I need to know how to do the following:
Allow for editing
and
Allow for searching by state or by any other options
This is what I have so far:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
public class AddressBook extends JFrame {
// Specify the size of five string fields in the record
final static int NAME_SIZE = 32;
final static int STREET_SIZE = 32;
final static int CITY_SIZE = 20;
final static int STATE_SIZE = 2;
final static int ZIP_SIZE = 5;
// added record number
final static int RECORDNUM_SIZE = 5;
final static int RECORD_SIZE =
(NAME_SIZE + STREET_SIZE + CITY_SIZE + STATE_SIZE + RECORDNUM_SIZE + ZIP_SIZE);
// Access address.dat using RandomAccessFile
private RandomAccessFile raf;
// Text fields
private JTextField jtfName = new JTextField(NAME_SIZE);
private JTextField jtfStreet = new JTextField(STREET_SIZE);
private JTextField jtfCity = new JTextField(CITY_SIZE);
private JTextField jtfState = new JTextField(ZIP_SIZE);
private JTextField jtfZip = new JTextField(ZIP_SIZE);
private JTextField jtfRecordNum = new JTextField(RECORDNUM_SIZE);
// Buttons
private JButton jbtAdd = new JButton("Add");
private JButton jbtFirst = new JButton("First");
private JButton jbtNext = new JButton("Next");
private JButton jbtPrevious = new JButton("Previous");
private JButton jbtLast = new JButton("Last");
//edit button added
private JButton jbtEdit = new JButton("Edit");
public AddressBook() {
// Open or create a random access file
try {
raf = new RandomAccessFile("address.dat", "rw");
}
catch(IOException ex) {
System.out.print("Error: " + ex);
System.exit(0);
}
// Panel p1 for holding labels Name, Street, and City
JPanel p1 = new JPanel();
p1.setLayout(new GridLayout(5, 1));
p1.add(new JLabel("Name"));
p1.add(new JLabel("Street"));
p1.add(new JLabel("City"));
// Record Number Label Holder
p1.add(new JLabel("Record Number"));
p1.add(new JLabel("Search: "));
// Panel jpState for holding state
JPanel jpState = new JPanel();
jpState.setLayout(new BorderLayout());
jpState.add(new JLabel("State"), BorderLayout.WEST);
jpState.add(jtfState, BorderLayout.CENTER);
// Panel jpZip for holding zip
JPanel jpZip = new JPanel();
jpZip.setLayout(new BorderLayout());
jpZip.add(new JLabel("Zip"), BorderLayout.WEST);
jpZip.add(jtfZip, BorderLayout.CENTER);
// Panel p2 for holding jpState and jpZip
JPanel p2 = new JPanel();
p2.setLayout(new BorderLayout());
p2.add(jpState, BorderLayout.WEST);
p2.add(jpZip, BorderLayout.CENTER);
// Panel p3 for holding jtfCity and p2
JPanel p3 = new JPanel();
p3.setLayout(new BorderLayout());
p3.add(jtfCity, BorderLayout.CENTER);
p3.add(p2, BorderLayout.EAST);
// Panel p4 for holding jtfName, jtfStreet, and p3
JPanel p4 = new JPanel();
p4.setLayout(new GridLayout(3, 1));
p4.add(jtfName);
p4.add(jtfStreet);
p4.add(p3);
// Place p1 and p4 into jpAddress
JPanel jpAddress = new JPanel(new BorderLayout());
jpAddress.add(p1, BorderLayout.WEST);
jpAddress.add(p4, BorderLayout.CENTER);
// Set the panel with line border
jpAddress.setBorder(new BevelBorder(BevelBorder.RAISED));
// Add buttons to a panel
JPanel jpButton = new JPanel();
jpButton.add(jbtAdd);
jpButton.add(jbtFirst);
jpButton.add(jbtNext);
jpButton.add(jbtPrevious);
jpButton.add(jbtLast);
// added
jpButton.add(jbtEdit);
// Add jpAddress and jpButton to the frame
add(jpAddress, BorderLayout.CENTER);
add(jpButton, BorderLayout.SOUTH);
jbtAdd.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String s;
s = jtfName.getText();
if (s.length() != 0) {
writeAddress();
jtfName.setText("");
jtfStreet.setText("");
jtfCity.setText("");
jtfState.setText("");
jtfZip.setText("");
//added
jtfRecordNum.setText("");
}
}
});
jbtFirst.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
if (raf.length() > 0) readAddress(0);
}
catch (IOException ex) {
ex.printStackTrace();
}
}
});
jbtNext.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
long currentPosition = raf.getFilePointer();
if (currentPosition < raf.length())
readAddress(currentPosition);
}
catch (IOException ex) {
ex.printStackTrace();
}
}
});
jbtPrevious.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
long currentPosition = raf.getFilePointer();
if (currentPosition - 2 * RECORD_SIZE > 0)
// Why 2 * 2 * RECORD_SIZE? See the follow-up remarks
readAddress(currentPosition - 2 * 2 * RECORD_SIZE);
else
readAddress(0);
}
catch (IOException ex) {
ex.printStackTrace();
}
}
});
jbtLast.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
long lastPosition = raf.length();
if (lastPosition > 0)
// Why 2 * RECORD_SIZE? See the follow-up remarks
readAddress(lastPosition - 2 * RECORD_SIZE);
}
catch (IOException ex) {
ex.printStackTrace();
}
}
});
// Display the first record if exists
try {
if (raf.length() > 0) readAddress(0);
}
catch (IOException ex) {
ex.printStackTrace();
}
}
/** Write a record at the end of the file */
public void writeAddress() {
try {
raf.seek(raf.length());
FixedLengthStringIO.writeFixedLengthString(
jtfName.getText(), NAME_SIZE, raf);
FixedLengthStringIO.writeFixedLengthString(
jtfStreet.getText(), STREET_SIZE, raf);
FixedLengthStringIO.writeFixedLengthString(
jtfCity.getText(), CITY_SIZE, raf);
FixedLengthStringIO.writeFixedLengthString(
jtfState.getText(), STATE_SIZE, raf);
FixedLengthStringIO.writeFixedLengthString(
jtfZip.getText(), ZIP_SIZE, raf);
//added
FixedLengthStringIO.writeFixedLengthString(
jtfZip.getText(), RECORDNUM_SIZE, raf);
}
catch (IOException ex) {
ex.printStackTrace();
}
}
/** Read a record at the specified position */
public void readAddress(long position) throws IOException {
raf.seek(position);
String name = FixedLengthStringIO.readFixedLengthString(
NAME_SIZE, raf);
String street = FixedLengthStringIO.readFixedLengthString(
STREET_SIZE, raf);
String city = FixedLengthStringIO.readFixedLengthString(
CITY_SIZE, raf);
String state = FixedLengthStringIO.readFixedLengthString(
STATE_SIZE, raf);
String zip = FixedLengthStringIO.readFixedLengthString(
ZIP_SIZE, raf);
jtfName.setText(name);
jtfStreet.setText(street);
jtfCity.setText(city);
jtfState.setText(state);
jtfZip.setText(zip);
}
public static void main(String[] args) {
AddressBook frame = new AddressBook();
frame.pack();
frame.setTitle("AddressBook");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}