inputting local filepath

I am attempting to input a database location from a txt file located
within the build folder. However, I am having a bitchin time getting
it to work with relative file location. So far, I can only get
absolute file names to work, this is useless. Any help would be
appreciated. My code can be found below....

import java.sql.*;
import javax.swing.DefaultListModel;
import java.io.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;

public class DataConnection {

    public DataConnection(){
    DataInputStream input;
    String name = "";
    File dBLocation = new File("C:\\Documents and
Settings\\Owner.JustinLaptop\\Desktop\\USC
Programs\\ConsultRequest\\build\\classes\\consultrequest\\testing\\dBURL.txt");

    dBLocation = new File("..consultrequest\\testing\\dBURL.txt");
    System.out.println(dBLocation.getParentFile());

    System.out.println(dBLocation.exists());
    try { // try to create an object representing the user-selected file
        input = new DataInputStream( new FileInputStream(dBLocation) );

        try { // try to read the file and create a string consisting of
its contents
        char ch;
            do { // read data from the file until end of file is reached
            name = "";
            ch = input.readChar();
            while ( ch != ';' ) {
            name = name + ch;
            ch = input.readChar();
            }
        }

        while ( true );
        } catch ( Exception ex ) {
        }

        try { // try to close the file
        input.close();
        } catch ( Exception ex ) {
        }

    } catch ( Exception ex ) {
        System.out.println("Database location cannot be found");
    }

    System.out.println(name);
    }

    public static void main(String[] args){

    DataConnection data = new DataConnection();
    }
}