Setting a directory path

Question

I'm finding that I can only edit all the files within a directory that the program runs in. Is there a way of setting a directory path and being able to play with the files within.
I've set the path with the "." before, but could not change anyything, not unless the program resides in the directory.
I saw setdirectory(), method but couldn't get it to work, is this only for File chooser.
File directory = new File(".");
File[] files = directory.listFiles();
for(int x = 0; x < files.length; x++)
                 if(files[x].isFile()) dim.addElement(files[x].getName());;
        }

Answer 1

Java doesn't have anything like chdir command. You can use relative paths from the default path or you can use an absolute path in a File object.
For example:
new File("c:\\windows\\system32\\cmd.exe").rename("c:\\windows\\system32\\newname.exe");