Don't take this at all the wrong way, but have are you familiar with the Java api? You are possibly not declaring it properly, or do not have the proper library imported. Check here:
http://java.sun.com/j2se/1.5.0/docs/...ArrayList.html
If you have a difficult time with it, just ask. They are a little difficult to understand at first (they were for me anyway). But it will tell you all you need to know.
