Thread: "Error cannot find symbol" "throws BadLocationException"

I am getting the error that it is the thread title when running this code:

void printLines (JTextArea ta) {  
        String temp = content.get(0);    
        String [] splitter = temp.replaceAll("[.,?!:;/]", "").split(" ");  
        ta.append ("O conteudo do arquivo e: ");  
        for (int k=0; k<splitter.length; k++) {   
          if (splitter[k].equals ("bonita")) {  
            //ta.append("B*O*N*I*T*A");  
            Highlighter hilit = new DefaultHighlighter();  
            Highlighter.HighlightPainter painter = new DefaultHighlighter.DefaultHighlightPainter(Color.YELLOW);  
            hilit.addHighlight(0, 5, painter);  
          }    
          ta.append (splitter[k] + " ");  
        }  
        ta.append ("\n");   
      }

The error began to show up when I added this three lines related to the Highlighter. I think it might be related to the index that I am passing to addHighlight but I am not sure.

I made I self-contained version of the error here:

import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
 
public class Main {
  public static void main (String [] args) throws Exception {
    JFrame jframe = new JFrame ();
    JTextArea ta = new JTextArea(20,40); 
    JScrollPane sp = new JScrollPane (ta);
    jframe.setVisible (true);  
    jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    jframe.setLayout(new FlowLayout()); 
    jframe.add(sp);  
    jframe.pack(); 
    String temp = "Test1 Test2 bonita Test3";    
    String [] splitter = temp.replaceAll("[.,?!:;/]", "").split(" ");  
    ta.append ("O conteudo do arquivo e: ");  
    for (int k=0; k<splitter.length; k++) {   
      if (splitter[k].equals ("bonita")) {  
        //ta.append("B*O*N*I*T*A");  
        Highlighter hilit = new DefaultHighlighter();  
        Highlighter.HighlightPainter painter = new DefaultHighlighter.DefaultHighlightPainter(Color.YELLOW);  
        hilit.addHighlight(0, 5, painter);  
      }    
      ta.append (splitter[k] + " ");  
    }  
    ta.append ("\n");   
  }   
}

But with this code I don't get the same error.....what I am getting now it is a nullPointerException in line 24 the

hilit.addHighlight(0, 5, painter);

one
The frame is created shows the two first words before generating the error.

Anyone has an idea about what can be?

I also would appreciate if someone can provide me a few tips, links or whatever about how I can advance in text using the keyboard. In another words, if I press right it advances until a certain occurrence of a certain word, then if I press again, it advances to the next one until I reach the last occurrence of a word.

This thread has been cross posted here:

http://www.java-forums.org/new-java/79716-error-cannot-find-symbol-throws-badlocationexception.html
http://www.coderanch.com/t/614805/GUI/java/Error-find-symbol-throws-BadLocationException

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