Combo box problem

[vinod_javas]

hey guys., Help me out..

I am doing some project using java swing..in that i get stuck up with one problem in combo box...

I am having 5 items in the combo box(Contains same item names)
for ex:
abc
abc
abc
abc
abc

when i select any one of these item...i am getting the same index value for all items

for Ex:

if i select first abc means it should return the index value 0
and for second item it should return 1
like wise it should retrun index values for all..

but i am getting only 0 for all selected items....

if i change the items in to differnt names.. i am getting the correct output...

Help me out from this bug......

[jwenting]

I wonder what your code is...
Sounds like a problem with your ComboboxModel.

[vinod_javas]

Here is my code..just try this one....
you will get correct out put ..
but if u change that item name means
abc1
abc2
abc3
abc4
abc5

to

abc
abc
abc
abc
abc

i cant get the selected index value .. please someone giveme solution

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

public class combo extends JFrame
{
private JComboBox jComboBox1;
private JPanel contentPane;
JTextField jtf=new JTextField();
public combo()
{
super();
initializeComponent();
this.setVisible(true);
}

private void initializeComponent()
{
jComboBox1 = new JComboBox();
contentPane = (JPanel)this.getContentPane();

jComboBox1.addItem("abc1");
jComboBox1.addItem("abc2");
jComboBox1.addItem("abc3");
jComboBox1.addItem("abc4");
jComboBox1.addItem("abc5");

jComboBox1.addItemListener(new cbx2dDtime());
contentPane.setLayout(null);
addComponent(contentPane, jComboBox1, 135,70,100,22);
addComponent(contentPane, jtf, 164,110,250,22);
this.setTitle("combo - extends JFrame");
this.setLocation(new Point(0, 0));
this.setSize(new Dimension(390, 300));
}

private void addComponent(Container container,Component c,int x,int y,int width,int height)
{
c.setBounds(x,y,width,height);
container.add(c);
}

public class cbx2dDtime implements ItemListener
{
public void itemStateChanged(ItemEvent ie)
{
int sitem=jComboBox1.getSelectedIndex();
jtf.setText("Selected index "+sitem);
}
}

public static void main(String[] args)
{
JFrame.setDefaultLookAndFeelDecorated(true);
JDialog.setDefaultLookAndFeelDecorated(true);
try
{
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
}
catch (Exception ex)
{
System.out.println("Failed loading L&F: ");
System.out.println(ex);
}
new combo();
}
}

[vinod_javas]

guys Help me out.......I got confused with this problem...

[jwenting]

it's quite simple.
The JComboBox check whether the item you selected is in its list of items.
If the same item is in the list more than once (as in your case) it will simply return one of them (and almost certainly, based on my knowledge of the actual implementation of the class, the first one of those items).
It simply can't distinguish between them, as they are indeed all identical.
To change that create a custom ComboBoxModel and assign that to the JComboBox. In that make sure that the items are unique.