You can use the system property "user.dir" to get the working directory.
 You can also try using "." for creating the new File but I am not sure
how portable that is.

Try the following code (I have not tested it!)  -

String workDirName  = System.getProperty("user.dir");
File  workingDir = new File(workDirName);

Notice that it is quite possible that the working directory is NOT
writable. You can also try using the other system property "user.home"
to find a directory which is usually writable.

Abhijat