Problem updating JTextField

Question

Hi,
I have written a program with a main class and two instances of an inner class. The main class extends JFrame and is the container that holds six JTextFields. In the main class is a JButton called "testme". When the user clicks on the "testme" button I want to update the JTextFields. My problem is that I am confused about where the event handling should take place. Is it proper to keep the "testme" button in the main class and update the panels in the inner class or do I need to have all of the event handling at the inner class level? I really want to understand the conceptual issues as well as the code.
Thanks,
Steve
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class TestButton extends JFrame implements ActionListener {     AddButtons leftPanel, rightPanel;
     JTextArea msgout;
     JButton buttonTest;
     TestButton() {
          super("This is a JFrame");
                setSize(500, 200);  // width, height
                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);     
              JPanel pane = new JPanel();     // create empty space          pane.setBorder(BorderFactory.createEmptyBorder(30, 30, 10, 30));
          JButton buttonTest = new JButton("TestMe");     
             buttonTest.addActionListener(this);
          msgout = new JTextArea( 8, 40 ); // instance TextArea
                String[] leftlabels = {"left1", "left2", "left3"};          leftPanel = new AddButtons(this, leftlabels);     
             String[] rightlabels = {"right1", "right2", "right3"};          rightPanel = new AddButtons(this, rightlabels);          
               GridLayout grid = new GridLayout(1, 3, 5, 15);
                pane.setLayout(grid);
          pane.add(buttonTest);
          pane.add(msgout);
          pane.add(leftPanel);
          pane.add(rightPanel);
          msgout.append("Successful");
          setContentPane(pane);
          setVisible(true);
public void actionPerformed(ActionEvent evt) {     
     String command = evt.getActionCommand();               if (command.equals("TestMe")){                    msgout.append("\nSuccessful");
public static void main(String[] arguments) {
        JFrame frame = new TestButton();
        frame.show();
class AddButtons extends JPanel implements ActionListener {     TestButton frame; // instance variable of class TestButton     JTextField[] setting = new JTextField[3];  // instance variable     private int numClicks = 0;
        AddButtons (TestButton parent, String[] label) {     // 1   parent declared here makes it public
          JLabel textUpdate = new JLabel();
          frame = parent;      // associates the classes
             GridLayout grid = new GridLayout(3, 1, 5, 15);
              setLayout(grid);
          for (int i = 0; i < 3; i++) {
                     setting[i] = new JTextField("0");                       setting.addActionListener(this);               JLabel settingLabel = new JLabel(label[i], JLabel.RIGHT);
               add(settingLabel);
               add(setting[i]);
//This is where I thought I might capture the "testme" event     
public void actionPerformed(ActionEvent evt) {
          String command = evt.getActionCommand();               if (command.equals("TestMe")){
          setting[2].setText("2003");               }          }

Answer 1

This article should help you out:
http://www-106.ibm.com/developerworks/java/library/j-jtable/index.html?dwzone=java