If you'd like to know more about the Google Collections Library, here's a video you can watch:
It continues here. Or if you're in a rush you can just skim the slides, not that I recommend it. :-)
Hope you find it informative!
Personal ramblings of Kevin Bourrillion, senior software engineer at Google, Inc.
No, my opinions as expressed in this blog are not those of my employer. They're mine alone. That's why they're called "my opinions." Helloooo.