The example indexes for uiswing lessons contain the sentence "See the following image for the complete structure" but there is no image.

http://docs.oracle.com/javase/tutorial/uiswing/examples/start/index.html
http://docs.oracle.com/javase/tutorial/uiswing/examples/learn/index.html
http://docs.oracle.com/javase/tutorial/uiswing/examples/concurrency/index.html
etc....

Only http://docs.oracle.com/javase/tutorial/uiswing/examples/components/index.html actually has an image.
The other pages need to either include the same image, link to the page with the image, or remove the sentence.