✔ JComboBox, andere einträge in der DropDownliste

/*
 * Created on 03.03.2005@14:43:12
 *
 * TODO Some Licence info...
 */
package de.tutorials;

import java.awt.Component;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JList;

/**
 * @author TDarimont
 * 
 * TODO Explain me
 */
public class ComboBoxExample extends JFrame {

    private JComboBox box;

    public ComboBoxExample() {
        super("ComboBoxExample");
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        box = new JComboBox(TimeOfDay.TIMES_OF_DAY.toArray());
        box.setRenderer(new DefaultListCellRenderer() {
            public Component getListCellRendererComponent(JList list,
                    Object value, int index, boolean isSelected,
                    boolean cellHasFocus) {

                if (index == -1) {
                    return super.getListCellRendererComponent(list, value,
                            index, isSelected, cellHasFocus);
                }

                String newValue = (index + 1) + ". " + value;

                return super.getListCellRendererComponent(list, newValue,
                        index, isSelected, cellHasFocus);
            }
        });

        getContentPane().add(box);

        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        new ComboBoxExample();
    }

    static class TimeOfDay {
        public final static String MORNING = "MorgensAA";

        public final static String NOON = "MittagsBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB";

        public final static String EVENINGS = "AbendsCCC";

        public final static List TIMES_OF_DAY = Collections
                .unmodifiableList(new ArrayList() {
                    {
                        add(MORNING);
                        add(NOON);
                        add(EVENINGS);
                    }
                });
    }
}