Columns for JTable do not display

[Jerry McClain]

I have a JTable within my application and utilizing a class that extends AbstractTableModel to display the columns and data. However, the columns are not being displayed. I simply created a array of Strings and passed that array to getColumnName method do display the columns. But it is not working. Do I need to implment an instance of TableColumnModel as well? If not, any ideas on what can be wrong ? Thanks
Here's the relevant code:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
import java.util.*;
public class VerbTableModel extends AbstractTableModel {
final String[] columnNames = {"Present", "Present Subjunctive", "Future", "Conditional", "Preterite", "Imperfect"};
String[][] cellData = new String[columnNames.length][6];
public boolean isCellEditable(int row, int col){
return false;
}
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return cellData.length;
}
public String getColumnName(int col) {
return columnNames[col];
}
}
This code goes into my class where I display the GUI and where the table exists:
JPanel tablePanel = new JPanel();
tablePanel.setLayout(new FlowLayout());
tm = new VerbTableModel();
JTable verbTable = new JTable(tm);
tablePanel.add(verbTable);

[saager mhatre]

In order to get your data to display you must implement the public Object getValueAt(int row, int column); method in order to tell the table what to render in each cell.
About your column names... Ideally you would create an instance of javax.swing.table.JTableHeader and place it in a North Border of the JTable. As a quick implementation, yuo can add your JTable in a javax.swing.JScrollPane whose default implementation is designed to handles JTables suitably.
So your VerbTableModel would contain the following method...

public Object getValueAt(int row, intcol){
return cellData[row][col]
}

...and you would add your JTable to the JPanel as so.

tablePanel.add(new JSCrollPane(verbTable))

THE JDK API also suggests the same treatment!

[ July 29, 2002: Message edited by: saager mhatre ]

[Jerry McClain]

Thanks Saager. Adding the JScrollPane did the trick. Columns now appear. Can you send me the link of the Java API that talks about adding a scrollpane will cause the columns to appear, if u have it.
Also, I had the getValueAt method, but it seems like I forgot to paste it up there.