Java Programming

I've found a few example and posts online about this topic and I know there's something in the conversion that I'm doing wrong. I want to take three string constants assign them to a Vector and then place the value in the rows of a table I have created. Below is my AbstractTableModel class and Table class

class FreeRunTableFrame extends JInternalFrame {
// private static final String TITLE =
//private SnapShotFormat frsnf;
private SymbolTableModel frTableModel;
private JTable frTable = new JTable();
private JMenuItem menuItem;
public FreeRunTableFrame(JScrollPane parent) {
frTable.setBounds(0, 0, 200, 380);
parent.setViewportView(frTable);
getContentPane().add(tablePanel(), "Center");
}

private JPanel tablePanel() {
JPanel panel = new JPanel(new BorderLayout());
panel.setBorder(new EmptyBorder(10, 10, 10, 10));

frTable.setRowSelectionAllowed(false);

frTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
JScrollPane scrollPane = new JScrollPane(frTable);
panel.add(scrollPane, BorderLayout.CENTER);

return (panel);
}

private void SetupSymbolFilterTitleBar() {
Vector titleData = new Vector(3, 3);
Vector rowData = new Vector (totalNumSymbols, 3);
String[] title_string = new String[3];
String[] row_string = new String[totalNumSymbols];
title_string[0] = "ID";
title_string[1] = "Symbol";
title_string[2] = "Value";
final String num_const = "0";
final String symbol_const = "1";
final String val_const = "2";
for (int i = 0; i < 3; i++) {
titleData.add(title_string);
}
System.out.println("Total Num Symbols : " + totalNumSymbols + "\n");
MessageFormat msgformat = new MessageFormat ("%s");
msgformat.applyPattern(num_const);
msgformat.applyPattern(symbol_const);
msgformat.applyPattern(val_const);
for (int i = 0; i < totalNumSymbols; i++)
{

row_string[i] = num_const.toString();
row_string[i] = symbol_const.toString();
row_string[i] = val_const.toString();
rowData.add(row_string[i]);
}
titleData.trimToSize();
rowData.trimToSize();
frTableModel = new SymbolTableModel(titleData, rowData);
frTable.setModel(frTableModel);
TableColumn column = null;
for (int i = 0; i < frTable.getColumnCount(); i++) {
column = frTable.getColumnModel().getColumn(i);
column.setMinWidth(60);
column.setResizable(true);
}
}

private void AddSymbol(int number, String symbol, String value) {
String[] row_string = new String[3];
row_string[0] = String.valueOf(number);
row_string[1] = symbol;
row_string[2] = value;
if (number <= totalNumSymbols)
{
//frTable.setModel(frTableModel);
//frTable.setValueAt(row_string[0], number, 0);
//frTable.setValueAt(row_string[1], number, 1);
//frTable.setValueAt(row_string[2], number, 2);
}
}
}

class SymbolTableModel extends AbstractTableModel {
private String[] colNames;
private String[][] rowData;
private int rowCount = 0;
public frTableCellRenderer cell_ren = new frTableCellRenderer();
public SymbolTableModel(Vector header, Vector data) {
colNames = new String[header.size()];
for (int i = 0; i < colNames.length; i++) {
colNames[i] = (String) header.get(i);
}
rowCount = data.size();
System.out.println("RowCount: " + rowCount + "\n");
//String [][] tmp_str = new String[totalNumSymbols][3];
Object [][] data_obj = (Object[][])data.toArray();
for (int i = 0; i < rowCount; i++)
{
for (int x = 0; x < 3; x++)
{
System.out.println("ARRAY: " + data_obj[i][x].toString() + "\n");

}

}
rowData = new String[rowCount][colNames.length];
System.out.println("Before for loop \n");
for (int i = 0; i < rowCount; i++)
{
for (int x = 0; x < 3; x++)
{
//System.out.println("data: " + tmp_str[i][x] + "\n");
//rowData[i][x] = data.get(i).toString();
}

}
}

public int getRowCount() {
return (rowCount);
}

public void setRowCount() {
}

public int getColumnCount() {
return (colNames.length);
}

public Object getValueAt(int row, int column) {
return (rowData[row]);
}

public String getColumnName(int column) {
return (colNames[column]);
}

public void setValueAt(String data, int row, int column) {
System.out.println("In SymbolTableModel's setValueAt\n");
//cell_ren.setValue(data);
//rowData[row][column] = data;
}
public boolean isCellEditable(int row, int col)
{
return true;
}
public Class getColumnClass(int column)
{
return String.class;
}
} // end of SymbolTableModel class

Any help would greatly be appreciated!

Thanks!