Mine

import java.awt.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Timer;

public class Test 
{ 
  public float Ptr;
  public boolean Boo1;

  public Test()
  {
      face();
      Ptr = 00.0f;
      Boo1 = true; 
  }
  
   public void run()
   {
       while (Ptr <= 99.9f && Boo1 == true)
             {
                 Ptr += 0.1f;
              try {
                   Thread.sleep(1000);
                   
                   //1000 millisecs
                  }
              catch(InterruptedException ex) {
                  }  
             }
     }
   
   public void stop()
   {
       Boo1 = false;
    }
    
  public void face()
  {
      JFrame frame =  new JFrame("button");
      Container contentPane = frame.getContentPane();
      JPanel buttonPanel = new JPanel();
      
      JButton button2 =  new JButton("Run");
      button2.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) { run(); 
            } });
     buttonPanel.add(button2);
     contentPane.add(buttonPanel);
      
      JButton button1 =  new JButton("stop");
      button1.addActionListener(new ActionListener() {
         public void actionPerformed(ActionEvent e) { stop(); 
            } });
     buttonPanel.add(button1);
     contentPane.add(buttonPanel);
     
     frame.pack();
     frame.setVisible(true);
    }  
 
}