adding listeners to java applets

Im having trouble compiling this code I wrote it says that i can't add a listener to it. But as far as i know I have add all the proper imports. So could some one look at it and tell me where I'm going wrong.

Here is my code

Code:

import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.applet.*; import java.util.*; public class applet3 extends JApplet { private Container mycontentpane=getContentPane(); private JPanel mypanel=new JPanel(); private JTextField firstname, lastname, email; private JButton submit; private JComboBox protection; private String protectionlist []={" Select one","antvirse","anti-malware","virse+malware"}; private JTextArea results= new JTextArea(); private String howlong; private JRadioButton y1,y2,y5,lt; private ButtonGroup time; // how long they want the protection for varible private double totalprice=0.0,price=0.0; private int numyear=0; public void init() { mypanel.setLayout(new GridLayout(11,2)); mypanel.setBackground(Color.GRAY); // header message JLabel heading=new JLabel("Order Form"); heading.setFont(new Font("SansSerif",Font.PLAIN,17)); mypanel.add(heading); //empty cell JLabel emptycell=new JLabel(""); mypanel.add(emptycell); //text fields JLabel fnamelbl= new JLabel("First Name:"); firstname=new JTextField(30); mypanel.add(fnamelbl); mypanel.add(firstname); JLabel lnamelbl= new JLabel("Last Name:"); lastname=new JTextField(30); mypanel.add(lnamelbl); mypanel.add(lastname); JLabel emaillbl= new JLabel("E-mail address:"); email=new JTextField(60); mypanel.add(emaillbl); mypanel.add(email); //drop down list JLabel protectionlbl=new JLabel("What type of protection do you want?"); mypanel.add(protectionlbl); protection= new JComboBox(protectionlist); mypanel.add(protection); // radiobutton list JLabel timelbl=new JLabel("How long do you want protection"); mypanel.add(timelbl); y1=new JRadioButton("1 year",true); y2=new JRadioButton("2 year"); y5=new JRadioButton("5 year"); lt=new JRadioButton("lifetime"); time.add(y1); time.add(y2); time.add(y5); time.add(lt); // listerner for radio buttons y1.addItemListener(this); y2.addItemListener(this); y5.addItemListener(this); lt.addItemListener(this); mypanel.add(y1); JLabel emptycell1=new JLabel(""); mypanel.add(emptycell1); mypanel.add(y2); JLabel emptycell2=new JLabel(""); mypanel.add(emptycell2); mypanel.add(y5); JLabel emptycell3=new JLabel(""); mypanel.add(emptycell3); mypanel.add(lt); //results results.setEditable(false); mypanel.add(results); JLabel emptycell4=new JLabel(""); mypanel.add(emptycell4); JLabel emptycell5=new JLabel(""); mypanel.add(emptycell5); //submit button submit=new JButton("submit"); submit.setMnemonic(KeyEvent.VK_S); mypanel.add(submit); // action listerner for the button submit.addActionListener(this); mycontentpane.add(mypanel); } public void itemStateChanged (ItemEvent e) { if (y1.isSelected()) {numyear=1; howlong="1 year";} else if (y2.isSelected()) {numyear=2; howlong="2 years";} else if (y5.isSelected()) {numyear=4; howlong="5 years";} else if (lt.isSelected()) {numyear=10; howlong="life time";} } public void actionPerformed(ActionEvent e) {//find price if (protection.getSelectedItem().equals("antvirse")) price=29.99; else if (protection.getSelectedItem().equals("anti-malware")) price=24.99; else if (protection.getSelectedItem().equals("virse+malware")) price=44.99; //calcutlaing total price totalprice=price*numyear; //displaying results results.setText( firstname.getText()+" "+lastname.getText()+", \n"+ "You order the "+ protection.getSelectedItem()+" protection \n"+ "for "+ howlong+" your total comes to $"+totalprice+"\n"+ "A summary email will be sent to "+ email.getText()+" shortly."); } }