Ubuntu – How to install Oracle JDK 6?

javajdk

Most of the software is not thoroughly tested with Java 7 and I would like to install Oracle's JDK 6.0 on Ubuntu 11.10.

Could someone please provide me the instructions for the same?

Best Answer

  • Due to license issues Ubuntu will no longer distribute Oracle's JDK and JRE. Also previous versions supplied on PPAs suffer from security issues are are not recommended to be installed on any Ubuntu system.

    There are no more supported java releases from Ubuntu - Ubuntu officially supports OpenJDK and OpenJRE implementation of Java which is the base for Oracle's own implementation.

    To install the OpenJDK & OpenJRE refer to this Q&A.

    The instructions below provide a guide to install the official Oracle JDK 6. You will need to regularly update this manually to ensure your installation maintains recommended security and stability fixes.

    Install the Oracle JDK 6

    Oracle JDK 6 is no longer maintained. It is not updated with the latest security patches and are not recommended for use in production.
    You can however still download them from the Oracle Java Archive

    Oracle themselves have the official guide to install their JDK - below is based upon those instructions.

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

    • Give it permissions to execute and extract it

      chmod a+x [version]-linux-i586.bin

      ./[version]-linux-i586.bin

    During installation it will ask you to register - press ENTER. Firefox will open with the registration page. Registration is optional.

    JDK 6 package is extracted into ./jdk1.6.0_x directory, for example ./jdk1.6.0_30.

    Lets rename it:

    mv jdk1.6.0_30 java-6-oracle
    
    • Now move the JDK 6 directory to /usr/lib

    sudo mkdir /usr/lib/jvm

    sudo mv java-6-oracle /usr/lib/jvm

    switch to Oracle JDK 6

    webupd8.googlecode.com hosts a nice-easy script to help with this.

    wget https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/webupd8/update-java-0.5b
    chmod +x update-java-0.5b
    sudo ./update-java-0.5b
    

    don't worry - 0.5b refers to the script version - not the version of java!

    An alternative to this is to use the webupd8 ppa and the update-java package.

    enter image description here

    Finally test the switch has been successful:

    java -version
    javac -version
    

    These should display the oracle version installed - 1.6.0_30

    Install the Firefox/Chrome plugin

    In a terminal:

    mkdir ~/.mozilla/plugins
    

    Remove the IcedTea plugin, if it has been installed.

    sudo apt-get remove icedtea6-plugin
    

    Remove a former version of the Java plugin (may or may not be present)

    rm ~/.mozilla/plugins/libnpjp2.so
    

    Now you can install the plugin, by creating a symbolic link (you tell Firefox, where the plugin is located).

    (32bit)

    ln -s /usr/lib/jvm/java-6-oracle/jre/lib/i386/libnpjp2.so ~/.mozilla/plugins/
    

    (64bit)

    ln -s /usr/lib/jvm/java-6-oracle/jre/lib/amd64/libnpjp2.so ~/.mozilla/plugins/
    

    Confirm that the JRE has been successful by using the official oracle website.


    Linked Questions:

    1. How do I install Java?
    2. How do I install Oracle Java JDK 7?
    3. How can I install Sun/Oracle's proprietary Java JDK 6/7/8 or JRE?