Impletmenting timer into scoreboard

[hurly]

Ok, I'm stumped and asking for a push. I need help adding an instance variable for my timer in my frame class.
After that I need to :
Instantiate your timer. Pass in the initial time (in seconds) and a reference to your timer display JTextField object. This can be done when you declare the variable in the above step (ScoreboardTimer timer = new ScoreboardTimer(600, txtTimerDisplay);).

I am confused.......

What I have so far: Timer

import java.text.DecimalFormat;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JTextField;


public class ScoreBoardTimer extends Thread

{
    private boolean running = false;
    private int counter = 600;
    private JTextField timerDisplay = null;

    public ScoreBoardTimer(int seconds, JTextField timerDisplay)

    {
        this.counter = seconds;
        this.timerDisplay = timerDisplay;
    }

    public int getCounter()
    {
      return counter;
    }

    public void toggle()
    {
      running = !running;
    }

    public void run()
    {
      while (counter > 0)
      {
          DecimalFormat df = new DecimalFormat("00");
          try
          {
            sleep(1000);
          }
          catch (InterruptedException e)
          {

          }
          if (running)
          {
            counter--;
            timerDisplay.setText((counter/60) + ":" + df.format(counter%60));
          }
      }
    }
}

then my frame:

import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.GridBagLayout;
import java.awt.BorderLayout;
import javax.swing.JPanel;
import java.awt.Color;
import javax.swing.JTextField;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.Font;
import javax.swing.JLabel;
import javax.swing.JButton;
import javax.swing.*;
import java.text.*;

public class ScoreboardFrame extends JFrame
{
  JMenuItem menuFileExit = new JMenuItem();
  JMenu menuFile = new JMenu();
  JMenuBar menuBar1 = new JMenuBar();
  BorderLayout borderLayout1 = new BorderLayout();
  JPanel panelScoreboard = new JPanel();
  GridBagLayout gridBagLayout1 = new GridBagLayout();
  JTextField txtHomeScore = new JTextField();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JTextField txtGuests = new JTextField();
  JTextField txtTime = new JTextField();
  JPanel panelButtons = new JPanel();
  JButton btnTimeControl = new JButton();
  JButton btnHomeAdd = new JButton();
  JButton btnHomeSub = new JButton();
  JButton btnGuestsAdd = new JButton();
  JButton btnGuestsSub = new JButton();
  DecimalFormat df = new DecimalFormat("00");

  int homeScore = 0;
  int guestsScore = 0;




  public ScoreboardFrame()
  {
    try
    {
      jbInit();
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }

  }

  private void jbInit() throws Exception
  {
    this.setJMenuBar(menuBar1);
    this.getContentPane().setLayout(borderLayout1);
    this.setSize(new Dimension(534, 300));
    this.setTitle("Basketball Scoreboard");
    menuFile.setText("File");
    panelScoreboard.setBackground(new Color(99, 82, 227));
    panelScoreboard.setLayout(gridBagLayout1);
    txtHomeScore.setText("00");
    txtHomeScore.setPreferredSize(new Dimension(100, 75));
    txtHomeScore.setFont(new Font("SansSerif", 1, 60));
    txtHomeScore.setForeground(Color.red);
    txtHomeScore.setEditable(false);
    jLabel1.setText("Home");
    jLabel1.setFont(new Font("Dialog", 1, 20));
    jLabel1.setForeground(Color.white);
    jLabel2.setText("Guests");
    jLabel2.setForeground(Color.white);
    jLabel2.setFont(new Font("Dialog", 1, 20));
    txtGuests.setText("00");
    txtGuests.setCaretColor(Color.red);
    txtGuests.setForeground(Color.red);
    txtGuests.setEditable(false);
    txtGuests.setPreferredSize(new Dimension(100, 75));
    txtGuests.setFont(new Font("SansSerif", 1, 60));
    txtTime.setText("10:00");
    txtTime.setFont(new Font("SansSerif", 1, 60));
    txtTime.setForeground(Color.red);
    txtTime.setEditable(false);
    btnTimeControl.setText("Start/Stop");
    btnTimeControl.setForeground(Color.red);
    btnTimeControl.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent e)
        {
          btnTimeControl_actionPerformed(e);
        }
      });
    btnHomeAdd.setText("Home +");
    btnHomeAdd.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent e)
        {
          btnHomeAdd_actionPerformed(e);
        }
      });
    btnHomeSub.setText("Home -");
    btnHomeSub.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent e)
        {
          btnHomeSub_actionPerformed(e);
        }
      });
    btnGuestsAdd.setText("Guests +");
    btnGuestsAdd.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent e)
        {
          btnGuestsAdd_actionPerformed(e);
        }
      });
    btnGuestsSub.setText("Guests -");
    btnGuestsSub.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent e)
        {
          btnGuestsSub_actionPerformed(e);
        }
      });

    menuFileExit.setText("Exit");
    menuFileExit.addActionListener(new ActionListener()
      {
        public void actionPerformed(ActionEvent ae)
        {
          fileExit_ActionPerformed(ae);
        }
      });
    menuFile.add(menuFileExit);
    menuBar1.add(menuFile);
    panelScoreboard.add(txtHomeScore, new GridBagConstraints(0, 1, 1, 1, 1.0, 1.0, GridBagConstraints.NORTHWEST, GridBagConstraints.NONE, new Insets(4, 4, 4, 4), 1, 1));
    panelScoreboard.add(jLabel1, new GridBagConstraints(0, 0, 1, 1, 1.0, 1.0, GridBagConstraints.WEST, GridBagConstraints.NONE, new Insets(4, 4, 4, 4), 1, 1));
    panelScoreboard.add(jLabel2, new GridBagConstraints(4, 0, 1, 1, 1.0, 1.0, GridBagConstraints.EAST, GridBagConstraints.NONE, new Insets(4, 4, 4, 4), 1, 1));
    panelScoreboard.add(txtGuests, new GridBagConstraints(4, 1, 1, 1, 1.0, 1.0, GridBagConstraints.NORTHEAST, GridBagConstraints.NONE, new Insets(4, 4, 4, 4), 1, 1));
    panelScoreboard.add(txtTime, new GridBagConstraints(3, 0, 1, 1, 0.0, 0.0, GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(0, 0, 0, 0), 0, 0));
    this.getContentPane().add(panelScoreboard, BorderLayout.CENTER);
    panelButtons.add(btnHomeAdd, null);
    panelButtons.add(btnHomeSub, null);
    panelButtons.add(btnTimeControl, null);
    panelButtons.add(btnGuestsAdd, null);
    panelButtons.add(btnGuestsSub, null);
    this.getContentPane().add(panelButtons, BorderLayout.SOUTH);
  }

  void fileExit_ActionPerformed(ActionEvent e)
  {
    System.exit(0);
  }

  void btnTimeControl_actionPerformed(ActionEvent e)
  {

  }

  void btnHomeAdd_actionPerformed(ActionEvent e)
  {
    homeScore++;
    txtHomeScore.setText(df.format(homeScore));
  }

  void btnHomeSub_actionPerformed(ActionEvent e)
  {
    homeScore--;
    txtHomeScore.setText(df.format(homeScore));
  }

  void btnGuestsAdd_actionPerformed(ActionEvent e)
  {
    guestsScore++;
    txtGuests.setText(df.format(guestsScore));
  }

  void btnGuestsSub_actionPerformed(ActionEvent e)
  {
    guestsScore--;
    txtGuests.setText(df.format(guestsScore));
  }

}

and finally my program/application:

import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.UIManager;
import java.awt.Dimension;
import java.awt.Toolkit;

public class ScoreboardApp 
{
  public ScoreboardApp()
  {
    Frame frame = new ScoreboardFrame();
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height)
    {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width)
    {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
    frame.addWindowListener(new WindowAdapter()
      {
        public void windowClosing(WindowEvent e)
        {
          System.exit(0);
        }
      });
    frame.setVisible(true);
  }

  public static void main(String[] args)
  {
    try
    {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }

    new ScoreboardApp();
  }
}

I need to get my timer implemented into my program but I've gotten nada accompished in the past 2 hours. Any guidance is greatly appreciated.

Hurly