Building a J2ME sliding menu with text and images(part-2)

l_arrow = Image.createImage("/slide_arrow_left.png");

      back_index = select_index;      
      select_index += next;      
      time = System.currentTimeMillis();
    }
  }

  public boolean isImage(){
    return back_index != select_index;
  }

  public void paint(Graphics g){  
    g.setColor(255, 0, 0);
    g.fillRect(0, 0, width, height);    
    g.setColor(0, 0, 255);
    
    if(select_index > 0){
      g.drawImage(l_arrow, 2, height / 2, 
      Graphics.LEFT | Graphics.VCENTER);
    }

    if(select_index < icons.length - 1){
      g.drawImage(r_arrow, width - 2, height / 2, 
      Graphics.RIGHT | Graphics.VCENTER);
    }

    g.drawString(labels[select_index], width / 2, 
    height - 2, Graphics.BOTTOM | Graphics.HCENTER);    

    g.setClip(l_arrow.getWidth(), 0, width - 2 * 
    l_arrow.getWidth(), height);
    
    if(select_index != back_index){
      int difference = (int)(System.currentTimeMillis() - time);      
      if(difference > duration){
        difference = duration;
      }
      
      int image_present = select_index > back_index ? 1 : - 1;
      int current_image = width / 2 - image_present * 
      difference * width / duration;

      int next_image = current_image + width * image_present;
      
      g.drawImage(icons[back_index], current_image, height / 2, 
      Graphics.VCENTER | Graphics.HCENTER);      

      g.drawImage(icons[select_index], next_image, height / 2, 
      Graphics.VCENTER | Graphics.HCENTER);
      
      if(difference >= duration){
        back_index = select_index;
      }
    }else{
      g.drawImage(icons[select_index], width / 2, height / 2, 
      Graphics.VCENTER | Graphics.HCENTER);
    }
  }
}