Combo Box in a JTable not appearing

Question

Hi Swing,
I have a snippet of code that I took from the Swing guide for JTables that adds a JComboBox into the 3rd column in the table. However, the ComboBox doesnt appear?
Can anyone see what is going wrong? Code is below:- I can post more if needed:-
     public void addTable() {
          tableModel = new MyTableModel(rows,columns);
          relationTable = new JTable(tableModel);
       //Set up the editor for the sport cells.
        TableColumn sportColumn = table.getColumnModel().getColumn(2);                                              
        JComboBox allStaff = new JComboBox();
        allStaff.addItem("Snowboarding");
        allStaff.addItem("Rowing");
        allStaff.addItem("Knitting");
        allStaff.addItem("Speed reading");
        allStaff.addItem("Pool");
        allStaff.addItem("None of the above");
        sportColumn.setCellEditor(new DefaultCellEditor(allStaff));
          // set so only one row can be selected at once
          relationTable.setAutoResizeMode( JTable.AUTO_RESIZE_OFF );
          relationTable.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
          // add to pane:-
          JScrollPane scrollPane3 = new JScrollPane(relationTable);
          scrollPane3.setBounds(X,Y,Z,W);
          getContentPane().add(scrollPane3 );
     }Cheers

Answer 1

hi
look I will give u a simple code I created based on your combo box
enjoy (:
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;
import java.awt.*;
public class TablCo extends JPanel {
static JFrame frame;
JTable table;
DefaultTableModel tm;
public TablCo() {
super(new BorderLayout());
JPanel leftPanel = createVerticalBoxPanel();
//Create a table model.
tm = new DefaultTableModel();
tm.addColumn("Column 0");
tm.addColumn("Column 1");
tm.addColumn("Column 2");
tm.addColumn("Column 3");
tm.addRow(new String[]{"01", "02", "03", "Snowboarding"});
tm.addRow(new String[]{"04 ", "05", "06", "Snowboarding"});
tm.addRow(new String[]{"07", "08", "09", "Snowboarding"});
tm.addRow(new String[]{"10", "11", "12", "Snowboarding"});
//Use the table model to create a table.
table = new JTable(tm);
          //insert a combo box in table
          TableColumn sportColumn = table.getColumnModel().getColumn(3);
          JComboBox allStaff = new JComboBox();
               allStaff.addItem("Snowboarding");
               allStaff.addItem("Rowing");
               allStaff.addItem("Knitting");
               allStaff.addItem("Speed reading");
               allStaff.addItem("Pool");
               allStaff.addItem("None of the above");
          //DefaultCellEditor dce = new DefaultCellEditor(allStaff);
          sportColumn.setCellEditor(new DefaultCellEditor(allStaff));
          JScrollPane tableView = new JScrollPane(table);
tableView.setPreferredSize(new Dimension(300, 100));
          leftPanel.add(createPanelForComponent(tableView, "JTable"));
          JFrame.setDefaultLookAndFeelDecorated(true);
          //Create and set up the window.
          frame = new JFrame("BasicDnD");
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          //Create and set up the content pane.
          frame.setContentPane(leftPanel);
          //Display the window.
          frame.pack();
          frame.setVisible(true);
          protected JPanel createVerticalBoxPanel() {
          JPanel p = new JPanel();
          p.setLayout(new BoxLayout(p, BoxLayout.PAGE_AXIS));
          p.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
          return p;
          public JPanel createPanelForComponent(JComponent comp,
          String title) {
          JPanel panel = new JPanel(new BorderLayout());
          panel.add(comp, BorderLayout.CENTER);
          if (title != null) {
          panel.setBorder(BorderFactory.createTitledBorder(title));
          return panel;
public static void main(String[] args) {
     new TablCo();
}