Viewing a directory in a list box

Question

Hi, I am new to java, so dont be to harsh.
I am using J Builder 5.
I wish to view a directory in a list box, when a button is pressed.
The button should bring up a dialog box to accept user input.
I have already created the frame and button, but I dont know how to
get the button to display the directory in the list box.
I would be grateful of any help.
John.
Here is my code so far:
FRAME1.java
==========
package coursework;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame {
JPanel contentPane;
BorderLayout borderLayout1 = new BorderLayout();
JPanel jPanel1 = new JPanel();
JPanel jPanel2 = new JPanel();
JPanel jPanel3 = new JPanel();
JPanel jPanel4 = new JPanel();
private Button setdir, exit, notes, all, pics, movies, music;
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();
JButton jButton3 = new JButton();
JButton jButton4 = new JButton();
GridLayout gridLayout1 = new GridLayout();
JButton jButton5 = new JButton();
JButton jButton6 = new JButton();
JButton jButton7 = new JButton();
JTextArea jTextArea1 = new JTextArea();
JScrollPane jScrollPane1 = new JScrollPane();
/**Construct the frame*/
public Frame1() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
catch(Exception e) {
e.printStackTrace();
/**Component initialization*/
private void jbInit() throws Exception {
//setIconImage(Toolkit.getDefaultToolkit().createImage(Frame1.class.getResource("[Your Icon]")));
contentPane = (JPanel) this.getContentPane();
contentPane.setLayout(borderLayout1);
this.setForeground(Color.lightGray);
this.setSize(new Dimension(415, 350));
this.setTitle("Media Catalogue");
Button jbutton1 = all;
Button jbutton2 = pics;
Button jbutton3 = music;
Button jbutton4 = movies;
Button jbutton5 = exit;
Button jbutton6 = setdir;
Button jbutton7 = notes;
jButton1.setMnemonic('0');
jButton1.setText("All");
jButton2.setText("Pictures");
jButton3.setText("Music");
jButton4.setText("Movies");
jButton5.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton5_actionPerformed(e);
jPanel2.setLayout(gridLayout1);
gridLayout1.setRows(4);
gridLayout1.setColumns(1);
gridLayout1.setHgap(8);
gridLayout1.setVgap(2);
jButton5.setText("Exit");
jButton6.setText("Set Root Directory");
jButton7.setText("View Notes");
jTextArea1.setBackground(UIManager.getColor("text"));
jTextArea1.setText("Multi Media Catalogue");
contentPane.add(jPanel2, BorderLayout.EAST);
jPanel2.add(jButton4, null);
jPanel2.add(jButton3, null);
jPanel2.add(jButton2, null);
jPanel2.add(jButton1, null);
contentPane.add(jPanel3, BorderLayout.SOUTH);
jPanel3.add(jButton5, null);
jPanel3.add(jButton6, null);
jPanel3.add(jButton7, null);
contentPane.add(jPanel4, BorderLayout.WEST);
contentPane.add(jPanel1, BorderLayout.NORTH);
jPanel1.add(jTextArea1, null);
contentPane.add(jScrollPane1, BorderLayout.CENTER);
jButton6.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jButton6_actionPerformed(e);
/**Overridden so we can exit when window is closed*/
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
void jButton5_actionPerformed(ActionEvent e) {
System.exit(0);
void jButton6_actionPerformed(ActionEvent e) {
APPLICATION1.java
=================
package coursework;
import javax.swing.UIManager;
import java.awt.*;
public class Application1 {
boolean packFrame = false;
/**Construct the application*/
public Application1() {
Frame1 frame = new Frame1();
//Validate frames that have preset sizes
//Pack frames that have useful preferred size info, e.g. from their layout
if (packFrame) {
frame.pack();
else {
frame.validate();
//Center the window
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
frame.setVisible(true);
/**Main method*/
public static void main(String[] args) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
catch(Exception e) {
e.printStackTrace();
new Application1();
}

Answer 1

I am not quite sure if this is what you are looking for, but I was doing stuff with listing directories a while ago, and this is how I did it.
When the user changed directory on the GUI, I called a function called listDirectory(), which changed the contents of a JTable to be the details of the files in that directory, the following is the listDirectory function:
private void listDirectory()
File flDirectory = new File(strWorkingDir);
ExtensionFilter udtAllowedFiles = new ExtensionFilter("*.*");
udtAllowedFiles.setConstraints(ExtensionFilter.FILES_ONLY);
String [] strListFiles = flDirectory.list(udtAllowedFiles);
strDirContents = new String[strListFiles.length][3];
Vector vctCheckedOutFiles = udtParent.getLockedFiles(strWorkingDir);
for(int i=0; i<strListFiles.length; i++)
/*add the file information to the strDirContents array*/
jtlListing.setModel(new DefaultTableModel(
strDirContents,
new String [] {"Name", "Type", "Last Modified"}
Note, the ExtensionFilter implements the class FilenameFilter.
You should be able to use a JList instead of the JTable, if that is what you need.
Any other questions, or if this doesn't answer your query, let me know,
S