how to highlight entire row ?

i m using this logic to highlight a entire row on which caret is positioned , but this is not working what happened here is i m taking out the start and end of a line
this logic only highlights the text part but not the empty blank part (i m not talking about white spaces) just a blank part
where i m getting wrong ?

public void caretUpdate(CaretEvent e) {
        
            JTextComponent comp = (JTextComponent) e.getSource();
//            System.out.println("***************");
//            System.out.println("@start caret listener");
            if(comp != null && highlight != null )
            {
               
                
                comp.getHighlighter().removeAllHighlights();
                
//                System.out.println("removing highligh");
            }
            int pos = comp.getCaretPosition();
            
            /*
             * element has a method which gives us caret position @ each line 
             */
            Element element = Utilities.getParagraphElement(comp, pos);
            int start = element.getStartOffset();
            
            int end = element.getEndOffset();
            System.out.println(start + " " + end);
//            System.out.println("adding highligh");
            try {
                highlight.addHighlight(start, end, painter);
            } catch (BadLocationException ex) {
                Logger.getLogger(LineNumberOnEditor.class.getName()).log(Level.SEVERE, null, ex);
            }
            
        }

See Line Painter for one solution.

Rob Camick wrote:See Line Painter for one solution.

i have used this , but i guess that algorithm is not that much good because when you write or copy past a large document in your editor the editor freeze and later a stack overflow exception is thrown
,do you know any other way , however to be more precise i have implemented my solution and it is working well i have done that by overriding the default highlighter class with my custom implementation
now at this point my only problem is to code a custom method because i have changed the default beheviour of highlighter by overriding paint , so that now it paints the entire width of a line, including the empty portion (remember default highlight only paint the text portion and not the empty portion) but now when i do remove all highlight the default implementation only remove highlights from the text and not from the blank areas , so for that i need to write a custom method,
will any one help me to right one ?
thanks in advance....