JAVA: I/O:streams writing/reading to various directories

Hello all,
I have a very minimal knowledge base on File I/O and data streams, enough to get the job done. What i dont know however is how to open an input or output stream that will read from or write to a file in a directory other than the one where the source code is located. I believe of the top of my head you would create an input stream like so: BufferedReader name = new BufferedReader(new FileReader(filename)); . However if i have to create and recall from a large array of file it is very inconvinent to store them in the same directory. Please, someone let me know if there is something i can do. Thanks in advance.
Bryan