Accessibility of JComboBox problem

Hi everyone!
I've got two applications. One of them make changes in the components of the other one through the Accessibility API. (Both are running on the same VM)
I make changes without problem in JButton, JTextComponent...
But I've got a JComboBox with 4 options, and the "reader/writer" application has to select the third option, and I can't get a way to do this with Accessibility.
I can see the JComboBox and its internal structure (a Viewport, a BasicPopUp, a JPanel, ScrollButtons, a ComboList, and the four options).
The only available action is in the JComboBox and is the togglePopUp that toggles it without problem.
But I can't get a way to select one of the options of the toggled up pop up.
Does anybody has an example code for doing this?
Thank you a lot!
AC

Works fine for me.
If you need further help then you will need to provide [url http://www.physci.org/codes/sscce.jsp]Simple Demo Code that demonstrates the problem.

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here is the code to reproduce the above exception. Exception thrown when key board arrow keys are used to navigate.
* ComboBoxProblem.java
* Created on June 15, 2006, 12:40 PM
package ComboBox;
* @author prabus
public class ComboBoxProblem extends javax.swing.JFrame {
    /** Creates new form ComboBoxProblem */
    public ComboBoxProblem() {
        initComponents();
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
    private void initComponents() {//GEN-BEGIN:initComponents
        java.awt.GridBagConstraints gridBagConstraints;
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jComboBox1 = new javax.swing.JComboBox();
        jLabel2 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jPanel2 = new javax.swing.JPanel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
        jPanel1.setLayout(new java.awt.GridBagLayout());
        jLabel1.setText("Subjects");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.insets = new java.awt.Insets(10, 10, 10, 0);
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        jPanel1.add(jLabel1, gridBagConstraints);
        jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "All", "New Subject" }));
        jComboBox1.setPreferredSize(new java.awt.Dimension(150, 24));
        jComboBox1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jComboBox1ActionPerformed(evt);
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 1;
        gridBagConstraints.insets = new java.awt.Insets(10, 10, 10, 10);
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        jPanel1.add(jComboBox1, gridBagConstraints);
        jLabel2.setText("Course");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.insets = new java.awt.Insets(10, 10, 0, 0);
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        jPanel1.add(jLabel2, gridBagConstraints);
        jTextField1.setPreferredSize(new java.awt.Dimension(150, 24));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.insets = new java.awt.Insets(10, 10, 0, 10);
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        jPanel1.add(jTextField1, gridBagConstraints);
        getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);
        jPanel2.setBorder(new javax.swing.border.EtchedBorder());
        jButton1.setText("OK");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
        jPanel2.add(jButton1);
        jButton2.setText("Cancel");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
        jPanel2.add(jButton2);
        getContentPane().add(jPanel2, java.awt.BorderLayout.SOUTH);
        pack();
    }//GEN-END:initComponents
    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
        // Add your handling code here:
        System.exit(0);
    }//GEN-LAST:event_jButton2ActionPerformed
    private void jComboBox1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jComboBox1ActionPerformed
        // Add your handling code here:
        if((jComboBox1.getSelectedItem().toString()).equals("New Subject"))
            jComboBox1.updateUI();
            AddSubject add = new AddSubject();
            add.show();
            updateSubjectCombo();
    }//GEN-LAST:event_jComboBox1ActionPerformed
    private String newSubject = null;
    public void setNewSubject(String newsub)
        newSubject = newsub;
    private void updateSubjectCombo()
        javax.swing. DefaultComboBoxModel model = new javax.swing. DefaultComboBoxModel();
        model.addElement("All");
        model.addElement("New Subject");
        model.addElement(newSubject);
        jComboBox1.setModel(model);
        jComboBox1.setSelectedIndex(jComboBox1.getItemCount() - 1);
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        // Add your handling code here:
        System.out.println(" Course : "+jTextField1.getText());
        for(int i = 0; i < jComboBox1.getItemCount(); i++)
            System.out.println(" Subject "+i+ " : " +jComboBox1.getItemAt(i));
    }//GEN-LAST:event_jButton1ActionPerformed
    /** Exit the Application */
    private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
        System.exit(0);
    }//GEN-LAST:event_exitForm
     * @param args the command line arguments
    public static void main(String args[]) {
        new ComboBoxProblem().show();
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JComboBox jComboBox1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration//GEN-END:variables
Another Class
* AddSubject.java
* Created on June 15, 2006, 12:51 PM
package ComboBox;
* @author prabus
public class AddSubject extends javax.swing.JFrame {
    /** Creates new form AddSubject */
    public AddSubject() {
        initComponents();
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
    private void initComponents() {//GEN-BEGIN:initComponents
        java.awt.GridBagConstraints gridBagConstraints;
        jPanel1 = new javax.swing.JPanel();
        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jPanel2 = new javax.swing.JPanel();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
        jPanel1.setLayout(new java.awt.GridBagLayout());
        jLabel1.setText("Subject Name");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.insets = new java.awt.Insets(10, 10, 10, 10);
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        jPanel1.add(jLabel1, gridBagConstraints);
        jTextField1.setPreferredSize(new java.awt.Dimension(150, 24));
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.insets = new java.awt.Insets(10, 10, 10, 10);
        gridBagConstraints.anchor = java.awt.GridBagConstraints.WEST;
        jPanel1.add(jTextField1, gridBagConstraints);
        getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);
        jPanel2.setBorder(new javax.swing.border.EtchedBorder());
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        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
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        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
        jPanel2.add(jButton2);
        getContentPane().add(jPanel2, java.awt.BorderLayout.SOUTH);
        pack();
    }//GEN-END:initComponents
    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton2ActionPerformed
        // Add your handling code here:
        System.exit(0);
    }//GEN-LAST:event_jButton2ActionPerformed
    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        // Add your handling code here :
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        ComboBoxProblem prob = new ComboBoxProblem();
        prob.setNewSubject(newsub);
        System.exit(0);
    }//GEN-LAST:event_jButton1ActionPerformed
    /** Exit the Application */
    private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
        System.exit(0);
    }//GEN-LAST:event_exitForm
     * @param args the command line arguments
    public static void main(String args[]) {
        new AddSubject().show();
    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration//GEN-END:variables
}

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        super.init(config);
        passwordFile = config.getInitParameter("passwordFile");
        System.out.println(passwordFile);
        if (passwordFile == null)
            System.out.println("The \"passwordFile\" property must be set to a file name");
        try
        catch (Exception e)
            System.out.println("Error: Unable to read passwordFile.");
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
    public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
}It was suggested on comp.lang.java.programmer to check the path that the system was thinking I was searching which I did by inserting this code fragment:
     // initialise the servlet and load password(s)
//     super.init(config);
//     passwordFile = config.getInitParameter("passwordFile");
     // added code
     passwordFile = "passwords.txt";
     File f = new File( passwordFile );
     System.out.println( f.getAbsolutePath() );
     // added code.
        ...This lead me to learn that the directory being returned was:
C:Program Files\Apache Group\Tomcat 4.1\passwordFile.txt
Which is strange since I would of thought that the lowest directory
that is visible to the class would of been ROOT (hence it's name).
Does this mean if I copy the passwordFile.txt to the above directory
it would work? Actually no. I still can't get the filename as a
parameter from web.xml which is frustrating. If you could give me any
pointers on what might be wrong then that would be cool.
I thought I could move forward by accessing the file directly. But no: An addition of f.exists() to check that the file exists returns false. I've now got a copy of passwords.txt in every single directory from the classes directory all the way down to C:\ and it still doesn't work.
I hope someone can help out here since this is very frustrating to be stuck on something so basic as file handling.
Graham Reeds,
http://omnieng.co.uk | [email protected]

I can see how this is frustrating but it should be fixable. The last example you posted won't work because you have "passwords.txt" instead of "c:/passwords.txt".
If you're still looking for a solution could you cut and paste the following code into your servlet code and then post the results?
// Check that init param is read correctly
String filename = config.getInitParameter("passwordfile");
System.out.println("config param = " + filename);
// try filenames
String[] filenames = new String[] {"c:/passwords.txt", "c:\\passwords.txt", "passwords.txt"};
for (int i=0; i < filenames.length; ++i) {
   File file = new File(filenames);
System.out.println("File " + filenames[i] + " - exists = " + file.exists());
System.out.println("Abs path = " + file.getAbsolutePath());
This is based on the file c:\passwords.txt existing - if I have the wrong filename, please adjust. Also, you may need to change <i> to [[i]i] in a couple of places.

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