Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Fix error codes in "the largest file" include comments

DirectoryController.java:15: error
DirectoryController.java:25

  • modify code to sucessfully compile
  • Include GUI components to display user input errors
  • show local time for the "Last Modified" time stamp.

"LargestFileA7.java"

public class LargestFileA7 {
public static void main(String[] args) {
// Create instances of the model, view, and controller
DirectoryModel model = new DirectoryModel();
DirectoryView view = new DirectoryView();
DirectoryController controller = new DirectoryController(model, view);
}
}

"DirectoryView.java"

import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
import java.awt.event.*;
import java.io.IOException;
import java.nio.file.*;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DirectoryView extends JFrame {
private JTextField directoryField;
private JTextArea resultArea;
private JButton browseButton;

public DirectoryView() {
setTitle("Directory Explorer");
setSize(400, 300);
setDefaultCloseOperation(EXIT_ON_CLOSE);

JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());

JLabel directoryLabel = new JLabel("Enter Directory Path:");
directoryField = new JTextField(20);
browseButton = new JButton("Browse");
browseButton.addActionListener(new BrowseListener());
resultArea = new JTextArea(10, 30);
resultArea.setEditable(false);

JPanel inputPanel = new JPanel(new BorderLayout());
inputPanel.add(directoryLabel, BorderLayout.WEST);
inputPanel.add(directoryField, BorderLayout.CENTER);
inputPanel.add(browseButton, BorderLayout.EAST);

panel.add(inputPanel, BorderLayout.NORTH);

JScrollPane scrollPane = new JScrollPane(resultArea);
panel.add(scrollPane, BorderLayout.CENTER);

add(panel);
setVisible(true);
}

// Method to get the directory path entered by the user
public String getDirectoryPath() {
return directoryField.getText();
}

// Method to display the result in the text area
public void displayResult(String result) {
resultArea.setText(result);
}

// Method to display error message in a dialog box
public void displayErrorMessage(String message) {
JOptionPane.showMessageDialog(this, message, "Error", JOptionPane.ERROR_MESSAGE);
}

// Method to disable the Browse button during file traversal
public void disableBrowseButton() {
browseButton.setEnabled(false);
}

// Method to enable the Browse button after file traversal
public void enableBrowseButton() {
browseButton.setEnabled(true);
}

// ActionListener for Browse button
class BrowseListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
// Action to perform when Browse button is clicked
JFileChooser fileChooser = new JFileChooser();
fileChooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
int returnValue = fileChooser.showOpenDialog(null);
if (returnValue == JFileChooser.APPROVE_OPTION) {
directoryField.setText(fileChooser.getSelectedFile().getAbsolutePath());
}
}
}
}

Please complete "DirectoryModel.Java"

import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import java.io.IOException;

public class DirectoryModel {
private Path largestFilePath;
private long largestFileSize;

public DirectoryModel() {
largestFilePath = null;
largestFileSize = 0;
}


public void findLargestFile(Path directoryPath) {
try {
Files.walkFileTree(directoryPath, new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
if (attrs.size() > largestFileSize) {
largestFileSize = attrs.size();
largestFilePath = file;
}
return FileVisitResult.CONTINUE;

Please include the "DirectoryController.java" file

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