Oracle Java JDK7 64-bit Howto Install and Getting Started on Linux Xubuntu 12.04 Precise Amd64 Easy Visual-Guide

The Guide shows you in Easy-Steps How to Install and Getting-Started with the Oracle-Sun Official Java JDK x64 for Linux Xubuntu 12.04 Precise Pangolin Unity 64-bit 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 Post 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 Xubuntu.

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

The Contents and Details of Guide are Expressly Essentials to Give Focus Only to the Essentials Instructions and Commands to Make the Tut Easier to Read & Understand ;)

1. Download Oracle Java SE JDK 7:

   JDK 7 i586.tar.gz
   On the JDK Section Select the i586.tar.gz Release

2. Double-Click on the tar.gz Archive and Extract into /tmp
   

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

4. Relocate JDK 7

   sudo su

   If Got “User is Not in Sudoers file” then see: How to Enable sudo

   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.

   sudo 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

   Installing Oracle Java Plugin.

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