Ubuntu – How to install Sun/Oracle’s proprietary Java JDK 6/7/8 or JRE

javajdkjresoftware installation

I want to install Oracle's JRE and to update to the latest version with the Software Updater when they released. Is there a Ubuntu package that is provided by Canonical or Oracle?

Before release Java 7, I followed this way to install Java 6.

But it doesn't work for Java 7. There is no package sun-java7-xxx. How can you install Java 7?

Best Answer

  • There is a similar answer on how to install JRE 7.

    Install Java JDK

    The manual way

    • Download the 32-bit or 64-bit Linux "compressed binary file" - it has a ".tar.gz" file extension.

    • Uncompress it

      tar -xvf jdk-8-linux-i586.tar.gz (32-bit)

      tar -xvf jdk-8-linux-x64.tar.gz (64-bit)

      The JDK 8 package is extracted into ./jdk1.8.0 directory. N.B.: Check carefully this folder name since Oracle seem to change this occasionally with each update.

    • Now move the JDK 8 directory to /usr/lib

      sudo mkdir -p /usr/lib/jvm
      sudo mv ./jdk1.8.0 /usr/lib/jvm/
      
    • Now run

      sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.8.0/bin/java" 1
      sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.8.0/bin/javac" 1
      sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.8.0/bin/javaws" 1
      

      This will assign Oracle JDK a priority of 1, which means that installing other JDKs will replace it as the default. Be sure to use a higher priority if you want Oracle JDK to remain the default.

    • Correct the file ownership and the permissions of the executables:

      sudo chmod a+x /usr/bin/java
      sudo chmod a+x /usr/bin/javac
      sudo chmod a+x /usr/bin/javaws
      sudo chown -R root:root /usr/lib/jvm/jdk1.8.0
      

      N.B.: Remember - Java JDK has many more executables that you can similarly install as above. java, javac, javaws are probably the most frequently required. This answer lists the other executables available.

    • Run

      sudo update-alternatives --config java
      

      You will see output similar to the one below - choose the number of jdk1.8.0 - for example 3 in this list (unless you have have never installed Java installed in your computer in which case a sentence saying "There is nothing to configure" will appear):

      $ sudo update-alternatives --config java
      There are 3 choices for the alternative java (providing /usr/bin/java).
      
        Selection    Path                                            Priority   Status
      ------------------------------------------------------------
        0            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      auto mode
        1            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      manual mode
      * 2            /usr/lib/jvm/jdk1.7.0/bin/java                   1         manual mode
        3            /usr/lib/jvm/jdk1.8.0/bin/java                   1         manual mode
      
      Press enter to keep the current choice[*], or type selection number: 3
      update-alternatives: using /usr/lib/jvm/jdk1.8.0/bin/java to provide /usr/bin/java (java) in manual mode
      

      Repeat the above for:

      sudo update-alternatives --config javac
      sudo update-alternatives --config javaws
      

    Note for NetBeans users!

    You need to set the new JDK as default editing the configuration file.


    If you want to enable the Mozilla Firefox plugin:

    32 bit:
    ln -s /usr/lib/jvm/jdk1.8.0/jre/lib/i386/libnpjp2.so ~/.mozilla/plugins/
    
    64 bit:
    ln -s /usr/lib/jvm/jdk1.8.0/jre/lib/amd64/libnpjp2.so ~/.mozilla/plugins/
    

    N.B.: You can link the plugin (libnpjp2.so) to /usr/lib/firefox/plugins/ for a system-wide installation (/usr/lib/firefox-addons/plugins from 15.04 onwards). For Ubuntu 13.10, the path to the plugin directory is /usr/lib/firefox/browser/plugins/.

    Depending on your configuration, you might need to update the apparmor profile for Firefox (or other browsers) in /etc/apparmor.d/abstractions/ubuntu-browsers.d/java:

    # Replace the two lines:
    #  /usr/lib/jvm/java-*-sun-1.*/jre/bin/java{,_vm} cx -> browser_java,
    #  /usr/lib/jvm/java-*-sun-1.*/jre/lib/*/libnp*.so cx -> browser_java,
    # with those (or adapt to your new jdk folder name)
    /usr/lib/jvm/jdk*/jre/bin/java{,_vm} cx -> browser_java,
    /usr/lib/jvm/jdk*/jre/lib/*/libnp*.so cx -> browser_java,
    

    Then restart apparmor:

    sudo /etc/init.d/apparmor restart
    

    The easy way (Obsolete)

    Note: WebUpd8 team's PPA has been discontinued with effective from April 16, 2019. Thus this PPA doesn't have any Java files. More information can be found on PPA's page on Launchpad. Hence this method no longer works and exists because of hostorical reasons.

    The easiest way to install the JDK 7 is to do it with the Web Up8 Oracle Java OOS. However, it is believed that this PPA is sometimes out of date. Also note the dangers of using a PPA.

    This installs JDK 7 (which includes Java JDK, JRE and the Java browser plugin):

    sudo apt-get install python-software-properties
    sudo add-apt-repository ppa:webupd8team/java
    sudo apt-get update
    sudo apt-get install oracle-java7-installer
    # or if you want JDK 8:
    # sudo apt-get install oracle-java8-installer
    # these commands install Oracle JDK7/8 and set them as default VMs automatically:
    # sudo apt-get install oracle-java7-set-default
    # sudo apt-get install oracle-java8-set-default
    

    Source

    N.B.: Before someone screams this is against the Oracle redistribution license - the PPA does not actually have Java in the personal repository. Instead, the PPA directly downloads from Oracle and installs it.

    The Script way

    If you're on a fresh installation of Ubuntu with no previous Java installations, this script automates the process outlined above if you don't want to type all that into a console. Remember, you still need to download Java from Oracle's website -- Oracle's links are not wget friendly.

    Before using this make sure that this script is in the same directory as the .tar.gz file extension that you downloaded and there are no files that start with jdk-7 in the same folder. If there are, please move them out of the folder temporarily. Remember to make the script executable (chmod +x <script's file>).

    #!/bin/sh
    
    tar -xvf jdk-7*
    sudo mkdir /usr/lib/jvm
    sudo mv ./jdk1.7* /usr/lib/jvm/jdk1.7.0
    sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0/bin/java" 1
    sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0/bin/javac" 1
    sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/jdk1.7.0/bin/javaws" 1
    sudo chmod a+x /usr/bin/java
    sudo chmod a+x /usr/bin/javac
    sudo chmod a+x /usr/bin/javaws
    

    If you want to install the plugin for Firefox then add this to the end of the script:

    mkdir ~/.mozilla/plugins
    ln -s /usr/lib/jvm/jdk1.7.0/jre/lib/amd64/libnpjp2.so ~/.mozilla/plugins/
    sudo /etc/init.d/apparmor restart
    

    Check if installation was successful

    You can check if the installation succeeded with the following command:

    java -version
    

    You should see something like

    java version "1.8.0"
    Java(TM) SE Runtime Environment (build 1.8.0-b132)
    Java HotSpot(TM) 64-Bit Server VM (build 25.0-b70, mixed mode)
    

    You can check if the JRE Mozilla plugin has been successful by using the official oracle website.


    For Java 6: How do I install Oracle JDK 6?

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