/**  
  * Class untuk menampilkan timer  
  */  
 import java.awt.*;  
 import javax.swing.*;  
 public class DigitPane extends JPanel {  
   private int second;  
   public Dimension getPreferredSize(){  
     FontMetrics fm = getFontMetrics(getFont());  
     return new Dimension(fm.stringWidth("00"), fm.getHeight());  
   }
   // function untuk mengubah nilai timer dan mengupdate tampilan
   public void setValue(int newVal){  
     if (second != newVal) {  
       second = newVal;  
       repaint();  
     }  
   }  
   public int getValue(){  
     return second;  
   }
   // function u/ menampilkan integer sebagai string
   private String pad(int value){  
     return String.format("%02d", value);  
   }  
   protected void paintComponent(Graphics g){  
     super.paintComponent(g);  
     g.setFont(new Font("LCD", Font.PLAIN, 24));   
     FontMetrics fm = getFontMetrics(g.getFont());  
     String text = pad(getValue());  
     int x = (getWidth() - fm.stringWidth(text)) / 2;  
     int y = ((getHeight()- fm.getHeight()) / 2) + fm.getAscent();  
     g.drawString(text, x, y);  
   }      
 }