Remove from Main Window

Question

Hi all,
I'm having some trouble removing text from labels in my main window.
I have a main window which has a JMenuBar. On the MenuBar I have a options > file> Remove Menu Item.
When I select the Remove Menu Item, a Remove Dialog opens up with a JList and a Remove button.
The JList is populated by a column (queueName) from my table "testtable".
When I select a particular entry from the Jlist and click "Remove" the entry is removed from the list and my database but not from my main window.
How can i go about removing entry from my main window??
Here is the necessary code:
public class MainWindowClass extends JFrame implements ActionListener {   
    private JPanel prodEastPanel;
    private JPanel prodPanel;
    private JPanel prodWestPanel;
    private JMenuBar menuBar = null;
    private JMenu fileMenu,  optionsMenu = null;
    private JMenuItem exitMI,  removeMI = null;
    JLabel[] prdLabelArray = new JLabel[12];
    ArrayList rec = new ArrayList();
    DBConnection dbc = new DBConnection();
    public MainWindowClass() {
        initComponents();
    private void initComponents() {
        prodPanel = new JPanel();
        prodWestPanel = new JPanel();
        prodEastPanel = new JPanel();
        for (int i = 0; i < prdLabelArray.length; i++) {
            prdLabelArray[i] = new JLabel("");
        menuBar = new JMenuBar();
        fileMenu = new JMenu("File");
        optionsMenu = new JMenu("Options");
        removeMI = new JMenuItem("Remove");
        removeMI.addActionListener(this);
        exitMI = new JMenuItem("Exit");
        exitMI.addActionListener(this);
        fileMenu.add(optionsMenu);
        optionsMenu.add(removeMI);
        fileMenu.add(exitMI);
        menuBar.add(fileMenu);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        getContentPane().setLayout(new GridLayout(1, 0));
        prodPanel.setBackground(new Color(255, 255, 255));
        prodPanel.setLayout(new GridLayout(0, 2));
        prodWestPanel.setBackground(new Color(255, 255, 255));
        prodWestPanel.setLayout(new GridLayout(6, 0));
        prodPanel.add(prodWestPanel);
        prodEastPanel.setBackground(new Color(255, 255, 255));
        prodEastPanel.setLayout(new GridLayout(6, 0));
        prodPanel.add(prodEastPanel);
        getContentPane().add(prodPanel);
        for (int l = 0; l < prdLabelArray.length; l++) {
            if (l % 2 == 0) {
                prodWestPanel.add(prdLabelArray[l]);
                prdLabelArray[l].setHorizontalTextPosition(SwingConstants.LEFT);
            } else {
                prodEastPanel.add(prdLabelArray[l]);
                prdLabelArray[l].setHorizontalTextPosition(SwingConstants.RIGHT);
        dbc.startConnection();
        rec = dbc.selectData();
        Iterator it = rec.iterator();
        while (it.hasNext()) {
            Store_DB_Data sd = (Store_DB_Data) it.next();
            if (sd.getQDescription().equals("PROD")) {
                for (int i = 0; i < prdLabelArray.length; i++) {
                    if (prdLabelArray.getText() == "") {
prdLabelArray[i].setText(sd.getQName().toUpperCase());
break;
dbc.closeSelect();
setJMenuBar(menuBar);
setTitle("Monitor");
setSize(900, 500);
MainWindowCloser brkWindowCloser = new MainWindowCloser();
this.addWindowListener(brkWindowCloser);
setVisible(true);
pack();
public MainWindowClass(String st, String st2) {
initComponents();
public void actionPerformed(ActionEvent ae) {
Object source = ae.getSource();
if (source == exitMI) {
System.exit(0);
if (source == removeMI) {
new RemoveLabel();
class MainWindowCloser extends WindowAdapter {
public void windowClosing(WindowEvent we) {
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MainWindowClass().setVisible(true);

Answer 1

import java.io.Serializable;
public class Store_DB_Data implements Serializable {
    private String qName;
    private String qDescription;
    public Store_DB_Data(String qName, String qDescription) {
        this.qName = qName;
        this.qDescription = qDescription;
    public String getQName() {
        return qName;
    public String getQDescription() {
        return qDescription;
    public void setQName(String quName) {
        qName = quName;
    public void setQDescription(String quDescription) {
        qDescription = quDescription;
public class DBConnection {
    private Connection conn = null;
    private Statement stat = null;
    private ResultSet rs = null;
    public static String queueName;
    public static String description;
    public void startConnection() {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            System.out.println("Registered Driver");
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();           
        try {
            String userID = "";
            String psw = "";
            String url;
            url = "jdbc:mysql://localhost:3306/mqnames";
            conn = DriverManager.getConnection(url, userID, psw);
            stat = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
                    ResultSet.CONCUR_READ_ONLY);
        } catch (SQLException ex) {
            ex.printStackTrace();
    public ArrayList selectData() {
        ArrayList data = new ArrayList();
        try {
            String selectData = "SELECT queueName, description FROM testtable";
            rs = stat.executeQuery(selectData);
            while (rs.next()) {
                queueName = rs.getString("queueName");
                description = rs.getString("description");
                data.add(new Store_DB_Data(queueName, description));
        } catch (SQLException e) {
            e.printStackTrace();
        return data;
    public void closeSelect() {
        try {
            rs.close();
            stat.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
    public void deleteData(String removeName) {
        try {
            System.out.println("qName: " + removeName);
            stat = conn.createStatement();
            String deleteData = "DELETE FROM testtable WHERE queueName ='" + removeName + "'";
            int deleteCount = stat.executeUpdate(deleteData);           
            stat.close();
            conn.close();
            System.out.println("Connection for delete is closed");
        } catch (SQLException e) {
            e.printStackTrace();
    public ArrayList removeList() {
        ArrayList rData = new ArrayList();
        String names = new String();
        try {
            rs = stat.executeQuery("SELECT queueName FROM testtable");
            while (rs.next()) {
                names = rs.getString("queueName");
                System.out.println("rs: " + names);
                rData.add(new RemoveData(names));
            rs.close();
        } catch (SQLException e) {
        return rData;
}