frames from an applet

  To: comp.lang.java.gui
Hi,

The aim is to write some code so , starting from an applet, the user
can a make a choice (by radio buttons and an OK button), to let pop
up different frames.
Hereby my (simpified) code. What's wrong, no way to generate a frame?
Thanks,
(as a am a novice, all suggestions are wellcome)

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

public class test extends JApplet implements ItemListener {
        JRadioButton radio1;
        ButtonGroup groep;
        JButton knop;
        int a;
        public void init() {
                Container contentPane = getContentPane();
                contentPane.setLayout(new GridLayout(2,0));
                groep = new ButtonGroup();
                radio1 = new JRadioButton("test");
                groep.add(radio1);
                radio1.addItemListener(this);
                contentPane.add(radio1);
                knop = new JButton( "OK");
                contentPane.add(knop);
                knop.addActionListener(new ActionListener() {
                        public void actionPerformed (ActionEvent ev){
                                        if (a ==1) {
                                                frame1 one = new
frame1();
                                                one.frame1();
                                               one.setVisible(true);
                                                }
                                        }
                        });
                }

        public void itemStateChanged(ItemEvent e) {
                if (e.getItemSelectable() == radio1){
                        a = 1;
                        }
                }
        }
class frame1 extends JFrame {
        panel j;
        public void frame1() {
                Container contentPane = getContentPane();
                j = new panel();
                contentPane.add(j);
                JTextField t;
                t = new JTextField(20);
                contentPane.add(t);
                }
        public static void main(String args[]) {
                final JFrame f = new frame1();
                f.setBounds(100, 100, 300, 300);
                f.setVisible(true);
                f.setDefaultCloseOperation(EXIT_ON_CLOSE);
                f.addWindowListener(new WindowAdapter() {
                        public void windowClosed(WindowEvent e) {
                                System.exit(0);
                                }
                        });
                }
        }
class panel extends JPanel {
        panel() {
                setBackground(Color.white);
                }
        public void paintComponent (Graphics g) {
                super.paintComponent(g);
                g.drawString("Hi !!! :-)", 2, 60);
                }
        }

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