hello I have a task to filter a java code into viewing only text files

here is the task

filter the open Dialog(File chooser ) so that you can only display the information about txt files only

and this is the code for the File Chooser:

/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package filechooser; import java.io.IOException; import java.nio.file.DirectoryStream; import java.nio.file.Files; import java.nio.file.Path; import javax.swing.JFileChooser; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JScrollPane; import javax.swing.JTextArea;

public class FileChooser {

/** * @param args the command line arguments */ public static void main(String[] args) throws IOException { JFileChooserDemo application = new JFileChooserDemo(); application.setSize(400, 400); application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); application.setVisible(true); } } // end class JFileChooserTest

class JFileChooserDemo extends JFrame { private final JTextArea outputArea; // displays file contents // set up GUI public JFileChooserDemo() throws IOException { super("JFileChooser Demo"); outputArea = new JTextArea(); add(new JScrollPane(outputArea)); // outputArea is scrollable analyzePath(); // get Path from user and display info }

// display information about file or directory user specifies public void analyzePath() throws IOException { // get Path to user-selected file or directory Path path = getFileOrDirectoryPath();

if (path != null && Files.exists(path)) // if exists, display info { // gather file (or directory) information StringBuilder builder = new StringBuilder(); builder.append(String.format("%s:%n", path.getFileName())); builder.append(String.format("%s a directory%n", Files.isDirectory(path) ? "Is" : "Is not")); builder.append(String.format("%s an absolute path%n", path.isAbsolute() ? "Is" : "Is not")); builder.append(String.format("Last modified: %s%n", Files.getLastModifiedTime(path))); builder.append(String.format("Size: %s%n", Files.size(path))); builder.append(String.format("Path: %s%n", path)); builder.append(String.format("Absolute path: %s%n", path.toAbsolutePath()));

if (Files.isDirectory(path)) // output directory listing { builder.append(String.format("%nDirectory contents:%n")); // object for iterating through a directory's contents DirectoryStream directoryStream = Files.newDirectoryStream(path); for (Path p : directoryStream) builder.append(String.format("%s%n", p)); }

outputArea.setText(builder.toString()); // display String content } else // Path does not exist { JOptionPane.showMessageDialog(this, path.getFileName() + " does not exist.", "ERROR", JOptionPane.ERROR_MESSAGE); } } // end method analyzePath

// allow user to specify file or directory name private Path getFileOrDirectoryPath() { // configure dialog allowing selection of a file or directory JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode( JFileChooser.FILES_AND_DIRECTORIES); int result = fileChooser.showOpenDialog(this);

// if user clicked Cancel button on dialog, return if (result == JFileChooser.CANCEL_OPTION) System.exit(1);

// return Path representing the selected file return fileChooser.getSelectedFile().toPath(); } } // end class JFileChooserDemo