combobox in JTable column

[emekadavid]

can anyone help me flesh out the problem?
I wanted to insert a combo box into one of the columns of
a JTable. although the combo box is drawn, the list
of the data model fails to render.

import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;

public class TableAvecRenderer extends JPanel {

public TableAvecRenderer(){


JTable table = new JTable(new TheModel());
//place table in a scroll pane
JScrollPane pane = new JScrollPane(table);
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
table.setDefaultRenderer(JComboBox.class, new CellRenderer());
this.add(pane);
}

class CellRenderer extends JComboBox
implements TableCellRenderer {

public CellRenderer(){
setOpaque(true);
}

public Component getTableCellRendererComponent(
JTable table, Object value,
boolean isSelected, boolean hasFocus,
int row, int column) {

//let all the cells in this column
//be rendered as a drop-down list

JComboBox hobbies = (JComboBox)value;
hobbies.setEnabled(true);
return this;
}
}

class TheModel extends AbstractTableModel {

String[] sports = {"Footbals", "BasketBall", "HandBall",
"Hockey"};
JComboBox box = new JComboBox(sports);

Object[] cols = {
"FirstName", "LastName", "Sex",
"Age", "State", "educated", "hobbies"
};

Object[][] rows = {
{"David", "Odimegwu","M", "32",
"Imo", new Boolean(false), box},
{"Micheal", "Eke", "M", "34",
"Abia", new Boolean(true), box},
{"Justina", "Akunnaya", "F", "25",
"Anambra", new Boolean(true), box}
};

//implementing the abstract methods.
public Object getValueAt(int row, int col){
return rows[row][col];
}

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

public int getRowCount(){
return rows.length;
}

//implment this class for renderer
@Override
public Class<?> getColumnClass(int col){
return getValueAt(0,col).getClass();
}

@Override
public String getColumnName(int col){
return (String)cols[col];
}
}
private static void showGUI(){
JFrame frame = new JFrame("Simple Table");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E);

TableAvecRenderer contentPane = new TableAvecRenderer();
frame.setContentPane(contentPane);

frame.pack();
frame.setVisible(true);
}
public static void main(String[] args){
SwingUtilities.invokeLater(new Runnable(){
public void run(){
showGUI();
}
});
}

}

thanx

[JosAH]

Look at your CellRenderer: it is a JComboBox (you extend from it) but you never
populate it with any data. Also your TableModel returns the wrong class, it doesn't
give the JTable any indication that it should use a JComboBox for its renderer
and editor.

kind regards,

Jos