import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.plaf.basic.*;
public class ComboBoxItem extends JFrame implements ActionListener
{
public ComboBoxItem()
{
Vector model = new Vector();
model.addElement(new Item(1, "car"));
model.addElement(new Item(2, "plane"));
model.addElement(new Item(3, "train"));
model.addElement(new Item(4, "boat"));
model.addElement(new Item(5, "boat aadf asfsdf a asd asd"));
JComboBox comboBox;
// Easiest approach is to just override toString() method
// of the Item class
comboBox = new JComboBox(model);
comboBox.addActionListener(this);
comboBox.putClientProperty("JComboBox.isTableCellEditor", Boolean.TRUE);
getContentPane().add(comboBox, BorderLayout.NORTH);
// Most flexible approach is to create a custom render
// to diplay the Item data
comboBox = new JComboBox(model);
comboBox.setRenderer(new ItemRenderer());
comboBox.addActionListener(this);
getContentPane().add(comboBox, BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent e)
{
JComboBox comboBox = (JComboBox)e.getSource();
Item item = (Item)comboBox.getSelectedItem();
System.out.println(item.getId() + " : " + item.getDescription());
}
class ItemRenderer extends BasicComboBoxRenderer
{
public Component getListCellRendererComponent(
JList list, Object value, int index,
boolean isSelected, boolean cellHasFocus)
{
super.getListCellRendererComponent(list, value, index,
isSelected, cellHasFocus);
if (value != null)
{
Item item = (Item)value;
setText(item.getDescription().toUpperCase());
}
if (index == -1)
{
Item item = (Item)value;
setText("" + item.getId());
}
return this;
}
}
class Item
{
private int id;
private String description;
public Item(int id, String description)
{
this.id = id;
this.description = description;
}
public int getId()
{
return id;
}
public String getDescription()
{
return description;
}
public String toString()
{
return description;
}
}
public static void main(String[] args)
{
JFrame frame = new ComboBoxItem();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}
Gracias por la respuesta, realmente resuelto mi problema :) pero ISN ¿Es malo usar el código obsoleto "Vector"? ¿Hay alguna forma de evitar el uso de vectores? – evilReiko
Vector no está en desuso (al menos en JDK6). Los componentes Swing usan Modelos para almacenar los datos. El DefaultComboBoxModel usa un Vector para almacenar los datos. Si no te gusta, siempre puedes crear tu propio modelo y usar lo que quieras para almacenar los datos. – camickr