Программа Секундомер на языке Java

import java.awt.Button;

import java.awt.Color;

import java.awt.Font;

import java.awt.Graphics;

import java.awt.GridLayout;

import java.awt.Label;

import java.awt.Panel;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.ImageIcon;

import javax.swing.JFrame;

import javax.swing.SwingConstants;

public class Main {

      public static Label Lab = new Label("   0.0");

      public static Label Lab1 = new Label("");

      public static Label Lab2 = new Label("");

      public static Label Lab3 = new Label("");

      public static Label Lab4 = new Label("");

      public static Label Lab5 = new Label("");

      public static Button ButClean=new Button("Ñáðîñ");

      public static Button ButStop=new Button("Ñòîï");

      public static Button ButStart=new Button("Ñòàðò");

      public static double time=0;

      public static boolean stop=true;

      public static void main(String[] args) {

            JFrame Ex = new JFrame ("Ñåêóíäîìåð");

            Ex.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            Ex.setSize(600, 400);

            Panel Pan = new Panel();

            Pan.add(Lab3);

            Pan.add(Lab);

            Pan.add(Lab4);

            Pan.add(Lab5);

            Pan.add(Lab1);

            Pan.add(Lab2);

            Pan.add (ButStart);

            Pan.add (ButStop);

            Pan.add (ButClean);

            GridLayout gr = new GridLayout(3,3);

            Pan.setLayout(gr);

            ButStart.setBackground(new Color(200,255,200));

            ButStop.setBackground(new Color(255,200,200));

            ButClean.setBackground(new Color(200,200,255));

            Pan.setBackground(new Color(252,239,148));

            Lab.setFont(new Font("Arial",10,60));

            ButStart.setFont(new Font("Arial",10,60));

            ButStop.setFont(new Font("Arial",10,60));

            ButClean.setFont(new Font("Arial",10,60));

            ButStop.setEnabled(false);

            ButClean.addActionListener(new ActionListener(){

                  public void actionPerformed(ActionEvent evt) {

                        stop=true;

                        time=0;

                        Lab.setText("   0.0");

                        ButStart.setEnabled(true);

                        ButClean.setEnabled(false);

                  }});

            ButClean.setEnabled(false);

            ButStop.addActionListener(new ActionListener(){

                  public void actionPerformed(ActionEvent evt) {

                        ButClean.setEnabled(true);

                        ButStart.setEnabled(false);

                        stop=false;

                  }});

            ButStart.addActionListener(new ActionListener(){

                  public void actionPerformed(ActionEvent evt) {

                        ButStop.setEnabled(true);

                        final TwoThread MyThread = new TwoThread();

                        MyThread.start();

                        ButStart.setEnabled(false);

                  }});

            Ex.add(Pan);

            Ex.setVisible(true);

      }

}

class TwoThread extends Thread

{public void run()

{while (Main.stop)

{

      try{

            TwoThread.sleep(100);

            Main.time+=1;

            Main.Lab.setText("   "+Main.time/10+"");

            }

      catch(InterruptedException MyError){}

            }

      }

}