dropdown list box & check box listener 1

[Ngai88]

Hello,
On this page, there exists 20 checkboxes of recipients. I am asked to add a dropdown list box. On the same page, there are same 20 recipients as checkboxes. The task is when the user select a recipient from the dropdown box, the checkbox with the same recipient name will automatically be checked. I looked at the examples of what is published on the web, often they talk about dropbox, checkbox or buttons separately, no example of dropbox and checkbox interacting as listener, pairing together. Would anyone have any examples or templates that I can read up on?

Thanks,
Ngai

 

[prosper]

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class mycom extends JFrame implements ActionListener
      {
       String nameList[] = {"Adam","Bob"};
       JComboBox selectName;
       JCheckBox checkName[];
       public mycom()
              {
               super("JComboBox and checkbox");
               selectName = new JComboBox(nameList);
               checkName = new JCheckBox[20];
               getContentPane().setLayout(new GridLayout(21,1));
               getContentPane().add(selectName);
               selectName.addActionListener(this);
               for (int i=0;i<nameList.length;i++)
                   {
                    checkName[i] = new JCheckBox(nameList[i]);
                    getContentPane().add(checkName[i]);
                   }
              }
       public void actionPerformed(ActionEvent e)
              {
               System.out.println(selectName.getSelectedIndex());
               if (selectName.getSelectedIndex()!=-1)
                  {
                   for (int i=0;i<nameList.length;i++)
                       {
                        checkName[i].setSelected(false);
                       }
                   checkName[selectName.getSelectedIndex()].setSelected(true);
                  }
              }
       public static void main(String args[])
              {
               mycom mycomObj = new mycom();
               mycomObj.setSize(400,400);
               mycomObj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
               mycomObj.setVisible(true);
              }
      }

 

[Ngai88]

Wow!! You are good Prosper !! Thanks a lot. This will definitely give me a very good start. I appreciate it.

Thanks again,
Ngai