Hi All,

Here i am getting the problem with JCombobox. Here i am taking 2 combo
boxes. each of them has 11 elements. They have set the initiall
selected items. If I select the first combo then i am setting
setSelectedIndex(0) for 2nd combo. In this , the scrollbar is not
moving to first element or blank element. From the next time onwords,
the scroll bar also moving to the first element. I need to put the
scroll bar at first element when ever i selected the combo box which is
set to first element or null element. Please help me regaurding
this....

Thanks in advance... Here i am giving the code which i tried....

/*
* Main.java
*
* Created on July 17, 2006, 10:31 AM
*/

package Test;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.UIManager;
import java.awt.BorderLayout;
import javax.swing.UnsupportedLookAndFeelException;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
/**
*
* @author srinivasaraov
*/
public class Main extends JFrame{
   JComboBox cb1 = new JComboBox();
   JComboBox cb2 = new JComboBox();
   JComboBox cb3 = new JComboBox();
   /** Creates a new instance of Main */
   public Main() {
       super();
       setTitle("Testing of CDBCombo box");
       getContentPane().setLayout(new BorderLayout());
       setDefaultCloseOperation(EXIT_ON_CLOSE);

       cb1.addItem("");
       cb1.addItem("One");
       cb1.addItem("Two");
       cb1.addItem("Three");
       cb1.addItem("Four");
       cb1.addItem("Five");
       cb1.addItem("Six");
       cb1.addItem("Seven");
       cb1.addItem("Eight");
       cb1.addItem("Nine");
       cb1.addItem("Ten");

       cb2.addItem("");
       cb2.addItem("AB");
       cb2.addItem("BC");
       cb2.addItem("CD");
       cb2.addItem("DE");
       cb2.addItem("EF");
       cb2.addItem("FG");
       cb2.addItem("GH");
       cb2.addItem("HI");
       cb2.addItem("IJ");
       cb2.addItem("JKL");
       cb1.setSelectedIndex(2);
       cb2.setSelectedIndex(3);

       cb1.addActionListener(new ActionListener() {
           public void actionPerformed(ActionEvent e) {

        cb2.setSelectedIndex(0);
           }
    });

       cb1.setMaximumRowCount(4);
       cb2.setMaximumRowCount(4);
       getContentPane().add(cb1, BorderLayout.NORTH);
       getContentPane().add(cb2,BorderLayout.CENTER);
       //getContentPane().add(cb3, BorderLayout.SOUTH);
       pack();
   }

   /**
    * @param args the command line arguments
    */
   public static void main(String[] args) {
       try {

UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
       } catch (ClassNotFoundException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (InstantiationException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (IllegalAccessException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (UnsupportedLookAndFeelException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
       new Main().show();
   }
   
}

Thanks & Regards

Srinivas