Need code help

Question

Could somebody add an OK button to this code so that when it is clicked a dialog box would pop-up stating the name and which options were selected? Thanks.
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
  <applet code="Lister" width=300 height=180>
  </applet>
public class Lister extends Applet implements ActionListener
List os, browser;
String msg = "";
public void init()
   os = new List (4, true);
   browser = new List (4, false);
   os.add("Windows 98");
   os.add("Windows NT/2000");
   os.add("Solaris");
   os.add("MacOS");
   browser.add("Netscape 1.1");
   browser.add("Netscape 2.x");
   browser.add("Netscape 3.x");
   browser.add("Netscape 4.x");
   browser.add("Internet Explorer 3.0");
   browser.add("Internet Explorer 4.0");
   browser.add("Internet Explorer 5.0");
   browser.add("Lynx 2.4");
   add(os);
   add(browser);
   os.addActionListener(this);
   browser.addActionListener(this);
   public void actionPerformed(ActionEvent ae)
     repaint();
    public void paint(Graphics g)
      int idx[];
      msg = "Current OS: ";
      idx = os.getSelectedIndexes();
      for(int i=0; i<idx.length; i++)
      msg += os.getItem (idx) + " ";
g.drawString(msg, 6, 120);
msg = "Current Browser: ";
msg += browser.getSelectedItem();
g.drawString(msg, 6, 140);

Answer 1

This works
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Graphics;
import java.awt.List;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
<applet code="Lister" width=300 height=180>
</applet>
public class Lister extends Applet implements ActionListener
List os, browser;
String msg = "";
public void init()
os = new List (4, true);
browser = new List (4, false);
os.add("Windows 98");
os.add("Windows NT/2000");
os.add("Solaris");
os.add("MacOS");
browser.add("Netscape 1.1");
browser.add("Netscape 2.x");
browser.add("Netscape 3.x");
browser.add("Netscape 4.x");
browser.add("Internet Explorer 3.0");
browser.add("Internet Explorer 4.0");
browser.add("Internet Explorer 5.0");
browser.add("Lynx 2.4");
Button button = new Button("OK");
add(os);
add(browser);
add(button,BorderLayout.SOUTH);
os.addActionListener(this);
browser.addActionListener(this);
button.addActionListener(this);
public void actionPerformed(ActionEvent ae)
repaint();
public void paint(Graphics g)
int idx[];
msg = "Current OS: ";
idx = os.getSelectedIndexes();
for(int i=0; i<idx.length; i++)
msg += os.getItem (idx) + " ";
g.drawString(msg, 6, 120);
msg = "Current Browser: ";
msg += browser.getSelectedItem();
g.drawString(msg, 6, 140);