Oracle Java JDK7 x64 How to Install and Getting-Started on Linux Kubuntu 12.10 Quantal amd64 Easy Visual-Guide

April 1, 2013 | By Regaz | Filed in: Uncategorized.

The Tutorial Shows You Step-by-Step How to Install Oracle-Sun Java JDK 7 x64 for Linux Kubuntu 12.10 Quantal Quetzal 64-bit KDE4 Desktop.

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

To the Article Bottom there is a Link for Quick Start with Java JDK 7 Development and also How to Install the Java Web-Servers Tomcat7 for Linux Kubuntu.

And this Visual Guide includes the Basic Screenshots of All GUI Steps involved.

The Content give Focus Only to the Essentials Instructions and Commands to make it Easier to Follow.

Java On Ubuntu
  1. Download Latest Oracle Java SE JDK 7:

    Oracle JDK x64 tar.gz
  2. Double-Click on the Archive and Extract into /tmpKDE Extract Java JDK 7 tar.gz
  3. Open Terminal Window
    (Press “Enter” to Execute Commands)
    Linux Kubuntu 12 Open Terminal
  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 contents 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

    And for the Java Compiler instead:

    sudo update-alternatives --config javac

    To Switch of Java Version Just Enter the Reference 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

  8. How to Install Apache Tomcat 7 Server on Linux Kubuntu

    Install Tomcat7 for Kubuntu

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