Faulty instructions on an oracle web page...
On
https://docs.oracle.com/middleware/1212/adf/ADFUI/gs_demo.htm#ADFUI12741
It mentions
click the ADF Faces Rich Client Components Demo link in the Download section of the page.
But in order to get to the ADF Faces Rich Client Components Demo you must click on Documentation first
and then click on
Oracle JDeveloper and Oracle ADF 12c — Code Samples
then you can click on ADF Faces Rich Client Components Demo