File I/O in Mac OSX

Question

Does anybody know how to specify a filename and its path in MacOS X? I'm trying to read a dictionary file into a data structure, but can't get the IO to work properly. My CS professor says my code is good, but he doesn't know how to specify the path either. I've tried the following.
/hansona/Desktop/Dictionary.txt
~/hansona/Desktop/Dictionary.txt
hansona/Desktop/Dictionary.txt
Dictionary.txt
/Dictinary.txt
/Desktop/Dictionary.txt
Desktop/Dictionary.txt
I've also tried all of these using \ instead of /
NONE of them work. If anyone could throw me a bone here I would appreciate it. Also, here is my code.
import java.util.*;
import java.io.*;
public class playThing {
public static void main(String args[]) throws IOException {
String filename;
int state=0;
while(state==0){
BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Enter a path: ");
filename=stdin.readLine();
try{
File filepath = new File(filename);
FileInputStream fStream = new FileInputStream(filename);
InputStreamReader tempRead = new InputStreamReader(fStream);
BufferedReader word = new BufferedReader(tempRead);
System.out.println(word.readLine());
state=1;
catch(IOException e){
System.out.println("Error in opening input file:\n"+e.toString());
state=0;
�

Answer 1

Here is an example
String filename1 = "\directory";
String filename2 = File.separator + "directory";Both of those strings are the same. However, filename2 should work under any OS (assuming that directory exsists). Such as Unix/Linux, which use "/" as a separator.
I hope that answers your question.