i'm not sure whats wrong with the code for my button could someone help me with this

Code :

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import static javax.swing.JOptionPane.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.*;
import java.text.DecimalFormat;
 
public class ticket extends JFrame implements ActionListener {
 
	static final double SINGLE = 1.40;
	static final double RETURN = 2.40;
	static final double ZONE_A = 3.80;
	static final double ZONE_A_B = 5.50;
 
	  DecimalFormat pounds = new DecimalFormat("£0.00");
	String id;
	 JTextField ticket = new JTextField(5);
	JTextField stp = new JTextField(5);
	int amount = 0; 
	JTextField change = new JTextField(5);
	JTextField paid = new JTextField(5);
	JButton ten = new JButton("10p");
	JButton twenty = new JButton("20p");
	JButton fifty = new JButton("50p");
	JButton pound = new JButton("£1");
	JButton two = new JButton("£2");
	JButton five = new JButton("£5");
	JButton tenp = new JButton("£10");
	JButton twentyp = new JButton("£20");
	JButton cancel = new JButton("Cancel");
	JRadioButton single = new JRadioButton("single (£1.40)",true);
	JRadioButton Return = new JRadioButton("return (£2.40)",true);
	JRadioButton zoneA = new JRadioButton("Zone A (£3.80)",true);
	JRadioButton zoneAB = new JRadioButton("Zone A B (£5.50)",true);
	ButtonGroup type =new ButtonGroup();
	// The spinner gives values from 1 to 10.
	// Spinners allow safe entry of a number in a range.
	 JSpinner numtick = new JSpinner(new SpinnerNumberModel(1, 0, 10, 1));
	 int stpno = 0;
	 private int size = 0;
 
 
	public static void main(String[] args)
	{
		new ticket();
	}
	public ticket()
	{
		  setLayout(new BorderLayout());
         setSize(700, 150);
         setTitle("Redwich Trams - Ticket Machine");
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         JPanel top = new JPanel();
         top.setLayout(new FlowLayout());
         top.add(new JLabel("Ticket Type:   "));
 
		 type.add(single);
		 type.add(Return);
		 type.add(zoneA);
		 type.add(zoneAB);
		 top.add(single);
		 top.add(Return);
		 top.add(zoneA);
		 top.add(zoneAB);
		 top.add(new JLabel("  Tickets"));
		 top.add(numtick);
		 single.addActionListener(this);
		 Return.addActionListener(this);
		 zoneA.addActionListener(this);
		 zoneAB.addActionListener(this);
 
		add("North", top);
		 setVisible(true);
 
		 JPanel middle = new JPanel();
         middle.setLayout(new FlowLayout());
		 middle.add(new JLabel("Ticket Type:   "));
		setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
		 middle.add(ten);
		 middle.add(twenty);
		 middle.add(fifty);
		 middle.add(pound);
		 middle.add(two);
		 middle.add(five);
		 middle.add(tenp);
		 middle.add(twentyp);
		 middle.add(cancel);
		 ten.addActionListener(this);
		 twenty.addActionListener(this);
		 fifty.addActionListener(this);
		 pound.addActionListener(this);
		 two.addActionListener(this);
		 five.addActionListener(this);
		 tenp.addActionListener(this);
		 twentyp.addActionListener(this);
		 cancel.addActionListener(this);
 
		 add("Center", middle);
		 setVisible(true);
 
		 JPanel bottom = new JPanel();
         bottom.setLayout(new FlowLayout());
         bottom.add(new JLabel("   Ticket Cost:"));
		 bottom.add(ticket);
         bottom.add(new JLabel("   Amount Paid:"));
         bottom.add(paid);
         bottom.add(new JLabel("   Amount Still To Pay:"));
         bottom.add(stp); 
		 stp.setEditable(false);
		 bottom.add(new JLabel("   Change:"));
         bottom.add(change);
		 ticket.setEditable(false);
		 paid.setEditable(false);
 
		 change.setEditable(false);
         ticket.setText("£0.00");
		 stp.setText("£0.00");
		 change.setText("£0.00");
		 paid.setText("£0.00");
 
		 add("South", bottom);
		 setVisible(true);
	}
		  public void actionPerformed(ActionEvent e){
	{
			  if (e.getSource() == ten)
			  paid= paid + 10;
			  amount =amount - 10;
			  if (ticket<paid)
			  {
				  change=ticket-paid;
				  }
 
		  if (e.getSource() == twenty)
			  paid=paid+20;
			  amount =amount - 20;
			  if (ticket<paid)
			  {
				  change=ticket-paid;
				  }
 
	  if (e.getSource() == fifty)
			  paid=paid+50;
			  amount =amount - 50;
			  if (ticket<paid)
			  {
				  change=ticket-paid;
				  }
 
				    if (e.getSource() == pound)
			  paid=paid+100;
			  amount =amount - 100;
			  if (ticket<paid)
			  {
				  change=ticket-paid;
				  }
 
				    if (e.getSource() == two)
			  paid=paid+200;
			  amount =amount - 200;
			  if (ticket<paid)
			  {
				  change=ticket-paid;
				  }
 
				    if (e.getSource() == five)
			  paid=paid+500;
			  amount =amount - 500;
			  if (ticket<paid)
			  {
				  change=ticket-paid;
				  }
 
		  if (e.getSource() == tenp)
			  paid=paid+1000;
			  amount =amount - 1000;
			  if (ticket<paid)
			  {
				  change=ticket-paid;
				  }
 
		  if (e.getSource() == twentyp)
			  paid=paid+2000;
			  amount =amount - 2000;
			  if (ticket<paid)
			  {
				  change=ticket-paid;
				  }
	}
 
	{
double tp = 0;
	  int noticket = Integer.parseInt(""+numtick.getValue());
      if (single.isSelected()) tp = 1.40; 
		{
		  ticket.setText(pounds.format(tp));
		  stp.setText(pounds.format(tp));
 
			  }
 
		if (Return.isSelected()) tp = 2.40;
			{
 
          ticket.setText(pounds.format(tp));
		  stp.setText(pounds.format(tp));
			}
 
	 if (zoneA.isSelected()) tp = 3.80;
			  {
			ticket.setText(pounds.format(tp));
			stp.setText(pounds.format(tp));
		     }
 
		 if (zoneAB.isSelected()) tp = 5.50; 
			  {
			ticket.setText(pounds.format(tp));
			stp.setText(pounds.format(tp));
			  }
		{
	if (e.getSource() == cancel);
 
	 ticket.setText("£0.00");
	   stp.setText("£0.00");
	  change.setText("£0.00");
	  paid.setText("£0.00"); 
		 }
 
        }
		  }
 }

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i'm not sure why my button code is not working it looks fine to me but theres errors with it can someone help me out?

Quote:

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button code is not working

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Please explain and post any error messages.

No errors you say? Hmm, my bleeding IDE says otherwise :3.
Using '+' and '<' operators on JTextField's isn't valid syntax.