JFileChooser doesn't work as it should!

Hi.I stumbled over a problem a few days ago and can't see how to resolve it.
I want to use JFileChooser to select folder(not files).So i done the code and everything work but if i select the folder "/home/john/Documents/" JFileChooser return me "/home/john/" if i select "/home/john/Documents/books/" ,JFileChooser return me "/home/john/Documents".The same thing happens for every path i choose:it returns me the upper folder of what i select.
And the funny thing is that if try this codeSelect a directory with a JFileChooser - Real's Java How-to everything works ok but not my code although the difference is not that big.Here is my code :

Code:

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import java.awt.Component;
import java.io.File;

import javax.swing.*;

/**
 * @author faur
 *
 */
public class DirectoryChooser {
        /**
        *
        */
        private static final long serialVersionUID = 1L;
        JFileChooser folderBrowse;
        private int returnVal;
        private String lastLocation;
        Component parent;
        DirectoryChooser(Component parent,String lastFolder,String title){
                lastLocation = lastFolder;
                this.parent = parent;
                folderBrowse = new JFileChooser(new File(lastFolder));
                folderBrowse.setDialogTitle(title);
                //choose only directories and disable file filter selection
                folderBrowse.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
                folderBrowse.setAcceptAllFileFilterUsed(false);
               
                returnVal = folderBrowse.showOpenDialog(parent);
        }
        public String getDirectory(){
                if(returnVal == JFileChooser.APPROVE_OPTION){
                        System.out.println(folderBrowse.getCurrentDirectory());
                        return folderBrowse.getCurrentDirectory().toString();
                        }
                else return lastLocation;
        }

}

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Code:

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import javax.swing.*;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.GridLayout;

public class GUI extends JFrame implements SwingConstants{
       
        /**
        *
        */
        private static final long serialVersionUID = 1L;
        JButton folderBtn;
        JTextField folderTxt;
        JLabel jlBrowse;
        String lastFolder;

        GUI(String title){
                super(title);
                lastFolder = System.getProperty("user.home");
                setDefaultCloseOperation(EXIT_ON_CLOSE);
                setLayout(new GridLayout(1,3,5,5));
                init();
               
               
        }
        void init(){
                jlBrowse = new JLabel("Path:");
                jlBrowse.setHorizontalAlignment(CENTER);
                folderTxt = new JTextField("                                              ");
                folderBtn = new JButton("Browse");
                folderBtn.addActionListener(new BtnActionListener());
                add(jlBrowse); add(folderTxt); add(folderBtn);
                pack();
                setVisible(true);
        }
       
        class BtnActionListener implements ActionListener {

                @Override
                public void actionPerformed(ActionEvent e) {
                        DirectoryChooser folderBrowse = new
                                                                                DirectoryChooser(GUI.this,GUI.this.lastFolder,"Choose directory...");
                       
                                GUI.this.lastFolder = folderBrowse.getDirectory();
                                GUI.this.folderTxt.setText(GUI.this.lastFolder);
                }
        }       
               
        }

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Please if you have any ideas about what is wrong don't hesitate.I turned the internet upside down but didn't find any resolve.Thanks

What did you think getCurrentDirectory() does? and why does JFileChooser have a method getSelectedFile()?

db