Thanks Sean. After looking more into the Arduino boards I find it that USB will be so much easier, even more considering I will be most probably using a laptop.
I found this pulse oximeter on ebay that is pretty cheap: Fingertip Pulse Oximeter SPO2 USB SOFTWARE 24H RECORDE | eBay
I know accuracy and quality are not the best but since I am still attempting to build the program I think this would work. Accuracy is not the most important factor atm. They also accept returns and has a 24 month warranty which is somewhat what I am looking for.
I just hope I will be able to retrieve the data from a java file. I will do more research and ask them about it.
Thanks again Sean.