[Spookster]

Here are some source files for working with various data structures in java

http://www.cs.fiu.edu/~weiss/dsj2/code/code.html
http://www.cs.fiu.edu/~weiss/dsaajava/code/

That was from the book we used in my college data structures course.

There are some tutorial located here
http://www.dickbaldwin.com/tocint.htm