Secure Tomcat Hosting: Restrict Access to Your Web Application – DZone Security

A developer gives a quick tutorial on how to add user authentication protocols to a Tomcat-based web application by writing a little bit of code in XML.
— Read on dzone.com/articles/secure-tomcat-hosting-restrict-access-to-your-web

How to Learn Java With Exploratory Programming – DZone Java

This collection of IDE support, Javadocs, and testing with JUnit is what one dev terms “exploratory programming.” See how to use it to write better code.
— Read on dzone.com/articles/how-to-learn-java-with-exploratory-programming

To each their own style of learning, but these are some good thoughts.