Removing the url from text using java

Question

How to remove the URLs present in text example

String str=\"Fear psychosis after #AssamRiots - http://www.google.com/LdEbWTgD http://www.yahoo.com/mksVZKBz\"         


        

Answer 1

m.group(0) should be replaced with an empty string rather than m.group(i) where i is incremented with every call to m.find() as mentioned in one of the answers above.

private String removeUrl(String commentstr)
{
    String urlPattern = "((https?|ftp|gopher|telnet|file|Unsure|http):((//)|(\\\\))+[\\w\\d:#@%/;$()~_?\\+-=\\\\\\.&]*)";
    Pattern p = Pattern.compile(urlPattern,Pattern.CASE_INSENSITIVE);
    Matcher m = p.matcher(commentstr);
    StringBuffer sb = new StringBuffer(commentstr.length);
    while (m.find()) {
        m.appendReplacement(sb, "");
    }
    return sb.toString();
}