Reddit reviews Data Structures: Abstraction and Design Using Java

First off, from a fellow transfer student, Welcome to UMD!

You'll be fine with your preparation so far. A lot of people go into 131 with little or no programming experience and do fine, and you'll already have a leg up on them.
I would download eclipse at http://www.eclipse.org and start looking through the textbook from the beginning.
Here is the class web pages list for the CS department: https://www.cs.umd.edu/class/
You can find course webpages for nearly every course offered there. Many have lecture slides and projects that you can look through and work on. Many will possibly be reused for your class. Some (NOT all) are password protected, just skip them.

The best thing about Java (IMHO) is the publicly available documentation. C has next to none, Ruby's is always missing stuff or has incorrect info. The java documentation is really well-done though.
If you haven't used Java before, the javadoc for Java SE 7 can be found here: http://docs.oracle.com/javase/7/docs/api/
Get used to navigating it. The different "packages" are easy to navigate in the top left frame. In my 131 class I think the only ones we used were in java.lang and java.util.

For any math reqs you still need, I'd advise learning all the material beforehand, the math dept. is notorious for having some TAs that are cruel graders.

A note on books...I've taken 131/132/216/250/330/351, and not once has the "required" book actually been needed in the class. The 132 book I used http://www.amazon.com/Data-Structures-Abstraction-Design-Using/dp/0470128704/ref=sr_1_4?s=books&ie=UTF8&qid=1374108009&sr=1-4&keywords=data+structures was a useful reference to have for Java, but It mostly covers data structures which aren't used as much in 131. 216's Pointers on C was fairly useful as well.
The Association for Women in Computing group on campus does book sales, w/ textbooks for $5-$10 each. Never anything assigned for a class, but it's a good place to get a cheap book for a language/topic you're interested in or as a supplement.

If you're interested in Artificial Intelligence and have room on your schedule, I highly recommend taking CMSC289I w/ Dr. Reggia. There's no programming experience required and it's an excellent overview of AI concepts.

Well, that's all I've got.

We used this one: http://www.amazon.com/Data-Structures-Abstraction-Design-Using/dp/0470128704/ref=sr_1_4?ie=UTF8&qid=1371444411&sr=8-4&keywords=data+structures

but probably because it was written by the cis department. however, i did find the text to be very helpful.