1. Navigate to JDK7 JavaDoc:

http://docs.oracle.com/javase/7/docs/api/

2. Select javax.swing from the list of packages

3. Go to the package description doc

4. Scroll to the very bottom of the document and find the link titled "How To Use Threads"

5. The link leads to

http://java.sun.com/docs/books/tutorial/uiswing/misc/threads.html

which is redirected to

http://docs.oracle.com/javase/tutorial/uiswing/misc/threads.html

which is not found (HTTP/404) and should be corrected to

http://docs.oracle.com/javase/tutorial/uiswing/concurrency/index.html