On which site can I get java extended topics / articles / blogs that are very accurate (something like ibmdeveloperworks)
try it
http://www.javalearner.com/advanced.htm
I think you know the standard
http://download.oracle.com/javase/tutorial/and (less advanced)http://www.java2s.com/Tutorial/Java/CatalogJava.htm
I like it. Recommend it. Is always. The Really Big Index List all pages of content in a Java tutorial.
. :
, , Google Java .