Expand hidden text in a JTable Cell

Hi,
Lets say I have a table. One of the columns of the table is short enough that the text of all the cells in that column are not fully visible. If I move my mouse to any of these cells, I would like to see the full text displayed (similar to the way the tool tip text display behavior). How can I do this?
Thanks.

I think you just answered your own question.... extend the table's DefaultCellRenderer to add a tool tip to the component...

Here's a quick example... you may want to look for a multi-line tooltip implementation (there are probably some on JavaRanch, and there are definitely some floating out there on the 'Net...) since your lines of text will be pretty long...

import javax.swing.*;
import javax.swing.table.*;
import java.awt.event.*;
import java.awt.*;
 
public class ToolTipTableFrame extends JFrame {
    public static void main( String[] arg ) {
        new ToolTipTableFrame();
    }
 
    public ToolTipTableFrame() {
        super( "Run your mouse all over me!" );
 
        JTable table = new JTable( new TTTModel() );
        table.setDefaultRenderer( Object.class, new TTTRenderer() );
        JScrollPane scroll = new JScrollPane( table );
        getContentPane().add( scroll );
 
        setSize( 500, 500 );
        addWindowListener( new WindowAdapter() {
            public void windowClosing( WindowEvent e ) {
                System.exit( 0 );
            }
        } );
        setVisible( true );
    }
}
 
class  TTTModel extends javax.swing.table.DefaultTableModel {
    private final Object[][] data = {
        { "Julius Caeser", "Et tu Brutus..." },
        { "Rev. Martin Luther King", "I have a dream!" },
        { "John F. Kennedy", "Ask not what your country can do 
            for you... ask what you can do for your country!" },
        { "Abraham Lincoln", "Four score and seven years ago..." }
    };
 
    private final Object[] colNames = {
        "Name",
        "Motto"
    };
 
    public TTTModel() {
        setDataVector( data, colNames );
    }
}
 
class TTTRenderer extends DefaultTableCellRenderer {
    public Component getTableCellRendererComponent( JTable table,
            Object value, boolean isSelected, boolean hasFocus,
            int row, int col ) {
        JComponent c = (JComponent)super.getTableCellRendererComponent( table,
                value, isSelected, hasFocus, row, col );
        c.setToolTipText( value.toString() );
        return c;
    }
}

-Nate

Thanks for the response. That was helpful. The default tool tip location is to the right and bottom. How can I change the position of the tool tip location? I tried overriding the setToolTipLocation(Point p) method in the cell renderer but that doesn't work. Thanks.

You'll have to override the method :

in your JTable... for some reason, changing it in the TableCellRenderer doesn't affect how the tooltip location is figured out...

-Nate

Thanks a lot. That helped.