/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
     import javax.swing.*;  
    import java.text.*;  
    import java.util.*;
/**
 *
 * @author maxim
 */
 
    public class zad1 implements Runnable{  
        JFrame f;  
        Thread t=null;  
        int hours=0, minutes=0, seconds=0;  
        String timeString = "";  
        JButton b;  
      
        zad1(){  
        f=new JFrame();  
          
        t = new Thread(this);  
            t.start();  
          
        b=new JButton();  
            b.setBounds(100,100,100,50);  
          
        f.add(b);  
        f.setSize(300,400);  
        f.setLayout(null);  
        f.setVisible(true);  
    }  
      
       
     public void run() {  
          try {  
             while (true) {  
      
                Calendar cal = Calendar.getInstance();  
                hours = cal.get( Calendar.HOUR_OF_DAY );  
                if ( hours > 12 ) hours -= 12;  
                minutes = cal.get( Calendar.MINUTE );  
                seconds = cal.get( Calendar.SECOND );  
      
                SimpleDateFormat formatter = new SimpleDateFormat("hh:mm:ss");  
                Date date = cal.getTime();  
                timeString = formatter.format( date );  
      
                printTime();  
      
                t.sleep( 1000 );  
             }  
          }  
          catch (InterruptedException e) { }  
     }  
      
    public void printTime(){  
    b.setText(timeString);  
    }  
      
     
        public static void main(String[] args) {  
            zad1 zad1 = new zad1();  
              
    }  
 }