JAVA tutorials for beginners. We recommend you to read and follow
either (or both) of the following JAVA tutorials if you have never
programmed in this language:
The Java Tutorials <http://download.oracle.com/javase/tutorial/index.html>.
Inside section "Trails Covering the Basics", you can follow the
following tutorials at least: "Getting Started", "Learning the Java
Language", and "Essential Java Classes".
Java Platform, Standard Edition 7 API Specification <http://download.oracle.com/javase/7/docs/api/>.
Use this as a reference for using the methods provided by some of the
main Java libraries.