The Guide Show Step-by-Step How-to Install and Getting-Started with the Latest Oracle-Sun Official Java SE JDK7 32bit on Linux BackTrack/Kali 5 R3 32bit KDE4 Desktop.
After Installing you will need to Use the update-alternatives Command Tool to Update your System Java to Oracle Java 1.7 JDK7.
To the Post 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 Linux BackTrack.
To Make the Entire Process Easier to Visualize and Retain the Article Includes the Basic Screenshots of the Essentials Steps Involved.
The Content and Details are Expressly Reduced to Give Focus Only to the Essentials Instructions and Commands and Make Tut more Easy & Digestive;)

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Guides to Installing the Tomcat 7 Server on Linux BackTrack: