A valuable server side java programming guide/reference
With the proliferation of java server side technologies, this tutorial from Sun is very well laid out and quite refreshing. Unlike the title this tutorial actually covers servlets, jsp, tags, web services, jaxb, soap, xslt, jsf, localization, tomcat. Essentially everything that is needed to create real world server side applications with the exceptions of EJBs. I am not complaining on that account :-). Any way good job who ever has done it.
Here is a Java knowledge folder link I maintain for keeping some sample code and java related links.