Java version 1.7.n_nn has not been certified. Only Java versions less than 1.7 are certified. Continue anyway?

When I tried to start Run Oracle SQL Developer on window 7 x86, i found this warning:

Java version 1.7.n_nn has not been certified. 

Only Java versions less than 1.7 are certified. Continue anyway?

And when i search for the solution,
i found that at the official site !!!

Note:

If you attempt to use SQL Developer with a Java SDK version 1.7 or higher, a warning message in this form is displayed: "Java version 1.7.n_nn has not been certified. Only Java versions less than 1.7 are certified. Continue anyway?" However, if you click Yes to continue, an error is displayed.

Instead, if you use a Java SDK, use version 1.6.nn where nn is 11 or higher.

http://docs.oracle.com/cd/E35137_01/doc.32/e35119/install.htm

How to stop warning ? Download Java SE6 jdk to install
http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-javase6-419409.html
and point the path to  Oracle SQL Developer.

However ....after that , there is another warming was found.