Updating a JTable when using an AbstractTableModel

Question

Hi,
I have tried to create a JTable with an AbstractTableModel but I am obviously missing something in all the tutorials and examples as I cannot get the table to update when using my model.
My application reads data in from a CSV file that is selectable at run time, but I have written a small app that demonstrates the problem I am having.
If you uncomment the DefaultTableModel lines of code all is OK, but I need to use my Abstract Class as I intend to colour certain rows and add a Boolean column, that I would like to display as a CheckBox and not just the String representation.
Any help would be great as I am tearing my hair out here!!
My Test Class
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import java.util.*;
public class TestTable extends JFrame implements ActionListener
private JPanel jpTestTable = new JPanel();          
private Vector vColumnNames = new Vector();
private Vector vCellValues = new Vector();
private DefaultTableModel dtmTestTable;
private CustomTableModel ctmTestTable;
private JTable jtTestTable;
private JScrollPane jspTestTable;
private JButton jbGo = new JButton();
     public TestTable()
     dtmTestTable = new DefaultTableModel();
     ctmTestTable = new CustomTableModel();
     //jtTestTable = new JTable( dtmTestTable );  //using this instead of my CustomModel works fine
     jtTestTable = new JTable( ctmTestTable );
     jtTestTable.setAutoCreateRowSorter(true);
     jtTestTable.setFillsViewportHeight( true );
     jspTestTable = new JScrollPane( jtTestTable, JScrollPane.VERTICAL_SCROLLBAR_ALWAYS ,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER );
     jspTestTable.setBounds( 10, 10, 350, 400 );
     jspTestTable.setBorder( BorderFactory.createLoweredBevelBorder() );
     jbGo.setText( "Go" );
     jbGo.setBorder( BorderFactory.createRaisedBevelBorder() );
     jbGo.setBounds( 125, 430, 100, 25 );
     jbGo.addActionListener(this);
     jpTestTable.setLayout( null );
     jpTestTable.setBounds( 0, 0, 375, 500 );     
     jpTestTable.add( jspTestTable );
     jpTestTable.add( jbGo );
     this.setTitle( "Test Table" );
     this.getContentPane().setLayout( null );
     this.setBounds( 200, 50, 375, 500 );
     this.getContentPane().add( jpTestTable );
     this.setResizable( false );
     public void actionPerformed( ActionEvent e )
     updateTable();
     public void updateTable()
     vColumnNames.add( "Please" );
     vColumnNames.add( "work" );
     vColumnNames.add( "you" );
     vColumnNames.add( "git!" );
     vColumnNames.trimToSize();
     Vector vRow = new Vector();
          for( int i = 0; i < 10; i++ )
               for( int x = 0; x < vColumnNames.size(); x++ )
                    vRow.add( "" + i + "" + x );
          vCellValues.add( vRow );
     //dtmTestTable.setDataVector( vCellValues, vColumnNames );  //using this instead of my CustomModel works fine
     ctmTestTable.setDataVector( vCellValues, vColumnNames );
     public void processWindowEvent(WindowEvent e)
     super.processWindowEvent(e);
          if(e.getID() == WindowEvent.WINDOW_CLOSING)
          exit();
     public void exit()
     System.exit( 0 );     
     public static void main(String args[])
     TestTable tt = new TestTable();
     tt.setVisible( true );
}And my CustomTableModel Class
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
import java.util.*;
public class CustomTableModel extends AbstractTableModel
protected Vector columnIdentifiers  = new Vector();
protected Vector dataVector = new Vector();
     public CustomTableModel()
     public CustomTableModel( Vector data, Vector columnNames )
     setDataVector( data, columnNames );
     public int getColumnCount()
     return columnIdentifiers.size();
     public int getRowCount()
     return dataVector.size();
     public String getColumnName( int col )
     return "" + columnIdentifiers.get( col );
     public Object getValueAt( int row, int col )
     Vector vRow = new Vector();
     vRow = (Vector) dataVector.get( row );
     return (Object) vRow.get( col );
     public Class getColumnClass(int c)
     return getValueAt(0, c).getClass();
     public boolean isCellEditable(int row, int col)
          if (col < 2)
               return false;
          else
               return true;
     public void setValueAt( Object value, int row, int col )
     Vector vTemp = (Vector) dataVector.get( row );
     Vector<Object> vRow = new Vector<Object>();
          for( int i = 0; i < vTemp.size(); i++ )
               vRow.add( (Object) vTemp.get( i ) );
     vRow.remove( col );
     vRow.add( col, value );
     vRow.trimToSize();     
     dataVector.remove( row );
     dataVector.add( row, vRow );
     dataVector.trimToSize();
     fireTableCellUpdated(row, col);
     public void setDataVector( Vector data, Vector columnNames )
     columnIdentifiers  = (Vector) columnNames.clone();
     dataVector = (Vector) data.clone();
     fireTableDataChanged();
}I have just tried adding the following code after reading another example, but same result - arrrrrrrgggggggghhhhhhhhh!!!!
ctmTestTable = (CustomTableModel) jtTestTable.getModel();
ctmTestTable.fireTableDataChanged();Edited by: Mr_Bump180 on Jul 28, 2008 2:51 PM

Answer 1

Hi camickr,
Well that is good news as my Abstact class is about as much good as an ashtray on a motorbike. I think I must have misread or misunderstood the Table Tutorials as I thought I had to use an Abstrat class to get colurs based on conditions and to get Check Boxes to represent Boolean variables.
I am clearly struggling with this concept - which I have never used before - do you know of any tutorials, that explain how to update a JTable with file data at runtime, as all the ones I have looked at set it as part of the java code - which is no good to me.
Also am I overriding the DefaultTableModel Class correctly - I have written a seperate Model class but wounder if I need to include it in with my JTable class. I was trying to make it generic so I didn't have to write one for each JTable - but as I can't get it to work I should perhaps try to walk before I run.
I'm not asking for the code, but just a guide to how close I am to where I want to be, and some links to tutorials that are closer to what I want to achieve. I will reread the Java Table Tutorial tonight - and you never know the penny may drop all on it's own this time!!!
Thanks