JTable Question

[Nawar Gailani]

Hi,
Can someone help explain to me (or point to a link) about how can I display permanently the values edited in the cells?
I have a table with three columns:
Song, Rel. Year, Lyrics
Song column is just a String.
Rel. Year is Date.
Lyrics is a link to a specified file that contains the lyrics.
As I want the user to edit the values in the table, I wrote TableModel, CellEditor, and CellRenderer. Whatever I tried, the data entered disappeared when I tab (move) to another cell. I tried this in the CellEditor:

public Object getCellEditorValue() {
return new String(getText());
}

I don't know if this is the reason really. So what I should do to make the changes remained when I move to other cells?

Thanks in advance

[Jerret Halter]

Do you mind posting your code so that it I (and anyone else who looks at this post) can see what is going on?

[Nawar Gailani]

Hi Jerret,
This is the TableModel:

 public class AudioMusicalTableModel extends AbstractTableModel {
    
    private String[] columnNames = new 
            String[] {"Musical Piece", "Artist", "Rel. Year", 
            "CD Number", "Description"};
    private int rowCount;
    
    
    
    public AudioMusicalTableModel() {
        rowCount = 1;
    }
 
    
    public int getRowCount() {
        return rowCount;
    }
 
    public int getColumnCount() {
        return columnNames.length;
    }
 
// Maybe i should return a vector of empty strings here?
    public Object getValueAt(int rowIndex, int columnIndex) { 
        return null;
    }
    
    public String getColumnName(int column) {
        return columnNames[column]; 
    }
    
 
    public boolean isCellEditable(int rowIndex, int columnIndex) {
        if (columnIndex == 4) return false; 
        return true;
    }
 
   
}   

and this is the CellEditor:

  public class GeneralEditor extends JTextField implements TableCellEditor { 
    
    protected EventListenerList listenerList = new EventListenerList();
    protected ChangeEvent changeEvent = new ChangeEvent(this);
    
    public GeneralEditor() {
        super();
        addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {
                fireEditingStopped();
            }
        });
    }
 
    public Component getTableCellEditorComponent(JTable table, Object value, 
            boolean isSelected, int row, int column) {
        return this;
    }
 
//Is this right?!
    public Object getCellEditorValue() {
        return new String(getText());
    }
 
    public boolean isCellEditable(EventObject anEvent) {
        return true;
    }
 
    public boolean shouldSelectCell(EventObject anEvent) {
        return true;
    }
 
    public boolean stopCellEditing() {
        fireEditingStopped();
        return true;
    }
 
    public void cancelCellEditing() {
        fireEditingCanceled();
    }
 
    public void addCellEditorListener(CellEditorListener l) { 
        listenerList.add(CellEditorListener.class, l);
    }
 
    public void removeCellEditorListener(CellEditorListener l) {
        listenerList.remove(CellEditorListener.class, l);
    }
    
    protected void fireEditingStopped() {
        CellEditorListener listener;
        Object[] listeners = listenerList.getListenerList();
        for (int i = 0; i < listeners.length; i++) {
            if (listeners[i] == CellEditorListener.class) {
                listener = (CellEditorListener) listeners[i + 1];
                listener.editingStopped(changeEvent);
            }
        }
    }
    
    protected void fireEditingCanceled() {
        CellEditorListener listener;
        Object[] listeners = listenerList.getListenerList();
        for (int i = 0; i < listeners.length; i++) {
            if (listeners[i] == CellEditorListener.class) {
                listener = (CellEditorListener) listeners[i + 1];
                listener.editingCanceled(changeEvent);
            }
        }
    }
    
}  

and this is the CellRenderer which i don't know if i need one, but i think
that i need one for the last column:

  public class GeneralRenderer extends JLabel implements TableCellRenderer { 
    
    public GeneralRenderer() {
        super();       
    }
 
    public Component getTableCellRendererComponent(JTable table, 
Object value, 
boolean isSelected, 
boolean hasFocus, 
int row, 
int column) { 
        return this;
    }
    
}  

Hope it is not a mess!
What i want to do is to display an empty row waiting for the user to fill in
the row. In the current state of the code, when the user fill a cell and move to another, the first one reseted to display nothing.

[Jerret Halter]

are u omiting anything? i do not see any main method

[Nawar Gailani]

Hi Jerret,
The main method is in another file, the AudioForm. I can't post the AudioForm because it is about 3000 lines!
I believe the main method is ok, because i can run the program correctly, and I also assigned the TableModel, CellEditor, and CellRenderer to the AudioTable in the AudioForm correctly. So mostly there is something wrong in one or more of the 3 files i posted.
I will try some ideas and see if they work.
Thanks for your replies.

[Jerret Halter]

The reason that I was wanting it was so that I could run the program and use a debugger to find out what you problem is. Please feel free to e-mail me your file with the main method I would be more then happy to work with it.

[Nawar Gailani]

Ok it is solved.