How to Install Oracle JDK 7 on Kubuntu 14.04 Trusty LTS 32-64bit Easy Visual-Guide

November 8, 2014 | By the+gnu+linux+evangelist.

Oracle Java JDK 7 Quick Start Kubuntu 14.04 Trusty 32/64-bit

The Guide shows you in Easy-Steps How to Install and Getting-Started with the Oracle-Sun Official Java Development Kit 7 SE i586/x8664 for Kubuntu 14.04 Trusty Tahr LTS i386/amd64 Desktop Linux.

To SetUp Oracle JDK you will need to Use the update-alternatives Tool to Update your System Java to 1.7 JDK.

To the How to Download and Install Oracle JDK 8+ on Kubuntu 14.04 Trusty Bottom there is a Link for Quick Start with Java JDK 7 Development and also to Install the Java Web-Server Tomcat 7 for Kubuntu Linux.

The Contents and Details of How to Download and Install Oracle JDK 8+ on Kubuntu 14.04 Trusty are Expressly Essentials to Give Focus Only to the Essentials Instructions and Commands and Make the Tut Easier to Understand ;)

Getting-Started Oracle JDK 7 on Kubuntu 14.04 Trusty - Featured
  1. Download Oracle Java SE JDK for Linux.

    Oracle JDK i586/x8664 tar.gz
  2. Double-Click on the tar.gz Archive and Extract into/tmp
    Or from Shell:

    tar xvzf ~/Downloads/jdk-7*.tar.gz -C /tmp/

    Java JDK 7 tar.gz Extraction Path

  3. Open a Command Line Terminal Window
    (Press “Enter” to Execute Commands).

    Install Oracle JDK 7 on Kubuntu 14.04 Trusty Open Terminal Window

  4. Relocate JDK 7

    sudo su

    If Got “User is Not in Sudoers file” then see: How to Enable sudo
    To Make a jvm Directory Only if Not already there
    (You can directly copy & paste the commands into the terminal)

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

    Set the root superUser as owner

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

    Then to shift the Oracle JDK 7 contents

    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

    update-alternatives --config java

    And for the Java Compiler instead:

    sudo update-alternatives --config javac

    To Switch of Java Version Just Enter the Selection Number on First, Column. :)
    Last Achieve the SuperUser session:

  6. Setting JAVA_HOME User Environment Variable (Optional).

    su [myUserName]

    Or simply:


    And Edit the Bash environment Configuration file

    nano $HOME/.bashrc


    export JAVA_HOME=/usr/lib/jvm/jdk1.7[uX]

    Replace the [uX] Looking for the Installed Java 7 Version with:

    ls /usr/lib/jvm/

    Ctr+x to Save & Exit from nano Editor :)
    Load New Bash Config:

  7. Testing New Java JDK 7 Installation:

    java -version
  8. Getting-Started with Java Development.

  9. How to Install Eclipse for Java Developers on Kubuntu

    Now Thanks to Oracle-Sun Corporation you are able to Successfully Start with Java JDK Use & Development.

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