Hi,

Im trying to list all the drives in the local machine in a combo box and when a drive selected all the folders and files in that drive must be listed ina list box.

I was succesfull in listing the drives in the combobos.But when i try to list the folders in the list box im getting error like this:

Error:
Prod_applet.java:226: Cannot find symbol
symbol : variable local_jlist
location: class Prod_applet
local_jlist.addElement(local_files[i]);

1 error

Can any one help me in solving this problem ASAP please?Just got struck with it
i have given the code below.

Thankyou



Prod_applet.java
--------------------
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.File;
import java.io.FilenameFilter;
import java.io.FileFilter;

public class Prod_applet extends JFrame implements ItemListener{
boolean inAnApplet = true;
final boolean shouldFill = true;
final boolean shouldWeightX = true;

public Prod_applet() {
JPanel local_window = new JPanel();
JPanel server_window = new JPanel();
JPanel button_window = new JPanel();
JPanel action_window = new JPanel();
JButton connect = new JButton("Connect");
connect.setMargin(new Insets(0, 0, 0, 0));
JButton disconnect = new JButton("Disconnect");
disconnect.setMargin(new Insets(0, 0, 0, 0));
JButton up_but = new JButton(">>");
up_but.setMargin(new Insets(0, 0, 0, 0));
JButton down_but = new JButton("<<");
down_but.setMargin(new Insets(0, 0, 0, 0));
JLabel local_lbl = new JLabel("Local Site");
JLabel server_lbl = new JLabel("Remote Site");
JComboBox local_combobox = new JComboBox();
local_combobox.setEditable(true);
JComboBox server_combobox = new JComboBox();


List local_jlist = new List();
//local_jlist.setMargin(new Insets(0, 0, 0, 0));
List server_jlist = new List();
//server_jlist.setMargin(new Insets(0, 0, 0, 0));
JButton local_mkdir = new JButton("MkDir");
local_mkdir.setMargin(new Insets(0, 0, 0, 0));
JButton server_mkdir = new JButton("MkDir");
server_mkdir.setMargin(new Insets(0, 0, 0, 0));
JButton local_delete = new JButton("Delete");
local_delete.setMargin(new Insets(0, 0, 0, 0));
JButton server_delete = new JButton("Delete");
server_delete.setMargin(new Insets(0, 0, 0, 0));
JButton local_refresh = new JButton("Refresh");
local_refresh.setMargin(new Insets(0, 0, 0, 0));
JButton server_refresh = new JButton("Refresh");
server_refresh.setMargin(new Insets(0, 0, 0, 0));
Container contentPane = getContentPane();
BorderLayout border = new BorderLayout();
contentPane.setLayout(border);
contentPane.add(local_window, BorderLayout.WEST);
contentPane.add(server_window, BorderLayout.EAST);
contentPane.add(button_window, BorderLayout.CENTER);
contentPane.add (action_window, BorderLayout.SOUTH);
GridBagLayout gridbag = new GridBagLayout();
GridBagConstraints c = new GridBagConstraints();
c.insets = new Insets(2, 2, 2, 2);
GridBagConstraints c1 = new GridBagConstraints();
c1.insets = new Insets(2, 2, 2, 2);
GridBagConstraints c2 = new GridBagConstraints();
c2.insets = new Insets(2, 2, 2, 2);
GridBagConstraints c3 = new GridBagConstraints();
c3.insets = new Insets(2, 2, 2, 2);
GridBagConstraints c4 = new GridBagConstraints();
c4.insets = new Insets(2, 2, 2, 2);
GridBagConstraints c5 = new GridBagConstraints();
c5.insets = new Insets(2, 2, 2, 2);
GridBagConstraints c6 = new GridBagConstraints();
c6.insets = new Insets(2, 2, 2, 2);
local_window.setLayout(gridbag);
server_window.setLayout(gridbag);
button_window.setLayout(gridbag);
action_window.setLayout(gridbag);
File[] drives = File.listRoots();
for(int i = 0 ; i <drives.length;i++)
{
local_combobox.addItem(drives[i]);
server_combobox.addItem(drives[i]);
}
local_combobox. addItemListener(this);
server_combobox. addItemListener(this);
//Connect Button
c.gridx = 0;
c.gridy = 0;
gridbag.setConstraints(connect, c);
local_window.add(connect);
//Disconnect Button
c.gridx = 25;
c.gridy = 0;
gridbag.setConstraints(disconnect, c);
server_window.add(disconnect);

//Local Label
c1.gridx = 0;
c1.gridy = 3;
gridbag.setConstraints(local_lbl, c1);
local_window.add(local_lbl);
//Local combobox
c1.gridx = 10;
c1.gridy = 3;
gridbag.setConstraints(local_combobox, c1);
local_window.add(local_combobox);
//Server Label
c1.gridx = 25;
c1.gridy = 3;
gridbag.setConstraints(server_lbl, c1);
server_window.add(server_lbl);
//Server combobox
c1.gridx = 35;
c1.gridy = 3;
gridbag.setConstraints(server_combobox, c1);
server_window.add(server_combobox);

//Local jlist
c2.gridx = 0;
c2.gridy = 6;
gridbag.setConstraints(local_jlist, c2);
local_window.add(local_jlist);

//Server jlist
c2.gridx = 25;
c2.gridy = 6;
gridbag.setConstraints(server_jlist, c2);
server_window.add(server_jlist);

//Up Button
c3.gridx = 10;
c3.gridy = 8;
gridbag.setConstraints(up_but, c3);
button_window.add(up_but);

//Down Button
c3.gridx = 10;
c3.gridy = 9;
gridbag.setConstraints(down_but, c3);
button_window.add(down_but);

//local_mkdir
c4.gridx = 0;
c4.gridy = 10;
gridbag.setConstraints(local_mkdir,c4);
action_window.add(local_mkdir);

//server_mkdir
c4.gridx = 25;
c4.gridy = 10;
gridbag.setConstraints (server_mkdir, c4);
action_window.add(server_mkdir);

//local_delete
c5.gridx = 1;
c5.gridy = 10;
gridbag.setConstraints(local_delete, c5);
action_window.add(local_delete);

//server_delete
c5.gridx = 26;
c5.gridy = 10;
gridbag.setConstraints(server_delete, c5);
action_window.add(server_delete);

//local_refresh
c6.gridx = 2;
c6.gridy = 10;
gridbag.setConstraints(local_refresh, c6);
action_window.add(local_refresh);

//server_refresh
c6.gridx = 27;
c6.gridy = 10;
gridbag.setConstraints(server_refresh, c6);
action_window.add(server_refresh);

addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
if (inAnApplet) {
dispose();
} else {
System.exit(0);
}
}
});
}
public void itemStateChanged(ItemEvent e)
{
JComboBox local_combobox = (JComboBox)e.getSource();
JComboBox server_combobox = (JComboBox)e.getSource();
String newSelectionStrName_local = null;
String newSelectionStrName_server = null;
if ( local_combobox.getSelectedItem() instanceof File)
{
File newSelection_local = (File)local_combobox.getSelectedItem();
newSelectionStrName_local = newSelection_local.getPath();
}
else if (local_combobox.getSelectedItem() instanceof String)
{
newSelectionStrName_local = (String) local_combobox.getSelectedItem();
}
if ( server_combobox.getSelectedItem() instanceof File)
{
File newSelection_server = (File)server_combobox.getSelectedItem();
newSelectionStrName_server = newSelection_server.getPath();
}
else if (server_combobox.getSelectedItem() instanceof String)
{
newSelectionStrName_server = (String) server_combobox.getSelectedItem();
}
File file1 = new File(newSelectionStrName_local);
File file2 = new File(newSelectionStrName_server);
String[] local_files = file1.list();
for (int i=0;i<local_files.length;i++)
{

local_jlist.addElement(local_files[i]);

}

}

public static void main(String args[]) {
Prod_applet window = new Prod_applet();
window.setSize(800,600);
window.inAnApplet = false;
window.setTitle("FTP_CLIENT");
window.pack();
window.setVisible(true);
}
}