Thread: Why doesn't this work!

My listeners in this program aren't working and I'm getting some errors that I don't understand.Someone please help!(I have to classes one is named LottoMadness and the other one is called LottoEvent.)

import java.awt.*;
import javax.swing.*;
 
public class LottoMadness extends JFrame
 
  {
	LottoEvent lotto = new LottoEvent(this);
  //set up row 1
  JPanel row1 = new JPanel();
  ButtonGroup option = new ButtonGroup();
  JCheckBox quickpick = new JCheckBox("Quick Pick", false);
  JCheckBox personal = new JCheckBox("Personal", true);
 
  //set up row2
  JPanel row2 = new JPanel();
  JLabel numbersLabel = new JLabel("Your picks: ", JLabel.RIGHT);
  JTextField[] numbers = new JTextField[6];
  JLabel winnersLabel = new JLabel("winners: ", JLabel.RIGHT);
  JTextField[] winners = new JTextField[6];
 
  //set up row 3
  JPanel row3 = new JPanel();
  JButton stop = new JButton("Stop");
  JButton play = new JButton("Play");
  JButton reset = new JButton("Reset");
 
  //set up row 4
  JPanel row4 = new JPanel();
  JLabel got3Label = new JLabel("3 of 6: ", JLabel.RIGHT);
  JTextField got3 = new JTextField("0");
  JLabel got4Label = new JLabel("4 of 6: ", JLabel.RIGHT);
  JTextField got4 = new JTextField("0");
  JLabel got5Label = new JLabel("5 of 6: ", JLabel.RIGHT);
  JTextField got5 = new JTextField("0");
  JLabel got6Label = new JLabel("6 of 6: ", JLabel.RIGHT);
  JTextField got6 = new JTextField("0", 10);
 
  JLabel drawingsLabel = new JLabel("Drawings: ", JLabel.RIGHT);
  JTextField drawings = new JTextField("0");
  JLabel yearsLabel = new JLabel("Years: ", JLabel.RIGHT);
  JTextField years = new JTextField("");
 
  public LottoMadness()
    {
	super("Lotto Madness");
	setSize(550, 270);
	setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	GridLayout layout = new GridLayout(5, 1, 10, 10);
	setLayout(layout);
 
	// Add listeners
	quickpick.addItemListener(lotto);
	personal.addItemListener(lotto);
	stop.addItemListener(lotto);
	play.addActionListener(lotto);
	reset.addActionListener(lotto);
 
	FlowLayout layout1 = new FlowLayout(FlowLayout.CENTER, 10, 10);
 
	option.add(quickpick);
	option.add(personal);
	row1.setLayout(layout1);
	row1.add(quickpick);
	row1.add(personal);
	add(row1);
 
	GridLayout layout2 = new GridLayout(2, 7,10, 10);
	row2.setLayout(layout2);
	row2.add(numbersLabel);
	for(int i = 0; i < 6; i++)
	  {
	    numbers[i] = new JTextField();
	    row2.add(numbers[i]);
	  } 
 
	row2.add(winnersLabel);
	for(int i =0; i < 6; i++)
	  {
	   winners[i] = new JTextField();
	   winners[i].setEditable(false);
	   row2.add(winners[i]);
	  }
	add(row2);
 
	FlowLayout layout3 = new FlowLayout(FlowLayout.CENTER, 10,10);
	row3.setLayout(layout3);
	stop.setEnabled(false);
	row3.add(stop);
	row3.add(play);
	row3.add(reset);
	add(row3);
 
	GridLayout layout4 = new GridLayout(2, 3, 20, 10);
	row4.setLayout(layout4);
	row4.add(got3Label);
	got3.setEditable(false);
	row4.add(got3);
	row4.add(got4Label);
	got4.setEditable(false);
	row4.add(got4);
	row4.add(got5Label);
	got5.setEditable(false);
	row4.add(got5);
	row4.add(got6Label);
	got6.setEditable(false);
	row4.add(got6);
	row4.add(drawingsLabel);
	drawings.setEditable(false);
	row4.add(drawings);
	row4.add(yearsLabel);
	years.setEditable(false);
	row4.add(years);
	add(row4);
 
	setVisible(true);
 
    }
 
  public static void main(String args[])
    {
	  LottoMadness frame = new LottoMadness();
    }
 
  }

import javax.swing.*;
import java.awt.event.*;
 
public class LottoEvent implements ItemListener, ActionListener, Runnable
  {
  LottoMadness gui;
  Thread playing;
 
  public LottoEvent(LottoMadness in)
    {
	 gui = in;  
    }
 
  public void actionPerformed(Action e)
    {
	String command = ((AbstractButton) e).getActionCommand();
 
	if(command.equals("play"))
	  {
	  startPlaying();	
	  }
 
	if(command.equals("Stop"))
	  {
      stopPlaying();
	  }
 
	if(command.equals("Reset"))
	  {
	  clearAllFields();
	  }
 
    }
 
  void startPlaying()
    {
	  playing = new Thread(this); 
	  playing.start();
	  gui.play.setEnabled(false);
	  gui.stop.setEnabled(true);
	  gui.reset.setEnabled(false);
	  gui.quickpick.setEnabled(false);
	  gui.personal.setEnabled(false);
	}
 
  void stopPlaying()
    {
	  gui.stop.setEnabled(false);
	  gui.play.setEnabled(true);
	  gui.reset.setEnabled(true);
	  gui.quickpick.setEnabled(true);
	  gui.personal.setEnabled(true);
	  playing = null;
    }
  void clearAllFields()
    {
	  for(int i = 0; i < 6; i++)
	    {
	    gui.numbers[i].setText(null);
	    gui.winners[i].setText(null);
	    }
 
	  gui.got3.setText("0");
	  gui.got4.setText("0");
	  gui.got5.setText("0");
	  gui.got6.setText("0");
	  gui.drawings.setText("0");
	  gui.years.setText("0");
 
	}
 
  public void itemStateChanged(ItemEvent event)
    {
	Object item = event.getItem();
	if(item == gui.quickpick)
	  {
 
	  for(int i = 0; i < 6; i++)
	    {
		int pick;  
	    }
	  int pick;
	int i = 0;
	do 
	    {
		pick = (int) Math.floor(Math.random() * 50 + 1);  
	    }
	  while (numberGone(pick, gui.numbers, i));
	  gui.numbers[i].setText("" + pick);
 
	  }
 
    }
 
 
 
 
  void addOneToField(JTextField field)
    {
	int num = Integer.parseInt("0" + field.getText());
	num++;
	field.setText("" + num);
 
    }
 
  boolean numberGone(int num, JTextField[] pastNums, int count)
    {
	for(int i = 0; i < count; i++)
	  {
	  if(Integer.parseInt(pastNums[i].getText()) == num)
	    {
		  return true;
	    }
 
	  }
	 return false;
    }
 
  boolean matchedOne(JTextField win, JTextField[] allPicks)
    {
	for(int i = 0; i < 6; i++)
	  {
	  String winText = win.getText();
	  if( winText.equals(allPicks[i].getText() ) )
	    {
		return true;  
	    }
 
	  }
	 return false;
    }
 
  public void run()
    {
	Thread thisThread = Thread.currentThread();
	while(playing == thisThread)
	  {
	  addOneToField(gui.drawings);
	  int draw = Integer.parseInt(gui.drawings.getText());
	  float numYears = (float)draw / 104;
	  gui.years.setText("" + numYears);
 
	  int matches = 0;
	  for(int i = 0; i < 6; i ++)
	    {
		int ball;
		do
		  {
		  ball = (int) Math.floor(Math.random() * 50 + 1);
		  }
		while(numberGone(ball, gui.winners, i));
		gui.winners[i].setText("" + ball);
		if (matchedOne(gui.winners[i], gui.numbers))
		  {
		  matches++;	
		  }
		switch(matches)
		  {
		case 3:
			addOneToField(gui.got3);
			break;
		case 4:
			addOneToField(gui.got4);
			break;
		case 5:
			addOneToField(gui.got6);
			break;
		case 6:
			addOneToField(gui.got6);
			gui.stop.setEnabled(false);
			gui.play.setEnabled(true);
			playing = null;
	 	  }
 
		try
		  {
		  Thread.sleep(100);
		  }
		catch(InterruptedException e)
		  {
		  System.out.println("Error*");
		  }
	    }
	  }
	}