Hi, I am having problems with a program i am making the program coding is
The problems i am having with areCode:import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.util.ArrayList;
import java.util.List;
public class Contacts implements ActionListener {
JFrame contactsFrame;
JPanel contactsPanel;
JTextField name, lname, phonenum;
JLabel names, lnames, phonenums;
JButton next, back, add, edit, save;
List data = new ArrayList();
int a=0, b=0;
public Contacts() {
//Create and set up the window.
contactsFrame = new JFrame("Contacts Manager Program");
contactsFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
contactsFrame.setSize(3020, 40);
//Create and set up the panel.
contactsPanel = new JPanel(new GridLayout(5, 2));
//Add the widgets.
addWidgets();
//Add the panel to the window.
contactsFrame.getContentPane().add(contactsPanel, BorderLayout.CENTER);
//Display the window.
contactsFrame.pack();
contactsFrame.setVisible(true);
}
private void addWidgets() {
//Create widgets.
name = new JTextField(data.get(0));
lname = new JTextField(data.get(1));
phonenum = new JTextField(data.get(2));
names = new JLabel("Name:");
lnames = new JLabel("Last Name:");
phonenums = new JLabel("Phone Number:");
next = new JButton("Next");
back = new JButton("Back");
add = new JButton("Add new Contact");
edit = new JButton("Save Changes");
//Listen to events from the Convert button.
next.addActionListener(this);
back.addActionListener(this);
add.addActionListener(this);
//Add the widgets to the container.
contactsPanel.add(names);
contactsPanel.add(name);
contactsPanel.add(lnames);
contactsPanel.add(lname);
contactsPanel.add(phonenums);
contactsPanel.add(phonenum);
contactsPanel.add(back);
contactsPanel.add(next);
contactsPanel.add(add);
contactsPanel.add(edit);
}
public void actionPerformed(ActionEvent event) {
if(event.getSource()==add) {
data.add(name.getText());
data.add(lname.getText());
data.add(phonenum.getText());
b=b+3;
}
if(event.getSource()==next) {
if (a!=b) {
a=a+3;
}
name.setText(data.get(a));
lname.setText(data.get(a+1));
phonenum.setText(data.get(a+2));
}
if(event.getSource()==back) {
if(a!=0){
a=a-3;
}
name.setText(data.get(a));
lname.setText(data.get(a+1));
phonenum.setText(data.get(a+2));
}
//if(event.getSource()==edit) {
//data[a]=name.getText();
//data[a+1]=lname.getText();
//data[a+2]=phonenum.getText();
//data2[a]=name.getText();
//data2[a+1]=lname.getText();
//data2[a+2]=phonenum.getText();
//}
}
private static void createAndShowGUI() {
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);
Contacts converter = new Contacts();
}
public void main(String[] args)
throws Exception
{
//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
read();
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
public void write()
throws Exception
{
}
public void read()
throws Exception
{
data = new ArrayList();
BufferedReader reader= new BufferedReader(new FileReader("foo.txt"));
String textline = null;
while((textline = reader.readLine()) != null){
data.add(textline);
b++;
}
reader.close();
}
}
Thanks.Code:E:\Contacts.java:39: cannot resolve symbol
symbol : constructor JTextField (java.lang.Object)
location: class javax.swing.JTextField
name = new JTextField(data.get(0));
^
E:\Contacts.java:40: cannot resolve symbol
symbol : constructor JTextField (java.lang.Object)
location: class javax.swing.JTextField
lname = new JTextField(data.get(1));
^
E:\Contacts.java:41: cannot resolve symbol
symbol : constructor JTextField (java.lang.Object)
location: class javax.swing.JTextField
phonenum = new JTextField(data.get(2));
^
E:\Contacts.java:80: setText(java.lang.String) in javax.swing.text.JTextComponent cannot be applied to (java.lang.Object)
name.setText(data.get(a));
^
E:\Contacts.java:81: setText(java.lang.String) in javax.swing.text.JTextComponent cannot be applied to (java.lang.Object)
lname.setText(data.get(a+1));
^
E:\Contacts.java:82: setText(java.lang.String) in javax.swing.text.JTextComponent cannot be applied to (java.lang.Object)
phonenum.setText(data.get(a+2));
^
E:\Contacts.java:88: setText(java.lang.String) in javax.swing.text.JTextComponent cannot be applied to (java.lang.Object)
name.setText(data.get(a));
^
E:\Contacts.java:89: setText(java.lang.String) in javax.swing.text.JTextComponent cannot be applied to (java.lang.Object)
lname.setText(data.get(a+1));
^
E:\Contacts.java:90: setText(java.lang.String) in javax.swing.text.JTextComponent cannot be applied to (java.lang.Object)
phonenum.setText(data.get(a+2));
^
