Replace n:th string

Question

Anyone have a nice suggestion for how to replace the n:th string in a string.
Example lets say we have text = "wooho wooho wooho".
And i want to call text.replace("wooho", "blaha", 2);
Which would replace the second occurence in the string so that it would return "wooho blaha wooho".
Any suggestions?

Answer 1

Fixed it! Wasn't so hard after all :P
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class StringReplacer {
     public static String replaceNth(String text, String regexp, String replace, int n){
          Pattern p = Pattern.compile(regexp);
          Matcher m = p.matcher(text);
          StringBuffer sb = new StringBuffer();
          int i=0;
          while (m.find()) {
               if (n == i){
                    m.appendReplacement(sb, replace);
                    break;
               i++;
          m.appendTail(sb);
          return sb.toString();
     public static void main(String[] args){
          String text = "aaaa woohoo fdsfd woohoo fdsfds woohoo fjdskf";
          String r = replaceNth(text, "woohoo", "blaha", 1);
          System.out.println(r);
}