Oracle-Sun Java JDK7 How to Install and Getting Started on Linux Debian 7 Wheezy Gnome3 32bit Easy Visual-Guide

The Guide shows you Step-by-Step How to Install and Getting-Started with the Oracle-Sun Official Java JDK i586 on Debian Linux 7 Wheezy GNOME3 i386 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 Debian.

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.

1. Here Download Oracel-Sun Java SE JDK:

   Oracle JDK i586 tar.gz
   Link to Download the Latest Oracle-Sun Java SE JDK 32-bit Linux Release

2. Find and Double-Click on the tar.gz Archive

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

4. Relocate JDK 7

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   su 

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

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   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.

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

   Reiterate the Execution Permission over the Java binaries

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

   Finally, Shift the Java contents with

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   mv /tmp/jdk1.7* /usr/lib/jvm/

5. Installing Oracle Java JDK 7

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   update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7*/bin/java 1065

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   update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7*/bin/javac 1065

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   update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.7*/bin/jar 1065

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   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.

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   update-alternatives --config java

   And for the Java Compiler instead:

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   sudo update-alternatives --config javac

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

6. Optionally Set Java Environment Variable.

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   su <myUser>

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   nano $HOME/.bashrc

   Append:

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

   Ctrl+x to Save & Exit from nano :)

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   source $HOME/.bashrc

7. How to Install Oracle Java Browser Plug-In:

   Here Install Oracle Java Firefox PlugIn

   How to Install Oracle Java JDK Firefox Plugin

Guides to Installing the Tomcat7 Server on Debian Linux: