Java problem

 public void paintComponent(final Graphics g)
 {
 
 super.paintComponent(g);
 
 g.drawString("pH",75,20);
 
 g.drawLine(40,50,40,330);
 
 
 for (int i=0; i < =14; i++)
 {
 g.drawLine(35,50+i*(280/14),45,50+i*(280/14));
 g.drawString(Integer.toString(14-i),15,55+i*20);
 }
 
 
 new Thread(new Runnable()
 {
 public void run()
 {
 while(true)
 {
 try
 {
 BufferedReader in=new BufferedReader(new FileReader("primer.xls"));
 String line=in.readLine();
 while (true)
 {
 line=in.readLine();
 if (line==null) {break;}
 StringTokenizer tok=new StringTokenizer(line);
 String ph=tok.nextToken(); ph.trim();
 System.out.println(ph);
 g.fillRect(50,330-Integer.parseInt(ph)*(280/14),80,Integer.parseInt(ph)*(280/14));
 Thread.sleep(1000);
 }
 }
 
 catch (Exception e)
 {
 System.out.println("Napaka:" +e.toString());
 }
 }
 }
 }).start();
 
 }