Java JDK Versions?

I am installing 11g XE, Weblogic, Forms & Reports, and SQLDesigner for a class and I don't understand why it keep whining about needing obsolete JDK versions. We all know there was a big uproar over Java security issues over the past few years so I don't understand why this software would be complaining when I try to tell it to use the current JDK version. Isn't Java JDK always written to be backward compatible? What about the real installations of this software? Or is the JDK version irrelevant if the JRE is up to date?

Hey guys,
Sorry in advance if my question is a bit uncalled for in this thread.
Somehow I have not managed to get the latest version of Java (1.6.0_31) installed on my MacBook.
According to JavaTester.org I have version 1.6.0_29 which is confirmed by my Java Preferences Panel.
The only 2 versions listed in the panel are 1.6.0_29 (64-bit) and 1.6.0_29 (32-bit)
The webplugin check from firefox states that 'Java Applet Plug-in" is not up to date.
Firefox Add-on Tab says I have 'Java Applet Plug-in' version 14.0.3
Oracle.com says the latest version of Java is  Version 7 Update 3
Java.com says the latest version of Java is Version 6 Update 31
Furthermore Java.com says updates will be automatically download through 'Apple Software Update' but it shows no sign of an update.
What's wrong? What is the latest version of both Java JDK and Applet? How can I fix this?
{- Mac OS X 10.7.3 Lion
{- Firefox 10.0.2

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