import javax.swing.*;

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.util.Timer;

import java.util.TimerTask;

public class HtmlWatcher {

private String htmlFilePath;

private String previousContent = "";

private JFrame frame;

private JTextArea textArea;

public HtmlWatcher(String htmlFilePath) {

this.htmlFilePath = htmlFilePath;

// Create GUI

frame = new JFrame("HTML Watcher");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(800, 600);

textArea = new JTextArea();

textArea.setEditable(false);

JScrollPane scrollPane = new JScrollPane(textArea);

frame.add(scrollPane);

frame.setVisible(true);

// Start watching

Timer timer = new Timer();

timer.scheduleAtFixedRate(new WatchTask(), 0, 1000); // Check every 1 second

}

private class WatchTask extends TimerTask {

@Override

public void run() {

try {

String currentContent = readHtmlFile();

if (!currentContent.equals(previousContent)) {

textArea.setText(currentContent);

previousContent = currentContent;

System.out.println("HTML file changed."); // Simple error message

}

} catch (IOException e) {

textArea.setText("Error reading HTML file: " + e.getMessage());

System.err.println("Error reading HTML file: " + e.getMessage());

}

}

}

private String readHtmlFile() throws IOException {

try (BufferedReader reader = new BufferedReader(new FileReader(htmlFilePath))) {

StringBuilder content = new StringBuilder();

String line;

while ((line = reader.readLine()) != null) {

content.append(line).append("\n");

}

return content.toString();

}

}

public static void main(String[] args) {

// Replace with your HTML file path

String htmlFilePath = "example.html";

SwingUtilities.invokeLater(() -> new HtmlWatcher(htmlFilePath));

}

}