Install Oracle Java JDK 7 in Ubuntu 12.04 (Precise Pangolin)

Last week we showed you how to install Oracle Java Runtime Environment (JRE) in Ubuntu 12.04. To read that post, click here.

In today’s post, I’m going to show you how to install Oracle Java (JDK) 7 in Ubuntu as well. There are some blogs that will show you how to install it via PPA, which is much easier, but then most PPA sources are not reliable. One day they’re up and the next they’re gone. This method is the surefire way to install Java JDK in Ubuntu.


  • Install Java JDK in Ubuntu 12.04 (Precise Pangolin)
  • Enjoy!

To get started, download Java JDK package from here.

When prompted with the screen below, choose to save the file.




After saving, extract the downloaded package by running the commands below. This assumes that the package was downloaded in your Downloads folder.

tar -xvf ~/Downloads/jdk-7u3-linux-i586.tar.gz




Next, create a folder for Java JDK files and folders by running the commands below.

sudo mkdir -p /usr/lib/jvm/jdk1.7.0 




Then move all the JDK files and folders to the new location by running the commands below.

sudo mv jdk1.7.0_03/* /usr/lib/jvm/jdk1.7.0/




Next, copy and paste each command as shown below one-at-a-time to enable Java JDK. Remember to press Enter after each line.

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


Then create a Mozilla plugins folder in your home directory.

mkdir ~/.mozilla/plugins/




Finally, create a symbolic link to your Mozilla plugins folder. For 64-bit systems, replace ‘i386’ with ‘amd64’.

ln -s /usr/lib/jvm/jdk1.7.0/jre/lib/i386/ ~/.mozilla/plugins/




That’s it! Enjoy!


14 thoughts on “Install Oracle Java JDK 7 in Ubuntu 12.04 (Precise Pangolin)”

  1. Maybe you should also write how to set JAVA_HOME variable.

    1; # vim /etc/profile.d/
    2; contains:

    export JAVA_HOME=/usr/lib/jvm/jdk1.7.0
    export PATH=$PATH:$JAVA_HOME/bin
    3; # source /etc/profile
    4; DONE !

  2. Great instructions. In order to replace the default open JDK (which ships with ubuntu) with oracle/Sun JDK the following additional steps have to be performed

    sudo update-alternatives –config java
    sudo update-alternatives –config javac
    sudo update-alternatives –config javaws
    each of the above 3 commands will show you a list of all java versions been installed on your ubuntu system,please select the number which contains the path you just created in step 2

  3. I got this error after typing:
    sudo update-alternatives –install “/usr/bin/java” “java” “/usr/lib/jvm/jdk1.7.0/bin/java” 1

    The error reads:
    update-alternatives: error: alternative link is not absolute as it should be: usr/bin/java

    Any idea?


  4. It’s one of the best tutorials I have ever come across. Thanks a ton to the author. It worked for me for the first time itself. Your effort is measureless. Thanks again.

  5. sudo update-alternatives –install “/usr/bin/javaws” “javaws” “/usr/lib/jvm/jdk1.7.0/bin/javaws” 1

    After implement this one error is occured

    update-alternatives: error: alternative path /usr/lib/jvm/jdk1.7.0/bin/javaws doesn’t exist

    Now How to solve this error

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