Since the transition from java.sun.com to java.oracle.com some links are broken.
Book "Effective Java":
[http://java.sun.com/docs/books/effective/|http://java.sun.com/docs/books/effective/] (found with Google search)
[http://java.sun.com/developer/Books/effectivejava/|http://java.sun.com/developer/Books/effectivejava/] (found in Wikipedia)
Book "The Java Look and Feel Design Guidelines, Second Edition":
"Java Look and Feel Graphics Repository":
Also note that it doesn't work when I replace java.sun.com with java.oracle.com
I guess there are other links which are broken as well.
Please redirect the old links to the correct new location.