Notes

import java.io.IOException;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import javax.swing.JFileChooser; // Added missing import
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public 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<Path> 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();
}

// Main method to run the application
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 JFileChooserDemo