Plz help me to put two columns in JCombobox

Question

hi everyone...
Please help anyone to display two column in a jComboBox.......
I want the smple coding.....
with regards
Anand

Answer 1

Hallo.
Afaik, it's not possible using only classes provided in java.swing/java.awt packages.
One possible solution is to use custom renderer. By default JList and JComboBox are rendered using single JLabel. Our renderes should use several labels put on panel as rendereing component. For information see "Providing custom renderer" in "How to Use Combo Boxes" tutorial article, please. http://java.sun.com/docs/books/tutorial/uiswing/components/combobox.html#renderer
Sample (functional but not very nice) code is below. Sorry, I've tried to make it as short as possible.
import java.awt.*;
import javax.swing.*;
public class Main extends JDialog {       
    Main() {       
        JComboBox jPiceList = new JComboBox(new Object[] {
            new Object[] { "Lemon", 0.5 },
            new Object[] { "Tee", 3 },
            new Object[] { "Pinguin", 1 },
        jPiceList.setRenderer(new MyRenderer());       
        add(jPiceList);       
        setDefaultCloseOperation(DISPOSE_ON_CLOSE);
        pack();
    public static void main(String... args)
    throws Exception {               
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new Main().setVisible(true);
* This class use panel with two labels to render
* list (combobox) cell
class MyRenderer implements ListCellRenderer {
    JComponent rendererComponent;
    JLabel labels[] = { new JLabel(), new JLabel() };
    public MyRenderer() {
        // We use panel with two labels as renderer component
        rendererComponent = new JPanel();
        rendererComponent.setLayout(new GridBagLayout());
        // Add labels
        GridBagConstraints c = new GridBagConstraints();
        c.fill = c.HORIZONTAL;
        c.weightx = 0.1;
        rendererComponent.add(labels[0],c);
        rendererComponent.add(labels[1]);
    public Component getListCellRendererComponent(
            JList list, Object value, int index,
            boolean isSelected, boolean cellHasFocus) {
        Object rowData[] = (Object[])value;
        // Prepare colors
        Color foreground = isSelected?
            list.getSelectionForeground(): list.getForeground();
        Color background = isSelected?
            list.getSelectionBackground(): list.getBackground();
        // Set panel colors
        rendererComponent.setForeground(foreground);
        rendererComponent.setBackground(background);
        // TODO Prepare and set panel border for hint
        // @see DefaultListCellRenderer#getListCellRendererComponent        
        // Now set label value and colors
        int col = 0;
        for(JLabel label : labels) {
            label.setBackground(background);
            label.setForeground(foreground);
            label.setText( String.valueOf(rowData[col++]) );
        return rendererComponent;
}