HELP please in ** Traversing through folders **
Hi,
I have a small java program which when given a particular folder will generate an "index.html" file with "ahref" to all the files and folders in the selected folder.
I have pasted the code below. It uses a small text field and buttons and JFileChooser to allow the user to choose the folder.
I would LIKE TO be able to select the folder and make the code traverse into every subfolder from the seleted folder and generate a "index.html" file in each folder. I would be very grateful for any assistance to help me traverse in folders from.
Many thanks,
Asif
import java.awt.*;
import java.io.*;
import javax.swing.*;
public class IndexGenerator {
private JFrame generatorFrame;
private JPanel generatorPanel;
private JTextField dirField;
private JButton fcButton;
private JButton createButton;
private JFileChooser fc;
public IndexGenerator() {
// Create and set up the window
generatorFrame = new JFrame("Index.HTML Generator");
generatorFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create and set up the panel
generatorPanel = new JPanel(new FlowLayout());
// Add the widgets
addWigets();
// Set the default button
generatorFrame.getRootPane().setDefaultButton(fcButton);
// Add the panel to the window
generatorFrame.getContentPane().add(generatorPanel);
// Display the window
generatorFrame.pack();
generatorFrame.setVisible(true);
* Create and add the widgets.
public void addWigets() {
// Create widegets
dirField = new JTextField("Enter full path here");
fcButton = new JButton("Choose folder");
createButton = new JButton("Generate HTML");
fc = new JFileChooser();
//fc.setCurrentDirectory(new java.io.File("."));
//fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
// Open the File Chooser dialog
fcButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (fc.showOpenDialog(generatorFrame) == JFileChooser.APPROVE_OPTION) {
dirField.setText(fc.getCurrentDirectory().toString());
} else {
System.out.println("No Selection ");
// Listen to events from the Create button
createButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
// On clicking the createHTML button
createHTML();
// Add the widgets to the container
generatorPanel.add(dirField);
generatorPanel.add(fcButton);
generatorPanel.add(createButton);
* Create the GUI and show it. For thread safety,
* this method should be invoked frmo the
* event-dispatching thread
private static void createAndShowGUI() {
// Nice window decorations
JFrame.setDefaultLookAndFeelDecorated(true);
IndexGenerator ig = new IndexGenerator();
public void createHTML() {
File folder = new File(dirField.getText());
File[] listOfFiles = folder.listFiles();
for(int x=0; x < listOfFiles.length; x++) {
try {
BufferedWriter out = new BufferedWriter(new FileWriter(dirField.getText() + "\\" + "index.html"));
out.write("<HTML> \n" +
"<HEAD><TITLE>Change Requests</TITLE> \n" +
"<STYLE> \n" +
"li,ul {font-family: Verdana, Tahoma, Arial, Helvetica, sans-serif; font-size: 10pt; font-style: strong; color: #000000} \n" +
"h2 {font-family: Verdana, Tahoma, Arial, Helvetica, sans-serif; font-size: 14pt; color: #808080} \n" +
"h4 {font-family: Verdana, Tahoma, Arial, Helvetica, sans-serif; font-size: 8pt; color: #000000} \n" +
"A:link {text-decoration: none ; color: #0000FF; font-size: 8pt;} \n" +
"A:visited {text-decoration: none ; color: #740163; font-size: 8pt;} \n" +
"</STYLE> \n" +
"<BODY> \n" +
"<H2>Change Requests</H2> \n" +
"<UL> \n");
for (int i = 0; i < listOfFiles.length; i++) {
if (listOfFiles.isFile()) {
out.write("<LI><A HREF=\"" + listOfFiles[i].getName() +"\" \"target=\"_blank\">" + listOfFiles[i].getName() + "</A></LI> \n");
} else if (listOfFiles[i].isDirectory()) {
out.write("<LI><A HREF=\"" + listOfFiles[i.getName() +"\">" + listOfFiles.getName() + "/</A></LI> \n");
out.write("</UL> \n" +
"</BODY></HTML> \n");
out.close();
} catch (IOException e) { }
public static void main(String[] args) {
* Schedule a job for the event-dispatching thread:
* creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
You can make createHTML accept a folder name parameter and know nothing about dirField.getText(). This way you can call the method recursively when you find a directory. The first time you will call it with dirField.getText() of course, and then it will traverse subfolders by calling itself with the found folder name.
HTH
Mike
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