Oracle Java JDK7 x64 How-to install and Getting-Started on Linux Ubuntu 12.10 Amd64 Quantal Easy Visual-Guide

September 10th, 2012 by Regaz



The Guide Shows You in Easy-Steps How-to Install and Getting-Started with the Latest Oracle-Sun Official Java SE JDK x64 for Ubuntu Linux 12.10 Quantal Quetzal 64bit Unity Desktop.

After Installing you will need to Use the update-alternatives Tool to Update your System Java to 1.7 JDK.

To the Article Bottom there is a Link for Quick Getting-Started with Java JDK 7 Development and also to Install the Java Web-Server Tomcat 7 for Ubuntu Linux.

To Make the Entire Easy to Understand and Visualize the Post Includes the Basic Screenshots of the essentials steps involved.

The Content give Focus Only to the Essentials Instructions and Commands to make it Easier to Understand;)

Java-Balloon
  1. Download Oracle Java SE JDK:

    Oracle JDK x64.tar.gz
  2. Double-Click on the tar.gz Archive and Extract into /tmpJava JDK 7 tar.gz Extraction Path
  3. Open a Terminal Window
    (Press “Enter” to Execute Commands) Ubuntu Linux 12 Open Terminal Window
  4. Relocate JDK 7
    sudo su

    If Got “User is Not in Sudoers file” then Look: Solution

    if [ ! -d "/usr/lib/jvm" ]; then mkdir /usr/lib/jvm; fi

    The above command is used to create a jvm directory if not already there.

    chown -R root:root /tmp/jdk1.7*

    Reiterate the Execution Permission over the Java binaries

    chmod -R +x /tmp/jdk1.7*/bin

    Finally Shift the Java content with

    mv /tmp/jdk1.7* /usr/lib/jvm/
  5. Installing Oracle Java JDK 7
    update-alternatives --install \
    /usr/bin/java java /usr/lib/jvm/jdk1.7*/bin/java 1065
    update-alternatives --install \
    /usr/bin/javac javac /usr/lib/jvm/jdk1.7*/bin/javac 1065
    update-alternatives --install \
    /usr/bin/jar jar /usr/lib/jvm/jdk1.7*/bin/jar 1065
    update-alternatives --install \
    /usr/bin/javaws javaws /usr/lib/jvm/jdk1.7*/bin/javaws 1065

    Checking or Setting the System Java Version in Use with

    update-alternatives --config java

    To Switch of Java Version Just Enter the Selection Number on First Column. :)

  6. Optionally Set Java Environment Variable

    su <myUser>
    nano $HOME/.bashrc

    Append:

    export JAVA_HOME=/usr/lib/jvm/jdk1.<X.Y_uZ>

    Ctrl+x to Save & Exit from nano :)

    source $HOME/.bashrc
  7. How-to Install Oracle Java Browser Plug-In:

    Install Oracle Java Firefox PlugIn

Guides to Installing the Tomcat7 Server on Ubuntu Linux:

Install Tomcat7 for Ubuntu

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