I can get the following to work it won't sort the phone_numbers.dat file for the java program

Complete the implementation for the Sort menu item in the Edit menu. When Sort is selected, the entries should be sorted and displayed alphabetically according to last name + first name.

import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; import java.io.*; import java.util.Vector; import java.util.ArrayList;

public class ContactList extends JFrame implements ActionListener, ListSelectionListener { JMenuItem newMI, openMI, saveMI, saveAsMI, exitMI; JMenuItem searchMI, deleteMI, updateMI, newEntryMI, sortMI; JTextField lastName, firstName, phoneNumber; JList listView;

DefaultListModel nameList = new DefaultListModel();

Vector numberList = new Vector();

File currentFile = null;

/** * Constructor */

public ContactList() {

super("Phone Contacts"); // set frame title

setLayout(new BorderLayout()); // set layout

// create menu bar JMenuBar menubar = new JMenuBar(); setJMenuBar(menubar);

// create file menu JMenu fileMenu = new JMenu("File"); menubar.add(fileMenu); newMI = fileMenu.add(new JMenuItem("New")); newMI.addActionListener(this); openMI = fileMenu.add(new JMenuItem("Open")); openMI.addActionListener(this); fileMenu.addSeparator(); saveMI = fileMenu.add(new JMenuItem("Save")); saveAsMI = fileMenu.add(new JMenuItem("Save As ...")); fileMenu.addSeparator(); exitMI = fileMenu.add(new JMenuItem("Exit")); exitMI.addActionListener(this);

// create edit menu JMenu editMenu = new JMenu("Edit"); menubar.add(editMenu); updateMI = editMenu.add(new JMenuItem("Update")); updateMI.addActionListener(this); newEntryMI = editMenu.add(new JMenuItem("New Entry")); newEntryMI.addActionListener(this); deleteMI = editMenu.add(new JMenuItem("Delete")); deleteMI.addActionListener(this); editMenu.addSeparator(); searchMI = editMenu.add(new JMenuItem("Search")); searchMI.addActionListener(this); sortMI = editMenu.add(new JMenuItem("Sort")); sortMI.addActionListener(this);

// create phone list and controls JPanel listPanel = new JPanel(new BorderLayout()); add(listPanel, BorderLayout.CENTER); JLabel label = new JLabel("Name List", JLabel.LEFT); listPanel.add(label, BorderLayout.NORTH);

listView = new JList(nameList); listView.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); listView.addListSelectionListener(this); JScrollPane listScroller = new JScrollPane(listView); listPanel.add(listScroller, BorderLayout.CENTER); JPanel panel = new JPanel(new BorderLayout()); add(panel, BorderLayout.WEST); JPanel editPanel = new JPanel(new GridLayout(6, 1)); panel.add(editPanel, BorderLayout.NORTH); label = new JLabel("Last Name", Label.LEFT); editPanel.add(label); lastName = new JTextField(); editPanel.add(lastName); label = new JLabel("First Name", Label.LEFT); editPanel.add(label); firstName = new JTextField(); editPanel.add(firstName); label = new JLabel("Phone Number", Label.LEFT); editPanel.add(label); phoneNumber = new JTextField(); editPanel.add(phoneNumber);

}

// implementing ActionListener

public void actionPerformed(ActionEvent event) {

Object source = event.getSource();

if (source == newMI) {

nameList.clear();

numberList.clear();

currentFile = null;

display(-1);

setTitle("Phone Contacts"); // reset frame title

} else if (source == openMI) {

doOpen();

} else if (source == exitMI) {

System.exit(0);

} else if (source == updateMI) {

int index = listView.getSelectedIndex();

String name = lastName.getText().trim() + " " + firstName.getText().trim();

String number = phoneNumber.getText().trim();

if (index < 0) { // add a new entry

nameList.addElement(name);

numberList.addElement(number);

index = nameList.getSize() - 1;

} else { // update an existing entry

nameList.set(index, name);

numberList.set(index, number);

}

listView.setSelectedIndex(index);

listView.ensureIndexIsVisible(index);

} else if (source == newEntryMI) {

listView.clearSelection();

display(-1);

} else if (source == deleteMI) {

int index = listView.getSelectedIndex();

nameList.remove(index);

listView.setSelectedIndex(index);

listView.ensureIndexIsVisible(index);

}

else if (source == searchMI) {

String searchName = JOptionPane.showInputDialog(this, "Please enter a name (last first) to search:");

int index = -1;

for (int i = 0; i < nameList.size(); i++) {

if (nameList.get(i).equalsIgnoreCase(searchName)) {

index = i;

}

}

if (index == -1) {

JOptionPane.showMessageDialog(this, "Name " + searchName + " does not exist in the list");

} else {

String name = nameList.elementAt(index);

int space = name.indexOf((int) ' ');

lastName.setText(name.substring(0, space));

firstName.setText(name.substring(space + 1));

phoneNumber.setText(numberList.elementAt(index));

listView.setSelectedIndex(index);

listView.ensureIndexIsVisible(index);

}

}

else if (source == sortMI) {

// created new arrayLlist to store the sorted elements

ArrayList sortList = new ArrayList();

for (int i = 0; i < nameList.size(); i++) {

sortList.add(nameList.getElementAt(i));

}

/* Sort statement*/ Collections.sort(nameList);

// Removed all the items from name list

nameList.removeAllElements();

// iterate through sorted list and assigned to it

for (String name : sortList) {

nameList.addElement(name);

}

listView.setSelectedIndex(0);

listView.ensureIndexIsVisible(0);

}

}

/** * Implementing ListSelectionListener to display the selected entry */

public void valueChanged(ListSelectionEvent e) {

display(listView.getSelectedIndex());

}

/** * method to specify and open a file */

private void doOpen() {

// display file selection dialog

JFileChooser fChooser = new JFileChooser(new File("."));

if (fChooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {

// Get the file name chosen by the user

currentFile = fChooser.getSelectedFile();

} else { // If user canceled file selection, return without doing

// anything.

return;

}

// Try to create a file reader from the chosen file.

FileReader reader;

try {

reader = new FileReader(currentFile);

} catch (FileNotFoundException ex) {

JOptionPane.showMessageDialog(this, "File Not Found: " + currentFile.getPath(), "Error",

JOptionPane.ERROR_MESSAGE);

doOpen();

return;

}

BufferedReader bReader = new BufferedReader(reader);

// remove items from before if any

nameList.clear();

numberList.clear();

// Try to read from the input file one line at a time.

try {

int index;

String name, number;

String textLine = bReader.readLine();

while (textLine != null) {

index = textLine.indexOf((int) ',');

if (index > 0) {

name = textLine.substring(0, index);

number = textLine.substring(index + 1);

nameList.addElement(name.trim());

numberList.addElement(number.trim());

}

textLine = bReader.readLine();

}

bReader.close();

reader.close();

} catch (IOException ioe) {

JOptionPane.showMessageDialog(this, "Error reading file: " + ioe.toString(), "Error",

JOptionPane.ERROR_MESSAGE);

return;

}

setTitle("Phone Contacts: " + currentFile.getPath()); // reset frame

//Title listView.setSelectedIndex(0); display(0);

}

/** * method to display the current entry * */

private void display(int index) { if (index < 0) { lastName.setText(""); firstName.setText(""); phoneNumber.setText("");

} else {

String name = nameList.elementAt(index); int space = name.indexOf((int) ' '); lastName.setText(name.substring(0, space)); firstName.setText(name.substring(space + 1)); phoneNumber.setText(numberList.elementAt(index));

} }

/** * the main method */

public static void main(String[] argv) {

// create frame

ContactList jframe = new ContactList();

Dimension size = Toolkit.getDefaultToolkit().getScreenSize();

jframe.setSize(size.width / 2, size.height - 150);

jframe.setLocation(100, 100);

// set to terminate application on window closing

jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// show the frame

jframe.setVisible(true);

}

}