combobox selection

hi
jcomboBox is easy to use .in this code sea it and line start with ***
-------------------
package sorting;

import java.awt.Color;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Random;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.WindowConstants;

public class MainWindow extends JFrame{
private JButton start;
public JTextField size;
private JPanel contentPane;
private JLabel L;
private ViewControl a;
private String s;
***private JComboBox cb;
***private String ArrayType[] = {"Inverse Sorted","Random Array","Sorted Array"};
private int[] d;
public MainWindow(){
super("Sorting");

JLabel ArrayLabel = new JLabel();
L = new JLabel();
size = new JTextField();
***cb = new JComboBox(ArrayType);
start = new JButton();
ButtonHandler myhandler = new ButtonHandler();
start.addActionListener(myhandler);
this.addWindowListener(new WindowAdapter( ) {
public void windowClosing(WindowEvent e) { System.exit(0); }
});
contentPane = (JPanel)this.getContentPane();
//
// ArrayLabel
//
ArrayLabel.setForeground(new Color(219, 213, 213));
ArrayLabel.setText("Array Size 1 : 350");
//
// L
//
L.setForeground(new Color(208, 205, 205));
L.setText("Array Type");
//
// Size
//
size.setText("100");

//
// Start
//
start.setText("Start Sort");

//
// contentPane
//
contentPane.setLayout(null);
contentPane.setBackground(new Color(55, 21, 159));
addComponent(contentPane, ArrayLabel, 103,143,106,20);
addComponent(contentPane, L, 97,35,106,23);
addComponent(contentPane, size, 220,141,100,22);
addComponent(contentPane, cb, 221,36,100,22);
addComponent(contentPane, start, 323,251,83,28);
//
// MainWin
//
this.setTitle("Sorting ");
this.setLocation(new Point(200, 200));
this.setSize(new Dimension(464, 350));
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
this.setResizable(false);


//
// TODO: Add any constructor code after initializeComponent call
//

this.setVisible(true);

}
/** Add Component Without a Layout Manager (Absolute Positioning) */
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 String selectedItem(){
System.out.println((String)cb.getSelectedItem());
return (String) cb.getSelectedItem();
}
public int[] getArray(){
return d;
}
public class ButtonHandler implements ActionListener {
public void actionPerformed ( ActionEvent e ){
if( e.getSource() == start ){

s=size.getText().toString();
int num = Integer.parseInt(s);
int[] data = new int[num];
Random generator = new Random();
*** if( (cb.getSelectedItem() == "Random Array" )){

//generate the data randomly in the array.
for(int i=0 ; i<data.length ; i++ )
data[i] = 1 + generator.nextInt(20);
d = data;
for(int i=0 ; i<num ; i++)
System.out.print(data[i]);
*** }else if (cb.getSelectedItem() == "Sorted Array" ){
int j = 0;
for(int i=0;i<data.length;i++){
if(i%(data.length/15)==0)
j++;
data[i]=j;
}
d = data;
}
*** else{
int j = 0;
for(int i=0;i<data.length;i++){
if(i%(data.length/15)==0)
j++;
data[data.length-i-1]=j;
}
d = data;
}
a = new ViewControl(num, data);
a.pack();
a.setVisible(true);
}
}
}
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 MainWindow();
}
}
----------------------------
and

What I meant was,the listener should be called only when user clicks an item from the comboPopup menu or when he presses "Enter".

But the action listener is getting called even if I move through the items in the popup,which I dont want...Also when the user types a keystroke in a read-only combobox and an item in the combobox starts with the typed keystroke, the combobox will select that item & calls the action Listener,Which also I dont want.

Dlorde,Thank u very much...

That will do..