JAVA...

Principles of Object-Oriented Programming in Java 1.1

Principles of Object-Oriented Programming in Java 1.1 can be viewed online.

 

The Java Developers Almanac 1.4

The Java Developers Almanac presents all the core Java packages and their members in an easy-to-consult format. All the code examples from the book are available here.

 

Jan Newmarch's Guide to JINI Technologies

This free online book covers topics like TroubleShooting Jini, Discovering a Lookup Service, Entry Objects, Service Registration, Client Search, Leasing, Choices for Service Architecture, Discovery Management and etc.

 

IJava Everywhere In Action

From the Mars Rover all the way to your mobile phone, Java technology is changing the world around us, and beyond. It's used in practically every major industry, from education, government, and space exploration to transportation, finance, telecommunications, and more.

 

Java Au Naturel

This is a free computer science textbook by Dr. William C. Jones, Jr. It includes the following topics: Objects, Conditionals and Boolean Methods, Loops and Parameters, Instance Variables, Class Methods and Class Variables, Basic Data Types and Expressions and etc.