For my programming class, I have to write a Java program that works as an address book. I have created a Contact class with methods such as SetName, getName, etc. and an AddressBook class with an array to store the data. The main class has a GUI with four buttons: Add, Search, Delete, and Update. The Add and Search buttons work, but there is a problem with the Delete button - the program won't compile the code that I've written for it, and I can't see why.
Here is the code (I've removed irrelevant bits):
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class AddressBook1_3 extends JFrame implements ActionListener {
(data members declared here)
AddressBook myBook;
public static void main (String[] args) {
AddressBook1_3 book = new AddressBook1_3();
book.setupArray(20);
book.setVisible(true);
}
public void setupArray(int N){
myBook = new AddressBook(N);
}
public AddressBook1_3() {
Container contentPane;
setSize (FRAME_WIDTH, FRAME_HEIGHT);
setResizable(false);
setTitle("SM Address Book Version 1.3");
setLocation(FRAME_X_LOCATION, FRAME_Y_LOCATION);
(GUI objects are placed in a ContentPane here)
addButton.addActionListener(this);
searchButton.addActionListener(this);
updateButton.addActionListener(this);
deleteButton.addActionListener(this);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent event) {
if(event.getSource() == addButton) {
addContact();
clear();
}
else if(event.getSource() == updateButton) {
updateContact();
clear();
}
else if(event.getSource() == searchButton) {
searchContact();
clear();
}
else if(event.getSource() == deleteButton) {
//deleteContact();
clear();
}
}
public void addContact() {
Contact person = new Contact();
person.SetName(nmefield.getText());
person.SetAddress(adrsfield.getText());
person.SetPhone(phfield.getText());
person.SetEmail(emfield.getText());
myBook.add(person);
}
public void searchContact() {
Contact contact;
contact = myBook.search(JOptionPane.showInputDialog(null, "Enter name to search for"));
if (contact == null) {
JOptionPane.showMessageDialog(null, "Contact not found.");
} else {
/*nmefield.setText(contact.getName());
adrsfield.setText(contact.getAddress());
phfield.setText(contact.getPhone());
emfield.setText(contact.getEmail());*/
JOptionPane.showMessageDialog(null,"Name: " + contact.getName() + "\n" + "Address: " + contact.getAddress() + "\n" + "Phone: " + contact.getPhone() + "\n" + "E-Mail: " + contact.getEmail());
}
}
public void updateContact() {
// Not sure how to do this
JOptionPane.showMessageDialog(null, "Coming Soon!");
}
public void deleteContact() {
Contact contact;
contact = myBook.search(nmefield.getText());
if (contact == null) {
JOptionPane.showMessageDialog(null, "Error: Contact Not Found.");
} else {
boolean success = myBook.delete(contact);
if (success) {
contact = myBook.search(nmefield.getText());
if (contact == null) {
JOptionPane.showMessageDialog(null, "Contact Deleted");
} else {
JOptionPane.showMessageDialog(null, "Error: Contact is still there");
}
} else {
JOptionPane.showMessageDialog(null, "Error: Deletion has a problem");
}
}
}
public void clear() {
nmefield.setText("");
adrsfield.setText("");
phfield.setText("");
emfield.setText("");
}
}
When this code is compiled, the following error message is shown:
AddressBook1_3.java:175: delete(java.lang.String) in AddressBook cannot be applied to (Contact)
boolean success = myBook.delete(contact);
^
What is the problem here?
And about the updateContact method: I know how to get the values from the JTextFields, but how do I change the address, phone or email values without having to create a new contact with the same name but different values? (which comes back to the delete function)
If necessary, I can post the Contact and AddressBook classes as well.
