References

API documentation

http://download.oracle.com/javase/8/docs/api/.

Eclipse

watch the first lesson at YouTube without downloading.

Free Online Textbooks

Trail: Learning the Java Language from Oracle covers the basics pretty well. Comes with questions and answers.
How to Think Like a Computer Scientist by Allen B. Downey is a free textbook in PDF and covers similar materials in a very similar order.
Thinking in Java by Bruce Eckel provides more help in Object-Oriented design.
Introduction to Programming Using Java by David J. Eck has a good intro to programming in the first few chapters.

Free through USF e-Library: search by title, and click on "Connect to this resource online"

Java for programmers by Deitel and Deitel. This is more advanced than our textbook, but a good reference book for more details.