Not sure I am having StringIndexOutOfBondException

Question

Hi Fox!
I am trying to write a simle code. In my Code I just copy values from Stringbuffer to String. Then delete everything from Stringbuffer and use String in the next block of code. I am not sure why I am having StringIndexOutOfBondException. What?s wrong with my String? Can anybody tell me?
Here is my Code
    String s1 = "one cat two cats in the yardcat according to the above terms accordingly.";
    System.out.println(s1);
    Pattern p = Pattern.compile("above",Pattern.CASE_INSENSITIVE);
    Matcher m = p.matcher(s1);
    StringBuffer sb = new StringBuffer();
    System.out.println("This is in our buffer..."+sb.toString());
    while (m.find()) {
      m.appendReplacement(sb, "");
    m.appendTail(sb);
    System.out.println("This is in our buffer NOW ..."+sb.toString());
    String test = sb.toString();
    System.out.println("In test copy from buffer---"+test);
    sb.delete(0,sb.length());
    System.out.println("This is in our buffer FINALLY ..."+sb.toString());
   // works fine till here
    s1=test;
    System.out.println(s1);
// in this block i get acception.
    Pattern p1 = Pattern.compile("according",Pattern.CASE_INSENSITIVE);
    Matcher m1 = p.matcher(s1);
    while (m.find()) {
      m.appendReplacement(sb, "");
    m.appendTail(sb);
    System.out.println("This is in our buffer NOW ..."+sb.toString());
    test = sb.toString();
    System.out.println("In test copy from buffer---"+test);Thanks in advance

Answer 1

Hi Guys,
I'm not familiar with Pattern and Matcher, so I thought I would try compiling this and see what I can learn by attempting to fix it. Problem is, it compiled and ran fine for me, no errors....
Maybe I am completely missing something?
"one cat two cats in the yardcat according to the above terms accordingly.
This is in our buffer...
This is in our buffer NOW ...one cat two cats in the yardcat according to the terms accordingly.
In test copy from buffer---one cat two cats in the yardcat according to the terms accordingly.
This is in our buffer FINALLY ...
one cat two cats in the yardcat according to the terms accordingly.
This is in our buffer NOW ... terms accordingly.
In test copy from buffer--- terms accordingly.
import java.util.regex.Pattern;
import java.util.regex.Matcher;
public class StringError
     public static void main(String[] agrs)
          String s1 = "one cat two cats in the yardcat according to the above terms accordingly.";
           System.out.println(s1);
           Pattern p = Pattern.compile("above",Pattern.CASE_INSENSITIVE);
           Matcher m = p.matcher(s1);
           StringBuffer sb = new StringBuffer();
           System.out.println("This is in our buffer..."+sb.toString());
           while (m.find()) {
                m.appendReplacement(sb, "");
           m.appendTail(sb);
           System.out.println("This is in our buffer NOW ..."+sb.toString());
           String test = sb.toString();
           System.out.println("In test copy from buffer---"+test);
           sb.delete(0,sb.length());
           System.out.println("This is in our buffer FINALLY ..."+sb.toString());
           // works fine till here
           s1=test;
           System.out.println(s1);
           // in this block i get acception.
           Pattern p1 = Pattern.compile("according",Pattern.CASE_INSENSITIVE);
           Matcher m1 = p.matcher(s1);
           while (m.find()) {
           m.appendReplacement(sb, "");
           m.appendTail(sb);
           System.out.println("This is in our buffer NOW ..."+sb.toString());
           test = sb.toString();
           System.out.println("In test copy from buffer---"+test);
}