sorry, my code is:

// FileChooserPanel.java
package test.applets;

import java.io.File;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JTextField;
import javax.swing.JFileChooser;
import javax.swing.filechooser.*;

//import javax.swing.JLabel;

public class FileChooserPanel extends JPanel
                             implements ActionListener {
   JTextField uploadpath;
   JButton opendirButton;
   JFileChooser fc;

   public FileChooserPanel() {
       fc = new JFileChooser();
       uploadpath = new JTextField(20);
       JPanel uploadpathPanel = new JPanel();
       uploadpathPanel.add(uploadpath);

       opendirButton = new JButton("Open File...");
       opendirButton.addActionListener(this);
       JPanel buttonPanel = new JPanel();
       buttonPanel.add(opendirButton);

       add(uploadpathPanel);
       add(buttonPanel);

       // this will be ok
       //JLabel lab = new JLabel("Hello, World!");
       //add(lab);

   }

   public void actionPerformed(ActionEvent e) {
       if (e.getSource() == opendirButton) {
           fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
           int returnVal = fc.showOpenDialog(FileChooserPanel.this);

           if (returnVal == JFileChooser.APPROVE_OPTION) {
               File file = fc.getSelectedFile();
               uploadpath.setText(file.toString());
           }
           else {
               uploadpath.setText("");
           }
       }
   }

}

// FileChooserApplet.java
package test.applets;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JApplet;
import javax.swing.JLabel;
import javax.swing.UIManager;

import test.applets.FileChooserPanel;

public class FileChooserApplet extends JApplet {
       private void createGUI() {
               FileChooserPanel fcp = new FileChooserPanel();
               fcp.setOpaque(true);
               fcp.setBackground(Color.white);
               setContentPane(fcp);
       }

   public void init() {
       try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
           javax.swing.SwingUtilities.invokeAndWait(new Runnable() {
                       public void run() {
                               createGUI();
                       }
               });
       }
       catch (Exception e) {
               System.err.println("createGUI didn't successfully
complete");
       }
   }

}