkman/bin/sdkman-init.sh" If you haven't administrator rights on your target machine your simplest bet is to use sdkman to install the zulu certified openjdk: curl -s "" | bash If you're using an older version Ubuntu: sudo apt-get install python-software-properties If you get add-apt-repository: command not found be sure to have software-properties-common installed: sudo apt-get install software-properties-common Sudo update-java-alternatives -set java-8-oracle Sudo update-java-alternatives -set java-7-oracle ![]() Then you can use the command update-java-alternatives to switch between installed version: # list available jdk You can also install multiple version of jdk, mixing openjdk and oracle versions. Install your preferred version of jdk (versions from java-6 to java-9 available): sudo apt-get install oracle-java8-installer Further, use Oracle JDK for development, just to avoid (very sporadic) compatibility issues (i've tried many years ago, it's surely better now).Īdd the webupd8 repo to your system: sudo add-apt-repository ppa:webupd8team/java I advise you to not install packages manually on ubuntu system if there is already a (semi-official) repository able to solve your problem. UPDATE: installation without root privileges below Any other advice for this new issue would be appreciated, otherwise I will definitely be checking out that link first thing in the morning. I saw that there's a link below, I intend to check it out in the morning, it's 2am and I'm tired right now. Now I have JDK 7, and Eclipse, and Maven, and they're all working, but I'm stuck on JDK 7 rather than 8. I installed OpenJDK 7, it came with Maven and just installed before I realized I was getting a two-for-one deal. In the meantime, I'm just gonna use the Oracle package. sudo apt-get install openjdk-8-jdkĮ: Unable to locate package openjdk-8-jdkĪny help would be appreciated. ![]() ![]() Again, very new to Linux, been on my first Linux distro ever for less than an hour here at this point. I'm pasting the terminal command and the error message I get here, hoping for advice. What is the difference between the Oracle version and OpenJDK. So I just installed Ubuntu, and this is my first time working in a Linux environment, so bear with my noobishness here.Īnyway, I downloaded the Java 8 JDK directly from Oracle, but I understand there's also an OpenJDK for Java 8 as well.
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