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InstallJava.md

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Installing Java

Oracle's Java SE is not included in the official Linux repositories due to license problems created by Oracle. However, it can still be installed on Linux.

  1. Download Sun/Oracle Java JDK from here (current version is JDK 8 Update 121) :

    and move the file to the /usr/lib/jvm directory.

    Note: Select the appropriate package for your architecture: x86 or x64.

  2. Extract the tarball (replace the * with the proper text):

    cd /usr/lib/jvm
sudo tar zxvf jdk-8u121-linux-*.tag.gz

    There will be a newly created folder on the same path with the extracted files

  3. Create a soft link to have a more generic name:

    sudo ln -s jdk1.8.0_121 java-8-oracle

  4. Add the new version of java, javac and javaws as an system alternative and give it priority 1

    sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/java-8-oracle/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/java-8-oracle/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/java-8-oracle/bin/javaws" 1

  5. Select the new alternatives to be used. To select the java alternative:

    sudo update-alternatives --config java

    To select the javac alternative:

    sudo update-alternatives --config javac

    To select the javaws alternative:

    sudo update-alternatives --config javaws

  6. Test your newly added java and javac. The java -version command should return:

    java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.121-b02, mixed mode)

    and the javac -version command should return:

    javac 1.8.0_121

  7. [Optional] Update system paths. Open /etc/profile with you favorite text editor, ie:

    sudo vi /etc/profile

    Navigate to the end of the file and add these contents:

    JAVA_HOME=/usr/lib/jvm/java-8-oracle
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME
export JAVA_BIN
export PATH

    Reload your system wide PATH /etc/profile with

    . /etc/profile